ARCnet Hardware¶
Note
- This file is a supplement to arcnet.txt. Please read that for generaldriver configuration help.
- This file is no longer Linux-specific. It should probably be moved outof the kernel sources. Ideas?
Because so many people (myself included) seem to have obtained ARCnet cardswithout manuals, this file contains a quick introduction to ARCnet hardware,some cabling tips, and a listing of all jumper settings I can find. Pleasee-mailapenwarr@worldvisions.ca with any settings for your particular card,or any other information you have!
Introduction to ARCnet¶
ARCnet is a network type which works in a way similar to popular Ethernetnetworks but which is also different in some very important ways.
First of all, you can get ARCnet cards in at least two speeds: 2.5 Mbps(slower than Ethernet) and 100 Mbps (faster than normal Ethernet). In fact,there are others as well, but these are less common. The different hardwaretypes, as far as I’m aware, are not compatible and so you cannot wire a100 Mbps card to a 2.5 Mbps card, and so on. From what I hear, my driver doeswork with 100 Mbps cards, but I haven’t been able to verify this myself,since I only have the 2.5 Mbps variety. It is probably not going to saturateyour 100 Mbps card. Stop complaining. :)
You also cannot connect an ARCnet card to any kind of Ethernet card andexpect it to work.
There are two “types” of ARCnet - STAR topology and BUS topology. Thisrefers to how the cards are meant to be wired together. According to mostavailable documentation, you can only connect STAR cards to STAR cards andBUS cards to BUS cards. That makes sense, right? Well, it’s not quitetrue; see below under “Cabling.”
Once you get past these little stumbling blocks, ARCnet is actually quite awell-designed standard. It uses something called “modified token passing”which makes it completely incompatible with so-called “Token Ring” cards,but which makes transfers much more reliable than Ethernet does. In fact,ARCnet will guarantee that a packet arrives safely at the destination, andeven if it can’t possibly be delivered properly (ie. because of a cablebreak, or because the destination computer does not exist) it will at leasttell the sender about it.
Because of the carefully defined action of the “token”, it will always makea pass around the “ring” within a maximum length of time. This makes ituseful for realtime networks.
In addition, all known ARCnet cards have an (almost) identical programminginterface. This means that with one ARCnet driver you can support anycard, whereas with Ethernet each manufacturer uses what is sometimes acompletely different programming interface, leading to a lot of different,sometimes very similar, Ethernet drivers. Of course, always using the sameprogramming interface also means that when high-performance hardwarefacilities like PCI bus mastering DMA appear, it’s hard to take advantage ofthem. Let’s not go into that.
One thing that makes ARCnet cards difficult to program for, however, is thelimit on their packet sizes; standard ARCnet can only send packets that areup to 508 bytes in length. This is smaller than the Internet “bare minimum”of 576 bytes, let alone the Ethernet MTU of 1500. To compensate, an extralevel of encapsulation is defined by RFC1201, which I call “packetsplitting,” that allows “virtual packets” to grow as large as 64K each,although they are generally kept down to the Ethernet-style 1500 bytes.
For more information on the advantages and disadvantages (mostly theadvantages) of ARCnet networks, you might try the “ARCnet Trade Association”WWW page:
Cabling ARCnet Networks¶
This section was rewritten by
Vojtech Pavlik <vojtech@suse.cz>
using information from several people, including:
- Avery Pennraun <apenwarr@worldvisions.ca>
- Stephen A. Wood <saw@hallc1.cebaf.gov>
- John Paul Morrison <jmorriso@bogomips.ee.ubc.ca>
- Joachim Koenig <jojo@repas.de>
and Avery touched it up a bit, at Vojtech’s request.
ARCnet (the classic 2.5 Mbps version) can be connected by two differenttypes of cabling: coax and twisted pair. The other ARCnet-type networks(100 Mbps TCNS and 320 kbps - 32 Mbps ARCnet Plus) use different types ofcabling (Type1, Fiber, C1, C4, C5).
For a coax network, you “should” use 93 Ohm RG-62 cable. But other cablesalso work fine, because ARCnet is a very stable network. I personally use 75Ohm TV antenna cable.
Cards for coax cabling are shipped in two different variants: for BUS andSTAR network topologies. They are mostly the same. The only differencelies in the hybrid chip installed. BUS cards use high impedance output,while STAR use low impedance. Low impedance card (STAR) is electricallyequal to a high impedance one with a terminator installed.
Usually, the ARCnet networks are built up from STAR cards and hubs. Thereare two types of hubs - active and passive. Passive hubs are small boxeswith four BNC connectors containing four 47 Ohm resistors:
| | wires R + junction-R-+-R- R 47 Ohm resistors R |
The shielding is connected together. Active hubs are much more complicated;they are powered and contain electronics to amplify the signal and send itto other segments of the net. They usually have eight connectors. Activehubs come in two variants - dumb and smart. The dumb variant justamplifies, but the smart one decodes to digital and encodes back all packetscoming through. This is much better if you have several hubs in the net,since many dumb active hubs may worsen the signal quality.
And now to the cabling. What you can connect together:
A card to a card. This is the simplest way of creating a 2-computernetwork.
A card to a passive hub. Remember that all unused connectors on the hubmust be properly terminated with 93 Ohm (or something else if you don’thave the right ones) terminators.
(Avery’s note: oops, I didn’t know that. Mine (TV cable) worksanyway, though.)
A card to an active hub. Here is no need to terminate the unusedconnectors except some kind of aesthetic feeling. But, there may not bemore than eleven active hubs between any two computers. That of coursedoesn’t limit the number of active hubs on the network.
An active hub to another.
An active hub to passive hub.
Remember that you cannot connect two passive hubs together. The power lossimplied by such a connection is too high for the net to operate reliably.
An example of a typical ARCnet network:
R S - STAR type cardS------H--------A-------S R - Terminator | | H - Hub | | A - Active hub | S----H----S S | | S
The BUS topology is very similar to the one used by Ethernet. The onlydifference is in cable and terminators: they should be 93 Ohm. Ethernetuses 50 Ohm impedance. You use T connectors to put the computers on a singleline of cable, the bus. You have to put terminators at both ends of thecable. A typical BUS ARCnet network looks like:
RT----T------T------T------T------TR B B B B B BB - BUS type cardR - TerminatorT - T connector
But that is not all! The two types can be connected together. According tothe official documentation the only way of connecting them is using an activehub:
A------T------T------TR | B B BS---H---S | S
The official docs also state that you can use STAR cards at the ends ofBUS network in place of a BUS card and a terminator:
S------T------T------S B B
But, according to my own experiments, you can simply hang a BUS type cardanywhere in middle of a cable in a STAR topology network. And more - youcan use the bus card in place of any star card if you use a terminator. Thenyou can build very complicated networks fulfilling all your needs! Anexample:
S | RT------T-------T------H------S B B B | | RS------A------T-------T-------A-------H------TR | B B | | B | S BT | | | | S----A-----SS------H---A----S | | | | S------T----H---S | S S B R S
A basically different cabling scheme is used with Twisted Pair cabling. Eachof the TP cards has two RJ (phone-cord style) connectors. The cards arethen daisy-chained together using a cable connecting every two neighboringcards. The ends are terminated with RJ 93 Ohm terminators which plug intothe empty connectors of cards on the ends of the chain. An example:
___________ ___________ _R_|_ _|_|_ _|_R_| | | | | ||Card | |Card | |Card ||_____| |_____| |_____|
There are also hubs for the TP topology. There is nothing difficultinvolved in using them; you just connect a TP chain to a hub on any end oreven at both. This way you can create almost any network configuration.The maximum of 11 hubs between any two computers on the net applies here aswell. An example:
RP-------P--------P--------H-----P------P-----PR | RP-----H--------P--------H-----P------PR | | PR PRR - RJ TerminatorP - TP CardH - TP Hub
Like any network, ARCnet has a limited cable length. These are the maximumcable lengths between two active ends (an active end being an active hub ora STAR card).
RG-62 93 Ohm up to 650 m RG-59/U 75 Ohm up to 457 m RG-11/U 75 Ohm up to 533 m IBM Type 1 150 Ohm up to 200 m IBM Type 3 100 Ohm up to 100 m
The maximum length of all cables connected to a passive hub is limited to 65meters for RG-62 cabling; less for others. You can see that using passivehubs in a large network is a bad idea. The maximum length of a single “BUSTrunk” is about 300 meters for RG-62. The maximum distance between the twomost distant points of the net is limited to 3000 meters. The maximum lengthof a TP cable between two cards/hubs is 650 meters.
Setting the Jumpers¶
All ARCnet cards should have a total of four or five different settings:
the I/O address: this is the “port” your ARCnet card is on. Probedvalues in the Linux ARCnet driver are only from 0x200 through 0x3F0. (Ifyour card has additional ones, which is possible, please tell me.) Thisshould not be the same as any other device on your system. According toa doc I got from Novell, MS Windows prefers values of 0x300 or more,eating net connections on my system (at least) otherwise. My guess isthis may be because, if your card is at 0x2E0, probing for a serial portat 0x2E8 will reset the card and probably mess things up royally.
- Avery’s favourite: 0x300.
- the IRQ: on 8-bit cards, it might be 2 (9), 3, 4, 5, or 7.
on 16-bit cards, it might be 2 (9), 3, 4, 5, 7, or 10-15.
Make sure this is different from any other card on your system. Notethat IRQ2 is the same as IRQ9, as far as Linux is concerned. You can“cat /proc/interrupts” for a somewhat complete list of which ones are inuse at any given time. Here is a list of common usages from VojtechPavlik <vojtech@suse.cz>:
(“Not on bus” means there is no way for a card to generate thisinterrupt)
IRQ 0 Timer 0 (Not on bus) IRQ 1 Keyboard (Not on bus) IRQ 2 IRQ Controller 2 (Not on bus, nor does interrupt the CPU) IRQ 3 COM2 IRQ 4 COM1 IRQ 5 FREE (LPT2 if you have it; sometimes COM3; maybe PLIP) IRQ 6 Floppy disk controller IRQ 7 FREE (LPT1 if you don’t use the polling driver; PLIP) IRQ 8 Realtime Clock Interrupt (Not on bus) IRQ 9 FREE (VGA vertical sync interrupt if enabled) IRQ 10 FREE IRQ 11 FREE IRQ 12 FREE IRQ 13 Numeric Coprocessor (Not on bus) IRQ 14 Fixed Disk Controller IRQ 15 FREE (Fixed Disk Controller 2 if you have it) Note
IRQ 9 is used on some video cards for the “vertical retrace”interrupt. This interrupt would have been handy for things likevideo games, as it occurs exactly once per screen refresh, butunfortunately IBM cancelled this feature starting with the originalVGA and thus many VGA/SVGA cards do not support it. For thisreason, no modern software uses this interrupt and it can almostalways be safely disabled, if your video card supports it at all.
If your card for some reason CANNOT disable this IRQ (usually thereis a jumper), one solution would be to clip the printed circuitcontact on the board: it’s the fourth contact from the left on theback side. I take no responsibility if you try this.
- Avery’s favourite: IRQ2 (actually IRQ9). Watch that VGA, though.
the memory address: Unlike most cards, ARCnets use “shared memory” forcopying buffers around. Make SURE it doesn’t conflict with any otherused memory in your system!
A0000 - VGA graphics memory (ok if you don't have VGA)B0000 - Monochrome text modeC0000 \ One of these is your VGA BIOS - usually C0000.E0000 /F0000 - System BIOSAnything less than 0xA0000 is, well, a BAD idea since it isn’t above640k.
- Avery’s favourite: 0xD0000
the station address: Every ARCnet card has its own “unique” networkaddress from 0 to 255. Unlike Ethernet, you can set this addressyourself with a jumper or switch (or on some cards, with specialsoftware). Since it’s only 8 bits, you can only have 254 ARCnet cardson a network. DON’T use 0 or 255, since these are reserved (althoughneat stuff will probably happen if you DO use them). By the way, if youhaven’t already guessed, don’t set this the same as any other ARCnet onyour network!
- Avery’s favourite: 3 and 4. Not that it matters.
There may be ETS1 and ETS2 settings. These may or may not make adifference on your card (many manuals call them “reserved”), but areused to change the delays used when powering up a computer on thenetwork. This is only necessary when wiring VERY long range ARCnetnetworks, on the order of 4km or so; in any case, the only realrequirement here is that all cards on the network with ETS1 and ETS2jumpers have them in the same position. Chris Hindy <chrish@io.org>sent in a chart with actual values for this:
ET1 ET2 Response Time Reconfiguration Time open open 74.7us 840us open closed 283.4us 1680us closed open 561.8us 1680us closed closed 1118.6us 1680us Make sure you set ETS1 and ETS2 to the SAME VALUE for all cards on yournetwork.
Also, on many cards (not mine, though) there are red and green LED’s.Vojtech Pavlik <vojtech@suse.cz> tells me this is what they mean:
GREEN RED Status OFF OFF Power off OFF Short flashes Cabling problems (broken cable or notterminated) OFF (short) ON Card init ON ON Normal state - everything OK, nothinghappens ON Long flashes Data transfer ON OFF Never happens (maybe when wrong ID)
The following is all the specific information people have sent me abouttheir own particular ARCnet cards. It is officially a mess, and containshuge amounts of duplicated information. I have no time to fix it. If youwant to, PLEASE DO! Just send me a ‘diff -u’ of all your changes.
The model # is listed right above specifics for that card, so you should beable to use your text viewer’s “search” function to find the entry you want.If you don’t KNOW what kind of card you have, try looking through thevarious diagrams to see if you can tell.
If your model isn’t listed and/or has different settings, PLEASE PLEASEtell me. I had to figure mine out without the manual, and it WASN’T FUN!
Even if your ARCnet model isn’t listed, but has the same jumpers as anothermodel that is, please e-mail me to say so.
Cards Listed in this file (in this order, mostly):
Manufacturer Model # Bits SMC PC100 8 SMC PC110 8 SMC PC120 8 SMC PC130 8 SMC PC270E 8 SMC PC500 16 SMC PC500Longboard 16 SMC PC550Longboard 16 SMC PC600 16 SMC PC710 8 SMC? LCS-8830(-T) 8/16 Puredata PDI507 8 CNet Tech CN120-Series 8 CNet Tech CN160-Series 16 Lantech? UM9065L chipset 8 Acer 5210-003 8 Datapoint? LAN-ARC-8 8 Topware TA-ARC/10 8 Thomas-Conrad 500-6242-0097 REV A 8 Waterloo? (C)1985 Waterloo Micro. 8 No Name – 8/16 No Name Taiwan R.O.C? 8 No Name Model 9058 8 Tiara Tiara Lancard? 8
- SMC = Standard Microsystems Corp.
- CNet Tech = CNet Technology, Inc.
Unclassified Stuff¶
Please send any other information you can find.
And some other stuff (more info is welcome!):
From: root@ultraworld.xs4all.nl (Timo Hilbrink)To: apenwarr@foxnet.net (Avery Pennarun)Date: Wed, 26 Oct 1994 02:10:32 +0000 (GMT)Reply-To: timoh@xs4all.nl[...parts deleted...]About the jumpers: On my PC130 there is one more jumper, located near thecable-connector and it's for changing to star or bus topology;closed: star - open: busOn the PC500 are some more jumper-pins, one block labeled with RX,PDN,TXIand another with ALE,LA17,LA18,LA19 these are undocumented..[...more parts deleted...]--- CUT ---
Standard Microsystems Corp (SMC)¶
PC100, PC110, PC120, PC130 (8-bit cards) and PC500, PC600 (16-bit cards)¶
- mainly from Avery Pennarun <apenwarr@worldvisions.ca>. Values depictedare from Avery’s setup.
- special thanks to Timo Hilbrink <timoh@xs4all.nl> for noting that PC120,130, 500, and 600 all have the same switches as Avery’s PC100.PC500/600 have several extra, undocumented pins though. (?)
- PC110 settings were verified by Stephen A. Wood <saw@cebaf.gov>
- Also, the JP- and S-numbers probably don’t match your card exactly. Tryto find jumpers/switches with the same number of settings - it’sprobably more reliable.
JP5 [|] : : : :(IRQ Setting) IRQ2 IRQ3 IRQ4 IRQ5 IRQ7 Put exactly one jumper on exactly one set of pins. 1 2 3 4 5 6 7 8 9 10 S1 /----------------------------------\(I/O and Memory | 1 1 * 0 0 0 0 * 1 1 0 1 | addresses) \----------------------------------/ |--| |--------| |--------| (a) (b) (m) WARNING. It's very important when setting these which way you're holding the card, and which way you think is '1'! If you suspect that your settings are not being made correctly, try reversing the direction or inverting the switch positions. a: The first digit of the I/O address. Setting Value ------- ----- 00 0 01 1 10 2 11 3 b: The second digit of the I/O address. Setting Value ------- ----- 0000 0 0001 1 0010 2 ... ... 1110 E 1111 F The I/O address is in the form ab0. For example, if a is 0x2 and b is 0xE, the address will be 0x2E0. DO NOT SET THIS LESS THAN 0x200!!!!! m: The first digit of the memory address. Setting Value ------- ----- 0000 0 0001 1 0010 2 ... ... 1110 E 1111 F The memory address is in the form m0000. For example, if m is D, the address will be 0xD0000. DO NOT SET THIS TO C0000, F0000, OR LESS THAN A0000! 1 2 3 4 5 6 7 8 S2 /--------------------------\(Station Address) | 1 1 0 0 0 0 0 0 | \--------------------------/ Setting Value ------- ----- 00000000 00 10000000 01 01000000 02 ... 01111111 FE 11111111 FF Note that this is binary with the digits reversed! DO NOT SET THIS TO 0 OR 255 (0xFF)!
PC130E/PC270E (8-bit cards)¶
- from Juergen Seifert <seifert@htwm.de>
This description has been written by Juergen Seifert <seifert@htwm.de>using information from the following Original SMC Manual
“Configuration Guide for ARCNET(R)-PC130E/PC270 NetworkController Boards Pub. # 900.044A June, 1989”
ARCNET is a registered trademark of the Datapoint CorporationSMC is a registered trademark of the Standard Microsystems Corporation
The PC130E is an enhanced version of the PC130 board, is equipped with astandard BNC female connector for connection to RG-62/U coax cable.Since this board is designed both for point-to-point connection in starnetworks and for connection to bus networks, it is downwardly compatiblewith all the other standard boards designed for coax networks (that is,the PC120, PC110 and PC100 star topology boards and the PC220, PC210 andPC200 bus topology boards).
The PC270E is an enhanced version of the PC260 board, is equipped with twomodular RJ11-type jacks for connection to twisted pair wiring.It can be used in a star or a daisy-chained network.
8 7 6 5 4 3 2 1 ________________________________________________________________| | S1 | || |_________________| || Offs|Base |I/O Addr || RAM Addr | ___|| ___ ___ CR3 |___|| | \/ | CR4 |___|| | PROM | ___|| | | N | | 8| | SOCKET | o | | 7| |________| d | | 6| ___________________ e | | 5| | | A | S | 4| |oo| EXT2 | | d | 2 | 3| |oo| EXT1 | SMC | d | | 2| |oo| ROM | 90C63 | r |___| 1| |oo| IRQ7 | | |o| _____|| |oo| IRQ5 | | |o| | J1 || |oo| IRQ4 | | STAR |_____|| |oo| IRQ3 | | | J2 || |oo| IRQ2 |___________________| |_____||___ ______________| | | |_____________________________________________|
Legend:
SMC 90C63 ARCNET Controller / Transceiver /LogicS1 1-3: I/O Base Address Select 4-6: Memory Base Address Select 7-8: RAM Offset SelectS2 1-8: Node ID SelectEXT Extended Timeout SelectROM ROM Enable SelectSTAR Selected - Star Topology (PC130E only) Deselected - Bus Topology (PC130E only)CR3/CR4 Diagnostic LEDsJ1 BNC RG62/U Connector (PC130E only)J1 6-position Telephone Jack (PC270E only)J2 6-position Telephone Jack (PC270E only)
Setting one of the switches to Off/Open means “1”, On/Closed means “0”.
Setting the Node ID¶
The eight switches in group S2 are used to set the node ID.These switches work in a way similar to the PC100-series cards; see thatentry for more information.
Setting the I/O Base Address¶
The first three switches in switch group S1 are used to select oneof eight possible I/O Base addresses using the following table:
Switch | Hex I/O1 2 3 | Address-------|--------0 0 0 | 2600 0 1 | 2900 1 0 | 2E0 (Manufacturer's default)0 1 1 | 2F01 0 0 | 3001 0 1 | 3501 1 0 | 3801 1 1 | 3E0
Setting the Base Memory (RAM) buffer Address¶
The memory buffer requires 2K of a 16K block of RAM. The base of this16K block can be located in any of eight positions.Switches 4-6 of switch group S1 select the Base of the 16K block.Within that 16K address space, the buffer may be assigned any one of fourpositions, determined by the offset, switches 7 and 8 of group S1.
Switch | Hex RAM | Hex ROM 4 5 6 7 8 | Address | Address *) -----------|---------|----------- 0 0 0 0 0 | C0000 | C2000 0 0 0 0 1 | C0800 | C2000 0 0 0 1 0 | C1000 | C2000 0 0 0 1 1 | C1800 | C2000 | | 0 0 1 0 0 | C4000 | C6000 0 0 1 0 1 | C4800 | C6000 0 0 1 1 0 | C5000 | C6000 0 0 1 1 1 | C5800 | C6000 | | 0 1 0 0 0 | CC000 | CE000 0 1 0 0 1 | CC800 | CE000 0 1 0 1 0 | CD000 | CE000 0 1 0 1 1 | CD800 | CE000 | | 0 1 1 0 0 | D0000 | D2000 (Manufacturer's default) 0 1 1 0 1 | D0800 | D2000 0 1 1 1 0 | D1000 | D2000 0 1 1 1 1 | D1800 | D2000 | | 1 0 0 0 0 | D4000 | D6000 1 0 0 0 1 | D4800 | D6000 1 0 0 1 0 | D5000 | D6000 1 0 0 1 1 | D5800 | D6000 | | 1 0 1 0 0 | D8000 | DA000 1 0 1 0 1 | D8800 | DA000 1 0 1 1 0 | D9000 | DA000 1 0 1 1 1 | D9800 | DA000 | | 1 1 0 0 0 | DC000 | DE000 1 1 0 0 1 | DC800 | DE000 1 1 0 1 0 | DD000 | DE000 1 1 0 1 1 | DD800 | DE000 | | 1 1 1 0 0 | E0000 | E2000 1 1 1 0 1 | E0800 | E2000 1 1 1 1 0 | E1000 | E2000 1 1 1 1 1 | E1800 | E2000*) To enable the 8K Boot PROM install the jumper ROM. The default is jumper ROM not installed.
Setting the Timeouts and Interrupt¶
The jumpers labeled EXT1 and EXT2 are used to determine the timeoutparameters. These two jumpers are normally left open.
To select a hardware interrupt level set one (only one!) of the jumpersIRQ2, IRQ3, IRQ4, IRQ5, IRQ7. The Manufacturer’s default is IRQ2.
Configuring the PC130E for Star or Bus Topology¶
The single jumper labeled STAR is used to configure the PC130E board forstar or bus topology.When the jumper is installed, the board may be used in a star network, whenit is removed, the board can be used in a bus topology.
Diagnostic LEDs¶
Two diagnostic LEDs are visible on the rear bracket of the board.The green LED monitors the network activity: the red one shows theboard activity:
Green | Status Red | Status-------|------------------- ---------|------------------- on | normal activity flash/on | data transfer blink | reconfiguration off | no data transfer; off | defective board or | incorrect memory or | node ID is zero | I/O address
PC500/PC550 Longboard (16-bit cards)¶
- from Juergen Seifert <seifert@htwm.de>
Note
There is another Version of the PC500 called Short Version, whichis different in hard- and software! The most important differencesare:
- The long board has no Shared memory.
- On the long board the selection of the interrupt is done by binarycoded switch, on the short board directly by jumper.
[Avery’s note: pay special attention to that: the long board HAS NO SHAREDMEMORY. This means the current Linux-ARCnet driver can’t use these cards.I have obtained a PC500Longboard and will be doing some experiments on it inthe future, but don’t hold your breath. Thanks again to Juergen Seifert forhis advice about this!]
This description has been written by Juergen Seifert <seifert@htwm.de>using information from the following Original SMC Manual
“Configuration Guide for SMC ARCNET-PC500/PC550Series Network Controller Boards Pub. # 900.033 Rev. ANovember, 1989”
ARCNET is a registered trademark of the Datapoint CorporationSMC is a registered trademark of the Standard Microsystems Corporation
The PC500 is equipped with a standard BNC female connector for connectionto RG-62/U coax cable.The board is designed both for point-to-point connection in star networksand for connection to bus networks.
The PC550 is equipped with two modular RJ11-type jacks for connectionto twisted pair wiring.It can be used in a star or a daisy-chained (BUS) network.
1 0 9 8 7 6 5 4 3 2 1 6 5 4 3 2 1 ____________________________________________________________________< | SW1 | | SW2 | |> |_____________________| |_____________| |< IRQ |I/O Addr |> ___|< CR4 |___|> CR3 |___|< ___|> N | | 8< o | | 7> d | S | 6< e | W | 5> A | 3 | 4< d | | 3> d | | 2< r |___| 1> |o| _____|< |o| | J1 |> 3 1 JP6 |_____|< |o|o| JP2 | J2 |> |o|o| |_____|< 4 2__ ______________|> | | |<____| |_____________________________________________|
Legend:
SW1 1-6: I/O Base Address Select 7-10: Interrupt SelectSW2 1-6: Reserved for Future UseSW3 1-8: Node ID SelectJP2 1-4: Extended Timeout SelectJP6 Selected - Star Topology (PC500 only) Deselected - Bus Topology (PC500 only)CR3 Green Monitors Network ActivityCR4 Red Monitors Board ActivityJ1 BNC RG62/U Connector (PC500 only)J1 6-position Telephone Jack (PC550 only)J2 6-position Telephone Jack (PC550 only)
Setting one of the switches to Off/Open means “1”, On/Closed means “0”.
Setting the Node ID¶
The eight switches in group SW3 are used to set the node ID. Each nodeattached to the network must have an unique node ID which must bedifferent from 0.Switch 1 serves as the least significant bit (LSB).
The node ID is the sum of the values of all switches set to “1”These values are:
Switch | Value-------|------- 1 | 1 2 | 2 3 | 4 4 | 8 5 | 16 6 | 32 7 | 64 8 | 128
Some Examples:
Switch | Hex | Decimal8 7 6 5 4 3 2 1 | Node ID | Node ID----------------|---------|---------0 0 0 0 0 0 0 0 | not allowed0 0 0 0 0 0 0 1 | 1 | 10 0 0 0 0 0 1 0 | 2 | 20 0 0 0 0 0 1 1 | 3 | 3 . . . | |0 1 0 1 0 1 0 1 | 55 | 85 . . . | |1 0 1 0 1 0 1 0 | AA | 170 . . . | |1 1 1 1 1 1 0 1 | FD | 2531 1 1 1 1 1 1 0 | FE | 2541 1 1 1 1 1 1 1 | FF | 255
Setting the I/O Base Address¶
The first six switches in switch group SW1 are used to select oneof 32 possible I/O Base addresses using the following table:
Switch | Hex I/O6 5 4 3 2 1 | Address-------------|--------0 1 0 0 0 0 | 2000 1 0 0 0 1 | 2100 1 0 0 1 0 | 2200 1 0 0 1 1 | 2300 1 0 1 0 0 | 2400 1 0 1 0 1 | 2500 1 0 1 1 0 | 2600 1 0 1 1 1 | 2700 1 1 0 0 0 | 2800 1 1 0 0 1 | 2900 1 1 0 1 0 | 2A00 1 1 0 1 1 | 2B00 1 1 1 0 0 | 2C00 1 1 1 0 1 | 2D00 1 1 1 1 0 | 2E0 (Manufacturer's default)0 1 1 1 1 1 | 2F01 1 0 0 0 0 | 3001 1 0 0 0 1 | 3101 1 0 0 1 0 | 3201 1 0 0 1 1 | 3301 1 0 1 0 0 | 3401 1 0 1 0 1 | 3501 1 0 1 1 0 | 3601 1 0 1 1 1 | 3701 1 1 0 0 0 | 3801 1 1 0 0 1 | 3901 1 1 0 1 0 | 3A01 1 1 0 1 1 | 3B01 1 1 1 0 0 | 3C01 1 1 1 0 1 | 3D01 1 1 1 1 0 | 3E01 1 1 1 1 1 | 3F0
Setting the Interrupt¶
Switches seven through ten of switch group SW1 are used to select theinterrupt level. The interrupt level is binary coded, so selectionsfrom 0 to 15 would be possible, but only the following eight values willbe supported: 3, 4, 5, 7, 9, 10, 11, 12.
Switch | IRQ10 9 8 7 |---------|-------- 0 0 1 1 | 3 0 1 0 0 | 4 0 1 0 1 | 5 0 1 1 1 | 7 1 0 0 1 | 9 (=2) (default) 1 0 1 0 | 10 1 0 1 1 | 11 1 1 0 0 | 12
Setting the Timeouts¶
The two jumpers JP2 (1-4) are used to determine the timeout parameters.These two jumpers are normally left open.Refer to the COM9026 Data Sheet for alternate configurations.
Configuring the PC500 for Star or Bus Topology¶
The single jumper labeled JP6 is used to configure the PC500 board forstar or bus topology.When the jumper is installed, the board may be used in a star network, whenit is removed, the board can be used in a bus topology.
Diagnostic LEDs¶
Two diagnostic LEDs are visible on the rear bracket of the board.The green LED monitors the network activity: the red one shows theboard activity:
Green | Status Red | Status-------|------------------- ---------|------------------- on | normal activity flash/on | data transfer blink | reconfiguration off | no data transfer; off | defective board or | incorrect memory or | node ID is zero | I/O address
PC710 (8-bit card)¶
- from J.S. van Oosten <jvoosten@compiler.tdcnet.nl>
Note: this data is gathered by experimenting and looking at info of othercards. However, I’m sure I got 99% of the settings right.
The SMC710 card resembles the PC270 card, but is much more basic (i.e. noLEDs, RJ11 jacks, etc.) and 8 bit. Here’s a little drawing:
_______________________________________| +---------+ +---------+ |____| | S2 | | S1 | || +---------+ +---------+ || || +===+ __ || | R | | | X-tal ###___| | O | |__| ####__'|| | M | || ###| +===+ || || .. JP1 +----------+ || .. | big chip | || .. | 90C63 | || .. | | || .. +----------+ | ------- ----------- |||||||||||||||||||||
The row of jumpers at JP1 actually consists of 8 jumpers, (sometimeslabelled) the same as on the PC270, from top to bottom: EXT2, EXT1, ROM,IRQ7, IRQ5, IRQ4, IRQ3, IRQ2 (gee, wonder what they would do? :-) )
S1 and S2 perform the same function as on the PC270, only their numbersare swapped (S1 is the nodeaddress, S2 sets IO- and RAM-address).
I know it works when connected to a PC110 type ARCnet board.
Possibly SMC¶
LCS-8830(-T) (8 and 16-bit cards)¶
- from Mathias Katzer <mkatzer@HRZ.Uni-Bielefeld.DE>
- Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl> says theLCS-8830 is slightly different from LCS-8830-T. These are 8 bit, BUSonly (the JP0 jumper is hardwired), and BNC only.
This is a LCS-8830-T made by SMC, I think (‘SMC’ only appears on one PLCC,nowhere else, not even on the few Xeroxed sheets from the manual).
SMC ARCnet Board Type LCS-8830-T:
------------------------------------ | | | JP3 88 8 JP2 | | ##### | \ | | ##### ET1 ET2 ###| | 8 ###| | U3 SW 1 JP0 ###| Phone Jacks | -- ###| | | | | | | | SW2 | | | | | | | | ##### | | -- ##### #### BNC Connector | #### | 888888 JP1 | | 234567 | -- ------- ||||||||||||||||||||||||||| --------------------------SW1: DIP-Switches for Station AddressSW2: DIP-Switches for Memory Base and I/O Base addressesJP0: If closed, internal termination on (default open)JP1: IRQ JumpersJP2: Boot-ROM enabled if closedJP3: Jumpers for response timeoutU3: Boot-ROM SocketET1 ET2 Response Time Idle Time Reconfiguration Time 78 86 840 X 285 316 1680 X 563 624 1680 X X 1130 1237 1680(X means closed jumper)(DIP-Switch downwards means "0")
The station address is binary-coded with SW1.
The I/O base address is coded with DIP-Switches 6,7 and 8 of SW2:
| Switches | Base |
|---|---|
| 678 | Address |
| 000 | 260-26f |
| 100 | 290-29f |
| 010 | 2e0-2ef |
| 110 | 2f0-2ff |
| 001 | 300-30f |
| 101 | 350-35f |
| 011 | 380-38f |
| 111 | 3e0-3ef |
DIP Switches 1-5 of SW2 encode the RAM and ROM Address Range:
| Switches | RAM | ROM |
|---|---|---|
| 12345 | Address Range | Address Range |
| 00000 | C:0000-C:07ff | C:2000-C:3fff |
| 10000 | C:0800-C:0fff | |
| 01000 | C:1000-C:17ff | |
| 11000 | C:1800-C:1fff | |
| 00100 | C:4000-C:47ff | C:6000-C:7fff |
| 10100 | C:4800-C:4fff | |
| 01100 | C:5000-C:57ff | |
| 11100 | C:5800-C:5fff | |
| 00010 | C:C000-C:C7ff | C:E000-C:ffff |
| 10010 | C:C800-C:Cfff | |
| 01010 | C:D000-C:D7ff | |
| 11010 | C:D800-C:Dfff | |
| 00110 | D:0000-D:07ff | D:2000-D:3fff |
| 10110 | D:0800-D:0fff | |
| 01110 | D:1000-D:17ff | |
| 11110 | D:1800-D:1fff | |
| 00001 | D:4000-D:47ff | D:6000-D:7fff |
| 10001 | D:4800-D:4fff | |
| 01001 | D:5000-D:57ff | |
| 11001 | D:5800-D:5fff | |
| 00101 | D:8000-D:87ff | D:A000-D:bfff |
| 10101 | D:8800-D:8fff | |
| 01101 | D:9000-D:97ff | |
| 11101 | D:9800-D:9fff | |
| 00011 | D:C000-D:c7ff | D:E000-D:ffff |
| 10011 | D:C800-D:cfff | |
| 01011 | D:D000-D:d7ff | |
| 11011 | D:D800-D:dfff | |
| 00111 | E:0000-E:07ff | E:2000-E:3fff |
| 10111 | E:0800-E:0fff | |
| 01111 | E:1000-E:17ff | |
| 11111 | E:1800-E:1fff |
PureData Corp¶
PDI507 (8-bit card)¶
- from Mark Rejhon <mdrejhon@magi.com> (slight modifications by Avery)
- Avery’s note: I think PDI508 cards (but definitely NOT PDI508Plus cards)are mostly the same as this. PDI508Plus cards appear to be mainlysoftware-configured.
Jumpers:
There is a jumper array at the bottom of the card, near the edgeconnector. This array is labelled J1. They control the IRQs andsomething else. Put only one jumper on the IRQ pins.
ETS1, ETS2 are for timing on very long distance networks. See themore general information near the top of this file.
There is a J2 jumper on two pins. A jumper should be put on them,since it was already there when I got the card. I don’t know whatthis jumper is for though.
There is a two-jumper array for J3. I don’t know what it is for,but there were already two jumpers on it when I got the card. It’sa six pin grid in a two-by-three fashion. The jumpers wereconfigured as follows:
.-------.o | o o | :-------: ------> Accessible end of card with connectorso | o o | in this direction -------> `-------'
Carl de Billy <CARL@carainfo.com> explains J3 and J4:
J3 Diagram:
.-------.o | o o | :-------: TWIST Technologyo | o o | `-------' .-------. | o o | o :-------: COAX Technology | o o | o `-------'
- If using coax cable in a bus topology the J4 jumper must be removed;place it on one pin.
- If using bus topology with twisted pair wiring move the J3jumpers so they connect the middle pin and the pins closest to the RJ11Connectors. Also the J4 jumper must be removed; place it on one pin ofJ4 jumper for storage.
- If using star topology with twisted pair wiring move the J3jumpers so they connect the middle pin and the pins closest to the RJ11connectors.
DIP Switches:
The DIP switches accessible on the accessible end of the card whileit is installed, is used to set the ARCnet address. There are 8switches. Use an address from 1 to 254
Switch No. ARCnet address 12345678 00000000 FF (Don’t use this!) 00000001 FE 00000010 FD … 11111101 2 11111110 1 11111111 0 (Don’t use this!) There is another array of eight DIP switches at the top of thecard. There are five labelled MS0-MS4 which seem to control thememory address, and another three labelled IO0-IO2 which seem tocontrol the base I/O address of the card.
This was difficult to test by trial and error, and the I/O addressesare in a weird order. This was tested by setting the DIP switches,rebooting the computer, and attempting to load ARCETHER at variousaddresses (mostly between 0x200 and 0x400). The address that causedthe red transmit LED to blink, is the one that I thought works.
Also, the address 0x3D0 seem to have a special meaning, since theARCETHER packet driver loaded fine, but without the red LEDblinking. I don’t know what 0x3D0 is for though. I recommend usingan address of 0x300 since Windows may not like addresses below0x300.
IO Switch No. I/O address 210 111 0x260 110 0x290 101 0x2E0 100 0x2F0 011 0x300 010 0x350 001 0x380 000 0x3E0 The memory switches set a reserved address space of 0x1000 bytes(0x100 segment units, or 4k). For example if I set an address of0xD000, it will use up addresses 0xD000 to 0xD100.
The memory switches were tested by booting using QEMM386 stealth,and using LOADHI to see what address automatically became excludedfrom the upper memory regions, and then attempting to load ARCETHERusing these addresses.
I recommend using an ARCnet memory address of 0xD000, and puttingthe EMS page frame at 0xC000 while using QEMM stealth mode. Thatway, you get contiguous high memory from 0xD100 almost all the waythe end of the megabyte.
Memory Switch 0 (MS0) didn’t seem to work properly when set to OFFon my card. It could be malfunctioning on my card. Experiment withit ON first, and if it doesn’t work, set it to OFF. (It may be amodifier for the 0x200 bit?)
MS Switch No. 43210 Memory address 00001 0xE100 (guessed - was not detected by QEMM) 00011 0xE000 (guessed - was not detected by QEMM) 00101 0xDD00 00111 0xDC00 01001 0xD900 01011 0xD800 01101 0xD500 01111 0xD400 10001 0xD100 10011 0xD000 10101 0xCD00 10111 0xCC00 11001 0xC900 (guessed - crashes tested system) 11011 0xC800 (guessed - crashes tested system) 11101 0xC500 (guessed - crashes tested system) 11111 0xC400 (guessed - crashes tested system)
CNet Technology Inc. (8-bit cards)¶
120 Series (8-bit cards)¶
- from Juergen Seifert <seifert@htwm.de>
This description has been written by Juergen Seifert <seifert@htwm.de>using information from the following Original CNet Manual
“ARCNET USER’S MANUAL forCN120ACN120ABCN120TPCN120STCN120SBTP/N:12-01-0007Revision 3.00”
ARCNET is a registered trademark of the Datapoint Corporation
- P/N 120A ARCNET 8 bit XT/AT Star
- P/N 120AB ARCNET 8 bit XT/AT Bus
- P/N 120TP ARCNET 8 bit XT/AT Twisted Pair
- P/N 120ST ARCNET 8 bit XT/AT Star, Twisted Pair
- P/N 120SBT ARCNET 8 bit XT/AT Star, Bus, Twisted Pair
__________________________________________________________________| || ___|| LED |___|| ___|| N | | ID7| o | | ID6| d | S | ID5| e | W | ID4| ___________________ A | 2 | ID3| | | d | | ID2| | | 1 2 3 4 5 6 7 8 d | | ID1| | | _________________ r |___| ID0| | 90C65 || SW1 | ____|| JP 8 7 | ||_________________| | || |o|o| JP1 | | | J2 || |o|o| |oo| | | JP 1 1 1 | || ______________ | | 0 1 2 |____|| | PROM | |___________________| |o|o|o| _____|| > SOCKET | JP 6 5 4 3 2 |o|o|o| | J1 || |______________| |o|o|o|o|o| |o|o|o| |_____||_____ |o|o|o|o|o| ______________| | | |_____________________________________________|
Legend:
90C65 ARCNET ProbeS1 1-5: Base Memory Address Select 6-8: Base I/O Address SelectS2 1-8: Node ID Select (ID0-ID7)JP1 ROM Enable SelectJP2 IRQ2JP3 IRQ3JP4 IRQ4JP5 IRQ5JP6 IRQ7JP7/JP8 ET1, ET2 Timeout ParametersJP10/JP11 Coax / Twisted Pair Select (CN120ST/SBT only)JP12 Terminator Select (CN120AB/ST/SBT only)J1 BNC RG62/U Connector (all except CN120TP)J2 Two 6-position Telephone Jack (CN120TP/ST/SBT only)
Setting one of the switches to Off means “1”, On means “0”.
Setting the Node ID¶
The eight switches in SW2 are used to set the node ID. Each node attachedto the network must have an unique node ID which must be different from 0.Switch 1 (ID0) serves as the least significant bit (LSB).
The node ID is the sum of the values of all switches set to “1”These values are:
Switch Label Value 1 ID0 1 2 ID1 2 3 ID2 4 4 ID3 8 5 ID4 16 6 ID5 32 7 ID6 64 8 ID7 128
Some Examples:
Switch | Hex | Decimal8 7 6 5 4 3 2 1 | Node ID | Node ID----------------|---------|---------0 0 0 0 0 0 0 0 | not allowed0 0 0 0 0 0 0 1 | 1 | 10 0 0 0 0 0 1 0 | 2 | 20 0 0 0 0 0 1 1 | 3 | 3 . . . | |0 1 0 1 0 1 0 1 | 55 | 85 . . . | |1 0 1 0 1 0 1 0 | AA | 170 . . . | |1 1 1 1 1 1 0 1 | FD | 2531 1 1 1 1 1 1 0 | FE | 2541 1 1 1 1 1 1 1 | FF | 255
Setting the I/O Base Address¶
The last three switches in switch block SW1 are used to select oneof eight possible I/O Base addresses using the following table:
Switch | Hex I/O 6 7 8 | Address------------|--------ON ON ON | 260OFF ON ON | 290ON OFF ON | 2E0 (Manufacturer's default)OFF OFF ON | 2F0ON ON OFF | 300OFF ON OFF | 350ON OFF OFF | 380OFF OFF OFF | 3E0
Setting the Base Memory (RAM) buffer Address¶
The memory buffer (RAM) requires 2K. The base of this buffer can belocated in any of eight positions. The address of the Boot Prom ismemory base + 8K or memory base + 0x2000.Switches 1-5 of switch block SW1 select the Memory Base address.
Switch | Hex RAM | Hex ROM 1 2 3 4 5 | Address | Address *) --------------------|---------|----------- ON ON ON ON ON | C0000 | C2000 ON ON OFF ON ON | C4000 | C6000 ON ON ON OFF ON | CC000 | CE000 ON ON OFF OFF ON | D0000 | D2000 (Manufacturer's default) ON ON ON ON OFF | D4000 | D6000 ON ON OFF ON OFF | D8000 | DA000 ON ON ON OFF OFF | DC000 | DE000 ON ON OFF OFF OFF | E0000 | E2000*) To enable the Boot ROM install the jumper JP1
Note
Since the switches 1 and 2 are always set to ON it may be possiblethat they can be used to add an offset of 2K, 4K or 6K to the baseaddress, but this feature is not documented in the manual and Ihaven’t tested it yet.
Setting the Interrupt Line¶
To select a hardware interrupt level install one (only one!) of the jumpersJP2, JP3, JP4, JP5, JP6. JP2 is the default:
Jumper | IRQ-------|----- 2 | 2 3 | 3 4 | 4 5 | 5 6 | 7
Setting the Internal Terminator on CN120AB/TP/SBT¶
The jumper JP12 is used to enable the internal terminator:
----- 0 | 0 | ----- ON | | ON | 0 | | 0 | | | OFF ----- OFF | 0 | 0 -----Terminator Terminator disabled enabled
Selecting the Connector Type on CN120ST/SBT¶
JP10 JP11 JP10 JP11 ----- ----- 0 0 | 0 | | 0 | ----- ----- | | | || 0 | | 0 | | 0 | | 0 || | | | ----- -----| 0 | | 0 | 0 0 ----- ----- Coaxial Cable Twisted Pair Cable (Default)
Setting the Timeout Parameters¶
The jumpers labeled EXT1 and EXT2 are used to determine the timeoutparameters. These two jumpers are normally left open.
CNet Technology Inc. (16-bit cards)¶
160 Series (16-bit cards)¶
- from Juergen Seifert <seifert@htwm.de>
This description has been written by Juergen Seifert <seifert@htwm.de>using information from the following Original CNet Manual
“ARCNET USER’S MANUAL forCN160A CN160AB CN160TPP/N:12-01-0006 Revision 3.00”
ARCNET is a registered trademark of the Datapoint Corporation
- P/N 160A ARCNET 16 bit XT/AT Star
- P/N 160AB ARCNET 16 bit XT/AT Bus
- P/N 160TP ARCNET 16 bit XT/AT Twisted Pair
___________________________________________________________________< _________________________ ___|> |oo| JP2 | | LED |___|< |oo| JP1 | 9026 | LED |___|> |_________________________| ___|< N | | ID7> 1 o | | ID6< 1 2 3 4 5 6 7 8 9 0 d | S | ID5> _______________ _____________________ e | W | ID4< | PROM | | SW1 | A | 2 | ID3> > SOCKET | |_____________________| d | | ID2< |_______________| | IO-Base | MEM | d | | ID1> r |___| ID0< ____|> | |< | J1 |> | |< |____|> 1 1 1 1 |< 3 4 5 6 7 JP 8 9 0 1 2 3 |> |o|o|o|o|o| |o|o|o|o|o|o| |< |o|o|o|o|o| __ |o|o|o|o|o|o| ___________|> | | |<____________| |_______________________________________|
Legend:
9026 ARCNET ProbeSW1 1-6: Base I/O Address Select 7-10: Base Memory Address SelectSW2 1-8: Node ID Select (ID0-ID7)JP1/JP2 ET1, ET2 Timeout ParametersJP3-JP13 Interrupt SelectJ1 BNC RG62/U Connector (CN160A/AB only)J1 Two 6-position Telephone Jack (CN160TP only)LED
Setting one of the switches to Off means “1”, On means “0”.
Setting the Node ID¶
The eight switches in SW2 are used to set the node ID. Each node attachedto the network must have an unique node ID which must be different from 0.Switch 1 (ID0) serves as the least significant bit (LSB).
The node ID is the sum of the values of all switches set to “1”These values are:
Switch | Label | Value-------|-------|------- 1 | ID0 | 1 2 | ID1 | 2 3 | ID2 | 4 4 | ID3 | 8 5 | ID4 | 16 6 | ID5 | 32 7 | ID6 | 64 8 | ID7 | 128
Some Examples:
Switch | Hex | Decimal8 7 6 5 4 3 2 1 | Node ID | Node ID----------------|---------|---------0 0 0 0 0 0 0 0 | not allowed0 0 0 0 0 0 0 1 | 1 | 10 0 0 0 0 0 1 0 | 2 | 20 0 0 0 0 0 1 1 | 3 | 3 . . . | |0 1 0 1 0 1 0 1 | 55 | 85 . . . | |1 0 1 0 1 0 1 0 | AA | 170 . . . | |1 1 1 1 1 1 0 1 | FD | 2531 1 1 1 1 1 1 0 | FE | 2541 1 1 1 1 1 1 1 | FF | 255
Setting the I/O Base Address¶
The first six switches in switch block SW1 are used to select the I/O Baseaddress using the following table:
Switch | Hex I/O 1 2 3 4 5 6 | Address------------------------|--------OFF ON ON OFF OFF ON | 260OFF ON OFF ON ON OFF | 290OFF ON OFF OFF OFF ON | 2E0 (Manufacturer's default)OFF ON OFF OFF OFF OFF | 2F0OFF OFF ON ON ON ON | 300OFF OFF ON OFF ON OFF | 350OFF OFF OFF ON ON ON | 380OFF OFF OFF OFF OFF ON | 3E0
- Note: Other IO-Base addresses seem to be selectable, but only the above
- combinations are documented.
Setting the Base Memory (RAM) buffer Address¶
The switches 7-10 of switch block SW1 are used to select the MemoryBase address of the RAM (2K) and the PROM:
Switch | Hex RAM | Hex ROM 7 8 9 10 | Address | Address----------------|---------|-----------OFF OFF ON ON | C0000 | C8000OFF OFF ON OFF | D0000 | D8000 (Default)OFF OFF OFF ON | E0000 | E8000
Note
Other MEM-Base addresses seem to be selectable, but only the abovecombinations are documented.
Setting the Interrupt Line¶
To select a hardware interrupt level install one (only one!) of the jumpersJP3 through JP13 using the following table:
Jumper | IRQ-------|----------------- 3 | 14 4 | 15 5 | 12 6 | 11 7 | 10 8 | 3 9 | 4 10 | 5 11 | 6 12 | 7 13 | 2 (=9) Default!
Note
- Do not use JP11=IRQ6, it may conflict with your Floppy DiskController
- Use JP3=IRQ14 only, if you don’t have an IDE-, MFM-, or RLL-Hard Disk, it may conflict with their controllers
Setting the Timeout Parameters¶
The jumpers labeled JP1 and JP2 are used to determine the timeoutparameters. These two jumpers are normally left open.
Lantech¶
8-bit card, unknown model¶
- from Vlad Lungu <vlungu@ugal.ro> - his e-mail address seemed broken atthe time I tried to reach him. Sorry Vlad, if you didn’t get my reply.
________________________________________________________________| 1 8 || ___________ __|| | SW1 | LED |__|| |__________| || ___|| _____________________ |S | 8| | | |W || | | |2 || | | |__| 1| | UM9065L | |o| JP4 ____|____| | | |o| | CN || | | |________|| | | || |___________________| || || || _____________ || | | || | PROM | |ooooo| JP6 || |____________| |ooooo| ||_____________ _ _| |____________________________________________| |__|
UM9065L : ARCnet Controller
SW 1 : Shared Memory Address and I/O Base
ON=012345|Memory Address-----|--------------00001| D400000010| CC00000110| D000001110| D100001101| D900010010| CC80010011| DC80011110| D1800
It seems that the bits are considered in reverse order. Also, you mustobserve that some of those addresses are unusual and I didn’t probe them; Iused a memory dump in DOS to identify them. For the 00000 configuration andsome others that I didn’t write here the card seems to conflict with thevideo card (an S3 GENDAC). I leave the full decoding of those addresses toyou.
678| I/O Address ---|------------ 000| 260 001| failed probe 010| 2E0 011| 380 100| 290 101| 350 110| failed probe 111| 3E0SW 2 : Node ID (binary coded)JP 4 : Boot PROM enable CLOSE - enabled OPEN - disabledJP 6 : IRQ set (ONLY ONE jumper on 1-5 for IRQ 2-6)
Acer¶
8-bit card, Model 5210-003¶
- from Vojtech Pavlik <vojtech@suse.cz> using portions of the existingarcnet-hardware file.
This is a 90C26 based card. Its configuration seems similar to the SMCPC100, but has some additional jumpers I don’t know the meaning of.
__ | | ___________|__|_________________________ | | | | | | BNC | | | |______| ___| | _____________________ |___ | | | | | | Hybrid IC | | | | | o|o J1 | | |_____________________| 8|8 | | 8|8 J5 | | o|o | | 8|8 | |__ 8|8 |(|__| LED o|o | | 8|8 | | 8|8 J15 | | | | _____ | | | | _____ | | | | | | ___| | | | | | | | _____ | ROM | | UFS | | | | | | | | | | | | | ___ | | | | | | | | | | |__.__| |__.__| | | | NCR | |XTL| _____ _____ | | | | |___| | | | | | | |90C26| | | | | | | | | | RAM | | UFS | | | | | J17 o|o | | | | | | | | J16 o|o | | | | | | |__.__| |__.__| |__.__| | | ___ | | | |8 | | |SW2| | | | | | | |___|1 | | ___ | | | |10 J18 o|o | | | | o|o | | |SW1| o|o | | | | J21 o|o | | |___|1 | | | |____________________________________|
Legend:
90C26 ARCNET ChipXTL 20 MHz CrystalSW1 1-6 Base I/O Address Select 7-10 Memory Address SelectSW2 1-8 Node ID Select (ID0-ID7)J1-J5 IRQ SelectJ6-J21 Unknown (Probably extra timeouts & ROM enable ...)LED1 Activity LEDBNC Coax connector (STAR ARCnet)RAM 2k of SRAMROM Boot ROM socketUFS Unidentified Flying Sockets
Setting the Node ID¶
The eight switches in SW2 are used to set the node ID. Each node attachedto the network must have an unique node ID which must not be 0.Switch 1 (ID0) serves as the least significant bit (LSB).
Setting one of the switches to OFF means “1”, ON means “0”.
The node ID is the sum of the values of all switches set to “1”These values are:
Switch | Value-------|------- 1 | 1 2 | 2 3 | 4 4 | 8 5 | 16 6 | 32 7 | 64 8 | 128
Don’t set this to 0 or 255; these values are reserved.
Setting the I/O Base Address¶
The switches 1 to 6 of switch block SW1 are used to select oneof 32 possible I/O Base addresses using the following tables:
| HexSwitch | Value-------|------- 1 | 200 2 | 100 3 | 80 4 | 40 5 | 20 6 | 10
The I/O address is sum of all switches set to “1”. Remember thatthe I/O address space bellow 0x200 is RESERVED for mainboard, soswitch 1 should be ALWAYS SET TO OFF.
Setting the Base Memory (RAM) buffer Address¶
The memory buffer (RAM) requires 2K. The base of this buffer can belocated in any of sixteen positions. However, the addresses belowA0000 are likely to cause system hang because there’s main RAM.
Jumpers 7-10 of switch block SW1 select the Memory Base address:
Switch | Hex RAM 7 8 9 10 | Address----------------|---------OFF OFF OFF OFF | F0000 (conflicts with main BIOS)OFF OFF OFF ON | E0000OFF OFF ON OFF | D0000OFF OFF ON ON | C0000 (conflicts with video BIOS)OFF ON OFF OFF | B0000 (conflicts with mono video)OFF ON OFF ON | A0000 (conflicts with graphics)
Setting the Interrupt Line¶
Jumpers 1-5 of the jumper block J1 control the IRQ level. ON meansshorted, OFF means open:
Jumper | IRQ 1 2 3 4 5 |---------------------------- ON OFF OFF OFF OFF | 7 OFF ON OFF OFF OFF | 5 OFF OFF ON OFF OFF | 4 OFF OFF OFF ON OFF | 3 OFF OFF OFF OFF ON | 2
Unknown jumpers & sockets¶
I know nothing about these. I just guess that J16&J17 are timeoutjumpers and maybe one of J18-J21 selects ROM. Also J6-J10 andJ11-J15 are connecting IRQ2-7 to some pins on the UFSs. I can’tguess the purpose.
Datapoint?¶
LAN-ARC-8, an 8-bit card¶
- from Vojtech Pavlik <vojtech@suse.cz>
This is another SMC 90C65-based ARCnet card. I couldn’t identify themanufacturer, but it might be DataPoint, because the card has theoriginal arcNet logo in its upper right corner.
_______________________________________________________| _________ || | SW2 | ON arcNet || |_________| OFF ___|| _____________ 1 ______ 8 | | 8| | | SW1 | XTAL | ____________ | S || > RAM (2k) | |______|| | | W || |_____________| | H | | 3 || _________|_____ y | |___| 1| _________ | | |b | || |_________| | | |r | || | SMC | |i | || | 90C65| |d | || _________ | | | | || | SW1 | ON | | |I | || |_________| OFF |_________|_____/C | _____|| 1 8 | | | |___| ______________ | | | BNC |___|| | | |____________| |_____|| > EPROM SOCKET | _____________ || |______________| |_____________| || ______________|| ||________________________________________|
Legend:
90C65 ARCNET ChipSW1 1-5: Base Memory Address Select 6-8: Base I/O Address SelectSW2 1-8: Node ID SelectSW3 1-5: IRQ Select 6-7: Extra Timeout 8 : ROM EnableBNC Coax connectorXTAL 20 MHz Crystal
Setting the Node ID¶
The eight switches in SW3 are used to set the node ID. Each node attachedto the network must have an unique node ID which must not be 0.Switch 1 serves as the least significant bit (LSB).
Setting one of the switches to Off means “1”, On means “0”.
The node ID is the sum of the values of all switches set to “1”These values are:
Switch | Value-------|------- 1 | 1 2 | 2 3 | 4 4 | 8 5 | 16 6 | 32 7 | 64 8 | 128
Setting the I/O Base Address¶
The last three switches in switch block SW1 are used to select oneof eight possible I/O Base addresses using the following table:
Switch | Hex I/O 6 7 8 | Address------------|--------ON ON ON | 260OFF ON ON | 290ON OFF ON | 2E0 (Manufacturer's default)OFF OFF ON | 2F0ON ON OFF | 300OFF ON OFF | 350ON OFF OFF | 380OFF OFF OFF | 3E0
Setting the Base Memory (RAM) buffer Address¶
The memory buffer (RAM) requires 2K. The base of this buffer can belocated in any of eight positions. The address of the Boot Prom ismemory base + 0x2000.
Jumpers 3-5 of switch block SW1 select the Memory Base address.
Switch | Hex RAM | Hex ROM 1 2 3 4 5 | Address | Address *) --------------------|---------|----------- ON ON ON ON ON | C0000 | C2000 ON ON OFF ON ON | C4000 | C6000 ON ON ON OFF ON | CC000 | CE000 ON ON OFF OFF ON | D0000 | D2000 (Manufacturer's default) ON ON ON ON OFF | D4000 | D6000 ON ON OFF ON OFF | D8000 | DA000 ON ON ON OFF OFF | DC000 | DE000 ON ON OFF OFF OFF | E0000 | E2000*) To enable the Boot ROM set the switch 8 of switch block SW3 to position ON.
The switches 1 and 2 probably add 0x0800 and 0x1000 to RAM base address.
Setting the Interrupt Line¶
Switches 1-5 of the switch block SW3 control the IRQ level:
Jumper | IRQ 1 2 3 4 5 |---------------------------- ON OFF OFF OFF OFF | 3 OFF ON OFF OFF OFF | 4 OFF OFF ON OFF OFF | 5 OFF OFF OFF ON OFF | 7 OFF OFF OFF OFF ON | 2
Setting the Timeout Parameters¶
The switches 6-7 of the switch block SW3 are used to determine the timeoutparameters. These two switches are normally left in the OFF position.
Topware¶
8-bit card, TA-ARC/10¶
- from Vojtech Pavlik <vojtech@suse.cz>
This is another very similar 90C65 card. Most of the switches and jumpersare the same as on other clones.
_____________________________________________________________________| ___________ | | ______ || |SW2 NODE ID| | | | XTAL | || |___________| | Hybrid IC | |______| || ___________ | | __|| |SW1 MEM+I/O| |_________________________| LED1|__|)| |___________| 1 2 || J3 |o|o| TIMEOUT ______|| ______________ |o|o| | || | | ___________________ | RJ || > EPROM SOCKET | | \ |------||J2 |______________| | | | |||o| | | |______|||o| ROM ENABLE | SMC | _________ || _____________ | 90C65 | |_________| _____|| | | | | | |___| > RAM (2k) | | | | BNC |___|| |_____________| | | |_____|| |____________________| || ________ IRQ 2 3 4 5 7 ___________ |||________| |o|o|o|o|o| |___________| ||________ J1|o|o|o|o|o| ______________| | | |_____________________________________________|
Legend:
90C65 ARCNET ChipXTAL 20 MHz CrystalSW1 1-5 Base Memory Address Select 6-8 Base I/O Address SelectSW2 1-8 Node ID Select (ID0-ID7)J1 IRQ SelectJ2 ROM EnableJ3 Extra TimeoutLED1 Activity LEDBNC Coax connector (BUS ARCnet)RJ Twisted Pair Connector (daisy chain)
Setting the Node ID¶
The eight switches in SW2 are used to set the node ID. Each node attached tothe network must have an unique node ID which must not be 0. Switch 1 (ID0)serves as the least significant bit (LSB).
Setting one of the switches to Off means “1”, On means “0”.
The node ID is the sum of the values of all switches set to “1”These values are:
Switch | Label | Value-------|-------|------- 1 | ID0 | 1 2 | ID1 | 2 3 | ID2 | 4 4 | ID3 | 8 5 | ID4 | 16 6 | ID5 | 32 7 | ID6 | 64 8 | ID7 | 128
Setting the I/O Base Address¶
The last three switches in switch block SW1 are used to select oneof eight possible I/O Base addresses using the following table:
Switch | Hex I/O 6 7 8 | Address------------|--------ON ON ON | 260 (Manufacturer's default)OFF ON ON | 290ON OFF ON | 2E0OFF OFF ON | 2F0ON ON OFF | 300OFF ON OFF | 350ON OFF OFF | 380OFF OFF OFF | 3E0
Setting the Base Memory (RAM) buffer Address¶
The memory buffer (RAM) requires 2K. The base of this buffer can belocated in any of eight positions. The address of the Boot Prom ismemory base + 0x2000.
Jumpers 3-5 of switch block SW1 select the Memory Base address.
Switch | Hex RAM | Hex ROM 1 2 3 4 5 | Address | Address *)--------------------|---------|-----------ON ON ON ON ON | C0000 | C2000ON ON OFF ON ON | C4000 | C6000 (Manufacturer's default)ON ON ON OFF ON | CC000 | CE000ON ON OFF OFF ON | D0000 | D2000ON ON ON ON OFF | D4000 | D6000ON ON OFF ON OFF | D8000 | DA000ON ON ON OFF OFF | DC000 | DE000ON ON OFF OFF OFF | E0000 | E2000*) To enable the Boot ROM short the jumper J2.
The jumpers 1 and 2 probably add 0x0800 and 0x1000 to RAM address.
Setting the Interrupt Line¶
Jumpers 1-5 of the jumper block J1 control the IRQ level. ON meansshorted, OFF means open:
Jumper | IRQ 1 2 3 4 5 |---------------------------- ON OFF OFF OFF OFF | 2 OFF ON OFF OFF OFF | 3 OFF OFF ON OFF OFF | 4 OFF OFF OFF ON OFF | 5 OFF OFF OFF OFF ON | 7
Setting the Timeout Parameters¶
The jumpers J3 are used to set the timeout parameters. These twojumpers are normally left open.
Thomas-Conrad¶
Model #500-6242-0097 REV A (8-bit card)¶
- from Lars Karlsson <100617.3473@compuserve.com>
________________________________________________________| ________ ________ |_____| |........| |........| || |________| |________| ___|| SW 3 SW 1 | || Base I/O Base Addr. Station | || address | || ______ switch | || | | | || | | |___|| | | ______ |___._| |______| |______| ____| BNC| Jumper- _____| Connector| Main chip block _ __| '| | | | RJ Connector| |_| | with 110 Ohm| |__ Terminator| ___________ __|| |...........| | RJ-jack| |...........| _____ | (unused)| |___________| |_____| |__| Boot PROM socket IRQ-jumpers |_ Diagnostic|________ __ _| LED (red) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |________| | |
And here are the settings for some of the switches and jumpers on the cards.
I/O 1 2 3 4 5 6 7 82E0----- 0 0 0 1 0 0 0 12F0----- 0 0 0 1 0 0 0 0300----- 0 0 0 0 1 1 1 1350----- 0 0 0 0 1 1 1 0
“0” in the above example means switch is off “1” means that it is on.
ShMem address. 1 2 3 4 5 6 7 8CX00--0 0 1 1 | | |DX00--0 0 1 0 |X000--------- 1 1 |X400--------- 1 0 |X800--------- 0 1 |XC00--------- 0 0ENHANCED----------- 1COMPATIBLE--------- 0
IRQ3 4 5 7 2. . . . .. . . . .
There is a DIP-switch with 8 switches, used to set the shared memory addressto be used. The first 6 switches set the address, the 7th doesn’t have anyfunction, and the 8th switch is used to select “compatible” or “enhanced”.When I got my two cards, one of them had this switch set to “enhanced”. Thatcard didn’t work at all, it wasn’t even recognized by the driver. The othercard had this switch set to “compatible” and it behaved absolutely normally. Iguess that the switch on one of the cards, must have been changed accidentallywhen the card was taken out of its former host. The question remainsunanswered, what is the purpose of the “enhanced” position?
[Avery’s note: “enhanced” probably either disables shared memory (use IOports instead) or disables IO ports (use memory addresses instead). Thisvaries by the type of card involved. I fail to see how either of theseenhance anything. Send me more detailed information about this mode, orjust use “compatible” mode instead.]
Waterloo Microsystems Inc. ??¶
8-bit card (C) 1985¶
- from Robert Michael Best <rmb117@cs.usask.ca>
[Avery’s note: these don’t work with my driver for some reason. These cardsSEEM to have settings similar to the PDI508Plus, which issoftware-configured and doesn’t work with my driver either. The “Waterloochip” is a boot PROM, probably designed specifically for the University ofWaterloo. If you have any further information about this card, pleasee-mail me.]
The probe has not been able to detect the card on any of the J2 settings,and I tried them again with the “Waterloo” chip removed.
_____________________________________________________________________| \/ \/ ___ __ __ || C4 C4 |^| | M || ^ ||^| || -- -- |_| | 5 || || | C3 || \/ \/ C10 |___|| ||_| || C4 C4 _ _ | | ?? || -- -- | \/ || | || | || | || | || C1 | || | || | \/ _____|| | C6 || | C9 | |___| | || | -- | BNC |___|| | || | >C7| |_____|| | || | || __ __ |____||_____| 1 2 3 6 ||| ^ | >C4| |o|o|o|o|o|o| J2 >C4| ||| | |o|o|o|o|o|o| ||| C2 | >C4| >C4| ||| | >C8| ||| | 2 3 4 5 6 7 IRQ >C4| |||_____| |o|o|o|o|o|o| J3 ||_______ |o|o|o|o|o|o| _______________| | | |_____________________________________________|C1 -- "COM9026 SMC 8638" In a chip socket.C2 -- "@Copyright Waterloo Microsystems Inc. 1985" In a chip Socket with info printed on a label covering a round window showing the circuit inside. (The window indicates it is an EPROM chip.)C3 -- "COM9032 SMC 8643" In a chip socket.C4 -- "74LS" 9 total no sockets.M5 -- "50006-136 20.000000 MHZ MTQ-T1-S3 0 M-TRON 86-40" Metallic case with 4 pins, no socket.C6 -- "MOSTEK@TC8643 MK6116N-20 MALAYSIA" No socket.C7 -- No stamp or label but in a 20 pin chip socket.C8 -- "PAL10L8CN 8623" In a 20 pin socket.C9 -- "PAl16R4A-2CN 8641" In a 20 pin socket.C10 -- "M8640 NMC 9306N" In an 8 pin socket.?? -- Some components on a smaller board and attached with 20 pins all along the side closest to the BNC connector. The are coated in a dark resin.
On the board there are two jumper banks labeled J2 and J3. Themanufacturer didn’t put a J1 on the board. The two boards I have bothcame with a jumper box for each bank.
J2 -- Numbered 1 2 3 4 5 6. 4 and 5 are not stamped due to solder points.J3 -- IRQ 2 3 4 5 6 7
The board itself has a maple leaf stamped just above the irq jumpersand “-2 46-86” beside C2. Between C1 and C6 “ASS ‘Y 300163” and “@1986CORMAN CUSTOM ELECTRONICS CORP.” stamped just below the BNC connector.Below that “MADE IN CANADA”
No Name¶
8-bit cards, 16-bit cards¶
- from Juergen Seifert <seifert@htwm.de>
I have named this ARCnet card “NONAME”, since there is no name of anymanufacturer on the Installation manual nor on the shipping box. The onlyhint to the existence of a manufacturer at all is written in copper,it is “Made in Taiwan”
This description has been written by Juergen Seifert <seifert@htwm.de>using information from the Original
“ARCnet Installation Manual”
________________________________________________________________| |STAR| BUS| T/P| || |____|____|____| || _____________________ || | | || | | || | | || | SMC | || | | || | COM90C65 | || | | || | | || |__________-__________| || _____|| _______________ | CN || | PROM | |_____|| > SOCKET | || |_______________| 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 || _______________ _______________ || |o|o|o|o|o|o|o|o| | SW1 || SW2 ||| |o|o|o|o|o|o|o|o| |_______________||_______________|||___ 2 3 4 5 7 E E R Node ID IOB__|__MEM____| | \ IRQ / T T O | |__________________1_2_M______________________|
Legend:
COM90C65: ARCnet ProbeS1 1-8: Node ID SelectS2 1-3: I/O Base Address Select 4-6: Memory Base Address Select 7-8: RAM Offset SelectET1, ET2 Extended Timeout SelectROM ROM Enable SelectCN RG62 Coax ConnectorSTAR| BUS | T/P Three fields for placing a sign (colored circle) indicating the topology of the card
Setting one of the switches to Off means “1”, On means “0”.
Setting the Node ID¶
The eight switches in group SW1 are used to set the node ID.Each node attached to the network must have an unique node ID whichmust be different from 0.Switch 8 serves as the least significant bit (LSB).
The node ID is the sum of the values of all switches set to “1”These values are:
Switch | Value-------|------- 8 | 1 7 | 2 6 | 4 5 | 8 4 | 16 3 | 32 2 | 64 1 | 128
Some Examples:
Switch | Hex | Decimal1 2 3 4 5 6 7 8 | Node ID | Node ID----------------|---------|---------0 0 0 0 0 0 0 0 | not allowed0 0 0 0 0 0 0 1 | 1 | 10 0 0 0 0 0 1 0 | 2 | 20 0 0 0 0 0 1 1 | 3 | 3 . . . | |0 1 0 1 0 1 0 1 | 55 | 85 . . . | |1 0 1 0 1 0 1 0 | AA | 170 . . . | |1 1 1 1 1 1 0 1 | FD | 2531 1 1 1 1 1 1 0 | FE | 2541 1 1 1 1 1 1 1 | FF | 255
Setting the I/O Base Address¶
The first three switches in switch group SW2 are used to select oneof eight possible I/O Base addresses using the following table:
Switch | Hex I/O 1 2 3 | Address------------|--------ON ON ON | 260ON ON OFF | 290ON OFF ON | 2E0 (Manufacturer's default)ON OFF OFF | 2F0OFF ON ON | 300OFF ON OFF | 350OFF OFF ON | 380OFF OFF OFF | 3E0
Setting the Base Memory (RAM) buffer Address¶
The memory buffer requires 2K of a 16K block of RAM. The base of this16K block can be located in any of eight positions.Switches 4-6 of switch group SW2 select the Base of the 16K block.Within that 16K address space, the buffer may be assigned any one of fourpositions, determined by the offset, switches 7 and 8 of group SW2.
Switch | Hex RAM | Hex ROM4 5 6 7 8 | Address | Address *)-----------|---------|-----------0 0 0 0 0 | C0000 | C20000 0 0 0 1 | C0800 | C20000 0 0 1 0 | C1000 | C20000 0 0 1 1 | C1800 | C2000 | |0 0 1 0 0 | C4000 | C60000 0 1 0 1 | C4800 | C60000 0 1 1 0 | C5000 | C60000 0 1 1 1 | C5800 | C6000 | |0 1 0 0 0 | CC000 | CE0000 1 0 0 1 | CC800 | CE0000 1 0 1 0 | CD000 | CE0000 1 0 1 1 | CD800 | CE000 | |0 1 1 0 0 | D0000 | D2000 (Manufacturer's default)0 1 1 0 1 | D0800 | D20000 1 1 1 0 | D1000 | D20000 1 1 1 1 | D1800 | D2000 | |1 0 0 0 0 | D4000 | D60001 0 0 0 1 | D4800 | D60001 0 0 1 0 | D5000 | D60001 0 0 1 1 | D5800 | D6000 | |1 0 1 0 0 | D8000 | DA0001 0 1 0 1 | D8800 | DA0001 0 1 1 0 | D9000 | DA0001 0 1 1 1 | D9800 | DA000 | |1 1 0 0 0 | DC000 | DE0001 1 0 0 1 | DC800 | DE0001 1 0 1 0 | DD000 | DE0001 1 0 1 1 | DD800 | DE000 | |1 1 1 0 0 | E0000 | E20001 1 1 0 1 | E0800 | E20001 1 1 1 0 | E1000 | E20001 1 1 1 1 | E1800 | E2000*) To enable the 8K Boot PROM install the jumper ROM. The default is jumper ROM not installed.
Setting Interrupt Request Lines (IRQ)¶
To select a hardware interrupt level set one (only one!) of the jumpersIRQ2, IRQ3, IRQ4, IRQ5 or IRQ7. The manufacturer’s default is IRQ2.
Setting the Timeouts¶
The two jumpers labeled ET1 and ET2 are used to determine the timeoutparameters (response and reconfiguration time). Every node in a networkmust be set to the same timeout values.
ET1 ET2 | Response Time (us) | Reconfiguration Time (ms)--------|--------------------|--------------------------Off Off | 78 | 840 (Default)Off On | 285 | 1680On Off | 563 | 1680On On | 1130 | 1680
On means jumper installed, Off means jumper not installed
16-BIT ARCNET¶
The manual of my 8-Bit NONAME ARCnet Card contains another descriptionof a 16-Bit Coax / Twisted Pair Card. This description is incomplete,because there are missing two pages in the manual booklet. (The tableof contents reports pages … 2-9, 2-11, 2-12, 3-1, … but insidethe booklet there is a different way of counting … 2-9, 2-10, A-1,(empty page), 3-1, …, 3-18, A-1 (again), A-2)Also the picture of the board layout is not as good as the picture of8-Bit card, because there isn’t any letter like “SW1” written to thepicture.
Should somebody have such a board, please feel free to complete thisdescription or to send a mail to me!
This description has been written by Juergen Seifert <seifert@htwm.de>using information from the Original
“ARCnet Installation Manual”
___________________________________________________________________< _________________ _________________ |> | SW? || SW? | |< |_________________||_________________| |> ____________________ |< | | |> | | |< | | |> | | |< | | |> | | |< | | |> |____________________| |< ____|> ____________________ | |< | | | J1 |> | < | |< |____________________| ? ? ? ? ? ? |____|> |o|o|o|o|o|o| |< |o|o|o|o|o|o| |> |< __ ___________|> | | |<____________| |_______________________________________|
Setting one of the switches to Off means “1”, On means “0”.
Setting the Node ID¶
The eight switches in group SW2 are used to set the node ID.Each node attached to the network must have an unique node ID whichmust be different from 0.Switch 8 serves as the least significant bit (LSB).
The node ID is the sum of the values of all switches set to “1”These values are:
Switch | Value-------|------- 8 | 1 7 | 2 6 | 4 5 | 8 4 | 16 3 | 32 2 | 64 1 | 128
Some Examples:
Switch | Hex | Decimal1 2 3 4 5 6 7 8 | Node ID | Node ID----------------|---------|---------0 0 0 0 0 0 0 0 | not allowed0 0 0 0 0 0 0 1 | 1 | 10 0 0 0 0 0 1 0 | 2 | 20 0 0 0 0 0 1 1 | 3 | 3 . . . | |0 1 0 1 0 1 0 1 | 55 | 85 . . . | |1 0 1 0 1 0 1 0 | AA | 170 . . . | |1 1 1 1 1 1 0 1 | FD | 2531 1 1 1 1 1 1 0 | FE | 2541 1 1 1 1 1 1 1 | FF | 255
Setting the I/O Base Address¶
The first three switches in switch group SW1 are used to select oneof eight possible I/O Base addresses using the following table:
Switch | Hex I/O 3 2 1 | Address------------|--------ON ON ON | 260ON ON OFF | 290ON OFF ON | 2E0 (Manufacturer's default)ON OFF OFF | 2F0OFF ON ON | 300OFF ON OFF | 350OFF OFF ON | 380OFF OFF OFF | 3E0
Setting the Base Memory (RAM) buffer Address¶
The memory buffer requires 2K of a 16K block of RAM. The base of this16K block can be located in any of eight positions.Switches 6-8 of switch group SW1 select the Base of the 16K block.Within that 16K address space, the buffer may be assigned any one of fourpositions, determined by the offset, switches 4 and 5 of group SW1:
Switch | Hex RAM | Hex ROM8 7 6 5 4 | Address | Address-----------|---------|-----------0 0 0 0 0 | C0000 | C20000 0 0 0 1 | C0800 | C20000 0 0 1 0 | C1000 | C20000 0 0 1 1 | C1800 | C2000 | |0 0 1 0 0 | C4000 | C60000 0 1 0 1 | C4800 | C60000 0 1 1 0 | C5000 | C60000 0 1 1 1 | C5800 | C6000 | |0 1 0 0 0 | CC000 | CE0000 1 0 0 1 | CC800 | CE0000 1 0 1 0 | CD000 | CE0000 1 0 1 1 | CD800 | CE000 | |0 1 1 0 0 | D0000 | D2000 (Manufacturer's default)0 1 1 0 1 | D0800 | D20000 1 1 1 0 | D1000 | D20000 1 1 1 1 | D1800 | D2000 | |1 0 0 0 0 | D4000 | D60001 0 0 0 1 | D4800 | D60001 0 0 1 0 | D5000 | D60001 0 0 1 1 | D5800 | D6000 | |1 0 1 0 0 | D8000 | DA0001 0 1 0 1 | D8800 | DA0001 0 1 1 0 | D9000 | DA0001 0 1 1 1 | D9800 | DA000 | |1 1 0 0 0 | DC000 | DE0001 1 0 0 1 | DC800 | DE0001 1 0 1 0 | DD000 | DE0001 1 0 1 1 | DD800 | DE000 | |1 1 1 0 0 | E0000 | E20001 1 1 0 1 | E0800 | E20001 1 1 1 0 | E1000 | E20001 1 1 1 1 | E1800 | E2000
Setting Interrupt Request Lines (IRQ)¶
Setting the Timeouts¶
8-bit cards (“Made in Taiwan R.O.C.”)¶
- from Vojtech Pavlik <vojtech@suse.cz>
I have named this ARCnet card “NONAME”, since I got only the card withno manual at all and the only text identifying the manufacturer is“MADE IN TAIWAN R.O.C” printed on the card.
____________________________________________________________| 1 2 3 4 5 6 7 8 || |o|o| JP1 o|o|o|o|o|o|o|o| ON || + o|o|o|o|o|o|o|o| ___|| _____________ o|o|o|o|o|o|o|o| OFF _____ | | ID7| | | SW1 | | | | ID6| > RAM (2k) | ____________________ | H | | S | ID5| |_____________| | || y | | W | ID4| | || b | | 2 | ID3| | || r | | | ID2| | || i | | | ID1| | 90C65 || d | |___| ID0| SW3 | || | || |o|o|o|o|o|o|o|o| ON | || I | || |o|o|o|o|o|o|o|o| | || C | || |o|o|o|o|o|o|o|o| OFF |____________________|| | _____|| 1 2 3 4 5 6 7 8 | | | |___| ______________ | | | BNC |___|| | | |_____| |_____|| > EPROM SOCKET | || |______________| || ______________|| ||_____________________________________________|
Legend:
90C65 ARCNET ChipSW1 1-5: Base Memory Address Select 6-8: Base I/O Address SelectSW2 1-8: Node ID Select (ID0-ID7)SW3 1-5: IRQ Select 6-7: Extra Timeout 8 : ROM EnableJP1 Led connectorBNC Coax connector
Although the jumpers SW1 and SW3 are marked SW, not JP, they are jumpers, notswitches.
Setting the jumpers to ON means connecting the upper two pins, off the bottomtwo - or - in case of IRQ setting, connecting none of them at all.
Setting the Node ID¶
The eight switches in SW2 are used to set the node ID. Each node attachedto the network must have an unique node ID which must not be 0.Switch 1 (ID0) serves as the least significant bit (LSB).
Setting one of the switches to Off means “1”, On means “0”.
The node ID is the sum of the values of all switches set to “1”These values are:
Switch | Label | Value-------|-------|------- 1 | ID0 | 1 2 | ID1 | 2 3 | ID2 | 4 4 | ID3 | 8 5 | ID4 | 16 6 | ID5 | 32 7 | ID6 | 64 8 | ID7 | 128
Some Examples:
Switch | Hex | Decimal8 7 6 5 4 3 2 1 | Node ID | Node ID----------------|---------|---------0 0 0 0 0 0 0 0 | not allowed0 0 0 0 0 0 0 1 | 1 | 10 0 0 0 0 0 1 0 | 2 | 20 0 0 0 0 0 1 1 | 3 | 3 . . . | |0 1 0 1 0 1 0 1 | 55 | 85 . . . | |1 0 1 0 1 0 1 0 | AA | 170 . . . | |1 1 1 1 1 1 0 1 | FD | 2531 1 1 1 1 1 1 0 | FE | 2541 1 1 1 1 1 1 1 | FF | 255
Setting the I/O Base Address¶
The last three switches in switch block SW1 are used to select oneof eight possible I/O Base addresses using the following table:
Switch | Hex I/O 6 7 8 | Address------------|--------ON ON ON | 260OFF ON ON | 290ON OFF ON | 2E0 (Manufacturer's default)OFF OFF ON | 2F0ON ON OFF | 300OFF ON OFF | 350ON OFF OFF | 380OFF OFF OFF | 3E0
Setting the Base Memory (RAM) buffer Address¶
The memory buffer (RAM) requires 2K. The base of this buffer can belocated in any of eight positions. The address of the Boot Prom ismemory base + 0x2000.
Jumpers 3-5 of jumper block SW1 select the Memory Base address.
Switch | Hex RAM | Hex ROM 1 2 3 4 5 | Address | Address *) --------------------|---------|----------- ON ON ON ON ON | C0000 | C2000 ON ON OFF ON ON | C4000 | C6000 ON ON ON OFF ON | CC000 | CE000 ON ON OFF OFF ON | D0000 | D2000 (Manufacturer's default) ON ON ON ON OFF | D4000 | D6000 ON ON OFF ON OFF | D8000 | DA000 ON ON ON OFF OFF | DC000 | DE000 ON ON OFF OFF OFF | E0000 | E2000*) To enable the Boot ROM set the jumper 8 of jumper block SW3 to position ON.
The jumpers 1 and 2 probably add 0x0800, 0x1000 and 0x1800 to RAM adders.
Setting the Interrupt Line¶
Jumpers 1-5 of the jumper block SW3 control the IRQ level:
Jumper | IRQ 1 2 3 4 5 |---------------------------- ON OFF OFF OFF OFF | 2 OFF ON OFF OFF OFF | 3 OFF OFF ON OFF OFF | 4 OFF OFF OFF ON OFF | 5 OFF OFF OFF OFF ON | 7
Setting the Timeout Parameters¶
The jumpers 6-7 of the jumper block SW3 are used to determine the timeoutparameters. These two jumpers are normally left in the OFF position.
(Generic Model 9058)¶
- from Andrew J. Kroll <ag784@freenet.buffalo.edu>
- Sorry this sat in my to-do box for so long, Andrew! (yikes - over ayear!)
_____ | < | .---' ________________________________________________________________ | || | SW2 | | || ___________ |_____________| | || | | 1 2 3 4 5 6 ___| || > 6116 RAM | _________ 8 | | || |___________| |20MHzXtal| 7 | | || |_________| __________ 6 | S | || 74LS373 | |- 5 | W | || _________ | E |- 4 | | || >_______| ______________|..... P |- 3 | 3 | || | | : O |- 2 | | || | | : X |- 1 |___| || ________________ | | : Y |- | || | SW1 | | SL90C65 | : |- | || |________________| | | : B |- | || 1 2 3 4 5 6 7 8 | | : O |- | || |_________o____|..../ A |- _______| || ____________________ | R |- | |------,| | | | D |- | BNC | # || > 2764 PROM SOCKET | |__________|- |_______|------'| |____________________| _________ | || >________| <- 74LS245 | || | ||___ ______________| | |H H H H H H H H H H H H H H H H H H H H H H H| | | |U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U_U| | | \|
Legend:
SL90C65 ARCNET Controller / Transceiver /LogicSW1 1-5: IRQ Select 6: ET1 7: ET2 8: ROM ENABLESW2 1-3: Memory Buffer/PROM Address 3-6: I/O Address MapSW3 1-8: Node ID SelectBNC BNC RG62/U Connection *I* have had success using RG59B/U with *NO* terminators! What gives?!
SW1: Timeouts, Interrupt and ROM¶
To select a hardware interrupt level set one (only one!) of the dip switchesup (on) SW1…(switches 1-5)IRQ3, IRQ4, IRQ5, IRQ7, IRQ2. The Manufacturer’s default is IRQ2.
The switches on SW1 labeled EXT1 (switch 6) and EXT2 (switch 7)are used to determine the timeout parameters. These two dip switchesare normally left off (down).
To enable the 8K Boot PROM position SW1 switch 8 on (UP) labeled ROM.The default is jumper ROM not installed.
Setting the I/O Base Address¶
The last three switches in switch group SW2 are used to select oneof eight possible I/O Base addresses using the following table:
Switch | Hex I/O4 5 6 | Address-------|--------0 0 0 | 2600 0 1 | 2900 1 0 | 2E0 (Manufacturer's default)0 1 1 | 2F01 0 0 | 3001 0 1 | 3501 1 0 | 3801 1 1 | 3E0
Setting the Base Memory Address (RAM & ROM)¶
The memory buffer requires 2K of a 16K block of RAM. The base of this16K block can be located in any of eight positions.Switches 1-3 of switch group SW2 select the Base of the 16K block.(0 = DOWN, 1 = UP)I could, however, only verify two settings…
Switch| Hex RAM | Hex ROM1 2 3 | Address | Address------|---------|-----------0 0 0 | E0000 | E20000 0 1 | D0000 | D2000 (Manufacturer's default)0 1 0 | ????? | ?????0 1 1 | ????? | ?????1 0 0 | ????? | ?????1 0 1 | ????? | ?????1 1 0 | ????? | ?????1 1 1 | ????? | ?????
Setting the Node ID¶
The eight switches in group SW3 are used to set the node ID.Each node attached to the network must have an unique node ID whichmust be different from 0.Switch 1 serves as the least significant bit (LSB).switches in the DOWN position are OFF (0) and in the UP position are ON (1)
The node ID is the sum of the values of all switches set to “1”These values are:
Switch | Value-------|------- 1 | 1 2 | 2 3 | 4 4 | 8 5 | 16 6 | 32 7 | 64 8 | 128
Some Examples:
Switch# | Hex | Decimal8 7 6 5 4 3 2 1 | Node ID | Node ID----------------|---------|---------0 0 0 0 0 0 0 0 | not allowed <-.0 0 0 0 0 0 0 1 | 1 | 1 |0 0 0 0 0 0 1 0 | 2 | 2 |0 0 0 0 0 0 1 1 | 3 | 3 | . . . | | |0 1 0 1 0 1 0 1 | 55 | 85 | . . . | | + Don't use 0 or 255!1 0 1 0 1 0 1 0 | AA | 170 | . . . | | |1 1 1 1 1 1 0 1 | FD | 253 |1 1 1 1 1 1 1 0 | FE | 254 |1 1 1 1 1 1 1 1 | FF | 255 <-'
Tiara¶
(model unknown)¶
- from Christoph Lameter <christoph@lameter.com>
Here is information about my card as far as I could figure it out:
----------------------------------------------- tiaraTiara LanCard of Tiara Computer Systems.+----------------------------------------------+! ! Transmitter Unit ! !! +------------------+ -------! MEM Coax Connector! ROM 7654321 <- I/O -------! : : +--------+ !! : : ! 90C66LJ! +++! : : ! ! !D Switch to set! : : ! ! !I the Nodenumber! : : +--------+ !P! !++! 234567 <- IRQ !+------------!!!!!!!!!!!!!!!!!!!!!!!!--------+ !!!!!!!!!!!!!!!!!!!!!!!!
- 0 = Jumper Installed
- 1 = Open
Top Jumper line Bit 7 = ROM Enable 654=Memory location 321=I/O
Settings for Memory Location (Top Jumper Line)
| 456 | Address selected |
|---|---|
| 000 | C0000 |
| 001 | C4000 |
| 010 | CC000 |
| 011 | D0000 |
| 100 | D4000 |
| 101 | D8000 |
| 110 | DC000 |
| 111 | E0000 |
Settings for I/O Address (Top Jumper Line)
| 123 | Port |
|---|---|
| 000 | 260 |
| 001 | 290 |
| 010 | 2E0 |
| 011 | 2F0 |
| 100 | 300 |
| 101 | 350 |
| 110 | 380 |
| 111 | 3E0 |
Settings for IRQ Selection (Lower Jumper Line)
| 234567 | |
|---|---|
| 011111 | IRQ 2 |
| 101111 | IRQ 3 |
| 110111 | IRQ 4 |
| 111011 | IRQ 5 |
| 111110 | IRQ 7 |
Other Cards¶
I have no information on other models of ARCnet cards at the moment. Pleasesend any and all info to:
Thanks.