9556 / 9557 Planar

rf955657.exe 9556/9557 Reference Disk v1.10 (zipped image)
rd955657.exe 9556/9557 Diagnostic Disk v2.04 (or v1.10?) (zipped image)

192-222 PS/2 56, 57 486SLC2 (0B6, 0BA); Ultimedia M57 (1BA), DV M57 486SLC2 (2BA)
194-032 PS/2 56, 57 (DEx) 56, 57LS (xEX), M57 PCDOS (SEx) Win (7Ex) 486SLC3 Units

XGA208 Windows 95/98 XGA-2 Display Driver by Unal Z
SPOCK206 IBM SCSI Driver for Windows 95/98 and Windows NT by Unal Z

SLC2/3 Planar
System Firmware
  ROM Images
Parallel Port Trivia (DMA Arbitration)
Background speaker noise
Misleading error-Code 0002 11CZ
Prevent System Hangs (ECA - 001)

(-xBx) FRU P/N 39G2676, P/N 39G3304
(-xBx) FRU P/N 39G6410, P/N 8125918(source)
(-xEx) FRU P/N 65G9714, P/N 65G9713(photo thx Carsten Lyng)

Sony CXK58257AM-10L (09G9877),Epson SRM20257LM-12, or compatible32Kx8 SRAM

The 121-pin PGA socket can be usedto install either a CPU upgrade module or 68-pin PLCC socket for 387SX orcompatible math coprocessor.

50G6950 486SLC2 or unknown P/N 486SLC3/BL
486SLC2: PQFP-100 package (386SX-compatible*), 16/24-bit address/data bus
486SLC3: PQFP-132 package (386DX-compatible*), 32/32-bit address/data bus available,here running in the 16/24-bit address/data mode
*Both chips use Vcc = 3.45 V instead of the 5 V supply typical for 386SX/DX.
The PCB is NOT universal. There are two variants - one for the SLC2 and one forthe SLC3 CPU.

256Kx4 Multiport DRAM. EitherOKI MSM514262-80Z orToshiba TC524256BZ-10(XGA-2 video memory).

Am27C2048-150JC BIOS OTP ROM -39G2151 (SLC2) / 65G8608 (SLC3). The ROM is socketed on some (early?) samplesbut soldered in on most.

Some (early?) boards have a rework concerning U24, U33, U36 (pin 38 - NMI?),U63 (+5 V), U69, U75, RN7 (ground?) and two added SMD resistors.

Not populated. The port can be used to access theSerial Console.

(POST & BIOS)

Firmware stored in EPROM.

39G2151 - unknown date/revision, SLC2?, 1x Am27C2048-150JC (U64)
65G8608 - 29 Jul 1993, rev. 4, SLC3 only?, 1x Am27C2048-150JC (U64)

50/25 MHz 486SLC2, 16 KB L1, three SIMM sockets 70 ns parity checked 2, 4 and8 MB SIMMs supported.

> How should I fill the memory? One 8 and two 4MB or 2 8MB SIMMs?
8MB, so you can use interleaved memory access. Use MEM1 and MEM2.
Ed. Aron Eisenpress reported this reallyapplies to the 8556/57 models, he tried the 9556/57, and saw no improvement.

Bordshtles asks:
   Does anyone know of a card to increase the memory on a 9556, I knowits a 386 based machine with a 486 upgrade, Will the 386 memory boards (fromKingston or IBM) work in these machines

Peter fields it:
   Yes. Highly recommended is the Kingston KTM-609 II - since it supportsXMS memory - what the IBM 1-2 and the 0-8 XMA don't.

SCSI drive limits: Max size for SLC2 IML drive is 3.94GB. SLC3 is SurePath,supports drive to 8GB.

Andrew Acton wrote:
   Installing CD-ROM Drive Support under DOS running on a PS/2 MicroChannel Machine with NEC SCSI CD-ROM Drives (MultiSpin 6X, External Drive):

1. Obtain a copy of the following file from NEC tech support.I obtained the following file from my local NEC BBS service in Sydney Australia:

   PS2.ZIP   101,052   22/09/93 | DOS Drivers for PS/2 SCSI machines

2. Unzip the file, run the install program (creates a directoryon the dos boot drive called SCSI), reboot and you now have CD-ROM access!

3. The installation program updates (in my case):

   CONFIG.SYS    -> Device=c:\scsi\neccdr.sys /d:NECCD  -> Lastdrive=E
   AUTOEXEC.BAT  -> C:\scsi\mscdex /d:NECCD /m:10
   

   The PS2.ZIP package is great because it supplies the the device driver(neccdr.sys), the Microsoft CD-ROM extensions (mscdex) and installs the lotwithout and problems.

The SLC2 uses a 82077AA FDC, which supports the 2.88MB floppy. The SLC3uses the 82077SL, which supports the Electronic Eject floppy.

Peter said:
   The PS/2 machines use a slightly different implementation ofthe parallel port that is neither ECP nor EPP but "Arbitrated DMA". Thisis a (antique) method to boost up parallel data throughput up to 1MB/s -with the disadvantage of an non-contiguous data stream(Ed. the IEEE 1284 standard is only 1.2MB/s!).The data is always transported with DMA transfers. Therefore many EPP / ECPport drivers cannot handle that and choke - the IOMEGA is one of these, mostparallel-port CD-drives as well and some HP bidirectional printer driverscannot handle this too.

Workaround: enter machines configuration and set the Parallel port DMA to"Disabled". This causes the parallel port to work in "compatible bidirectional"mode - and the ZIP works fine. A little slower maybe, but works. I run a ZIP onall of my PS/2 with the PP-DMA disabled.

Ian Brown chimes in with:
   Good tip that one Peter. It is also relevant to Ditto drives,certain versions of Lap Link, and just about anything that is connected to theparallel port for bi-directional data transfer.

George Jefferson says:
   Funny thing, i use a parallel zip on my ps2 77 with no problem atall. Matter of fact it is far and away faster than any other machine, includingones that clam to be EPP.

Peter cuts in with:
   Depends on. IBM changed the specification a little -or the BIOSsupport on that respectively- on the 95xx-machines as it seems. The 9556 / 9557still suffer some problems with the DMA enabled, the later 9576 / 9577 (allplanars) seem to be a lot better. The *85*90 / 95 are known for having problemswith various parallel devices (even printers) when leaving the PP-DMA enabled.My 8595-AKD refuses to handle the Iomega ZIP-drive properly until I switchedthe parallel port DMA to "disabled".
   Basically it is a good idea to disable the DMA if one mightexperience problems with parallel CD-drives or scanners on all PS/2 (whichuse DMA printer port) to test whether the device is working at all or ifthere is a cabling problem at all.

Christian A. Roberts says:
   *SHRUG* My Iomega Ditto2Gb didn't get along with my 9556 slc3-75'sparallel port, so I found a Boca Research MCA Parallel adapter...it workedfor awhile, then went belly-up, too.

Peter finishes up with:
A: try the Ditto directly on the parallel-port with the DMA disabled B: thereis a lot trouble reported with BOCA cards (Hi Allen !)  which I cansort only under "strange incidents". I had some Boca cards installed in variousservers and *none* of them caused any trouble - unlike to similar AMS-cards,which scrambled the arrangement of LPT-ports (LPT1 becomes 2, LPT3 becomes1 and LPT2 becomes inactive ... or such). This "sudden death" of Boca PP-cardsis more than myterious. I probably could understand if that happened on veryfast PS/2 (like "Lacuna"-77i, Server 95A, 8595 with Type 3 DX-50 or all Type4 platforms)... but not with a Mod. 80 or a 9556... !

> My Model 57 ps/2 SLC3 75 MHz emits a loud groan when I shut it down!It never use to do this. Is an impending power supply failure?

Peter has another flashback:
   It's not a PSU failure. It's simply a serial manufacturing issuethat occurred during the assembly of the speaker/front panel cable. The "cold"speaker wire is tied to +5V (of the HD-LED AFAIK) instead of being tied to GND.There was (once) an "adapter cable kit" available that was plugged between theboard and the cable plug and fixes this misbehaviour. There was an ECA on IBMabout it:

Symptom:
   Some 8556/57 and 9556/57 systems may exhibit low volume backgroundspeaker noise that alters during screen refresh or mouse movement.

Problem Isolation Aids:
   Problem is specific to 85xx and 95xx 56/57 models. Symptoms willprobably be most noticeable when switching from one application session toanother.

Fix:
   Two cable jumpers have been released to modify the speaker cablewiring. The jumper should be plugged between the speaker cable socket on theplanar and the speaker cable connector.

Details are as follows:
FRU P/N 8130978 (8 pin jumper for i386 8556/8557 systems)
FRU P/N 8130979 (12 pin jumper for i486 9556/9557 systems)

To fix it by yourself:
   You could unsolder the speaker wires and measure the voltages onthe wires against GND (power supply case) with the machine running. Use theone which has *not* +5V for the speaker and another wire directly attached toGND.
   I fixed my 9556 with that trick. If I find the time I try checkingout the wiring on my machine and make a diagram of the proper wiring then...but that will take time.

From Peter Wendt:
   Sometimes problems are reported with the appearance of the Errorcode 0002 11CZ on the PS/2 Models 9556 and 9557. The 2xx-codes basically pointin the direction of defective memory. In fact this failure is mostly caused bya missing / invalid memory module installed in the machine.
   Remind that this machines accept Parity memory only (suffix-P- or -36- on the module sticker), which must match theIBM Presence Detectionscheme and should have 70 ns access-speed. In case there is a memory moduleinstalled, which does not supply presence detection the error 0002 11CZshows up - like as if there were no module installed at all.

The 211-error (0002 11xx is only the extended 8-digit output on the laterPremium Line machines) means basically:

211 Check Memory, with the device path to track:

1. processor board (Model 90 / 95)
2. planar memory
3. memory riser cards (Model 90 only)
4. system board

This product also features IBM SurePath* BIOS that serves as the interfaceand ensures compatibility between hardware and the operating system and applications.(Ed. Is this another IBM goof?)

Model CPU   Memory   Disk  Floppy  Software DBA  SLC2  8-16MB   208   2.88MB  OS/2 or DOS/Win DB6  SLC2  8-16MB   104   2.88MB  OS/2 or DOS/Win DE9  SLC3  8-16MB   170   2.88MB  Choice DEB  SLC3  8-16MB   245   2.88MB  Choice DED  SLC3  8-16MB   340   2.88MB  Choice KBA  SLC2  8-16MB   208   2.88MB  OS/2 2.1 KB6  SLC2  8-16MB   104   2.88MB  OS/2 2.1 QBA  SLC2  8-16MB   208   2.88MB  DOS/Windows QB6  SLC2  8-16MB   104   2.88MB  DOS/Windows 0BA  SLC2  8-16MB   208   2.88MB  OS/2 2.0 0B6  SLC2  8-16MB   104   2.88MB  OS/2 2.0 1EX  SLC3  4-16MB   None    None  N/A (Ethernet) 2EX  SLC3  4-16MB   None    None  N/A (TokenRng)

(ECA - 001)

Machine Type: 9556 and 9557 486SLC3 Systems

Serial Numbers Affected:

M/T     Mod     Serial # Range9556    DE9     23GNGA0 - 23GNXE9        DEB     23LAHVA - 23LDWYF        DED     23FXFVW - 23PXNLC        1EX     23WTCWP - 23WTDRB        2EX     23AAAOA - 23AAG7J9557    DE9     23NVTMO - 23NWKR4        DEB     23NYHBC - 23PARYY        DED     23VKRLM - 23VKXLZ        DEG     23AAAOA - 23ADYOZ

IBM has determined that some 9556 and 9557 486SLC3 Systems manufactured and shipped prior to February 16, 1994 may fail to load large software applications from diskettes.

The failures encountered may be system hangs, OS/2 system errors (SYS0049, SYS3175, SYS0318) and Trap Errors 0004,0006, 0008 or 000D.

If any of the above errors are encountered and the system board has a FRU P/N of 71G3599 or 65G8615, replace the system board with new FRU P/N 65G9714. If the system board FRU P/N is 65G9714 further problem determination should be utilized to isolate the failing FRU. This system board is not affected by this problem and is not to be replaced under this ECA.

Note: IBM recommends that all affected system boards be replaced before a customer experiences a potential problem.

All orders for FRU P/N 71G3599 and 65G8615 will be substituted to FRU P/N 65G9714.