Model:-01AGeneral:Name:Wrist InstrumentCode-Name:CricketFamily:noneLogic:algebraicFeatures:-Firsts:algebraic, 4 function, watch, onlyHP calc w/o exponential notation entryIntroduction:Date:1978-7-1Price:$650 steel case$850 gold tone caseDiscontinuation:Date:1980-01-01Price:$695 steel case? gold tone caseProduction-Run:?Display:Type:LED, 7 segmentSize:8 digitsNumber-Formats:Number: sign, 1-8 digits, "."sign, 1 digit, ".",3 digits, sign, 2 digits(sign is "-" or space)Date:   "DY-MO-YR"(20th cent.)"MO-DY-YR""DY-MO-YR."(21st cent.)"MO-DY-YR."Time:   "HH:MM:SS.AP"(AP is am or pm, if active)Timer:"MM:SS.HH"(HH is 1/100sec)Annunciators:noneData:User-Visible:Smallest:.00000001Largest:99999999Signif.-Digits:8Internal:Smallest:1E-99Largest:9.999E99Signif.-Digits:8You can't enter exponential values, butthe watch displays results >= 1E7 or< 1E-4 in scientific form.Time entry range is from 00:00:01 to99999:59 (no sec).Date entry range is from 1 Jan 1900to 31 Dec 2099.Data-Types-and-Sizes:numberdate MM/DD/YY (or MM/DD/YY),w/21st cent indicatortime HH:MM:SS.hh w/am/pm indicatorMemory:Named-Registers:M, D, S, T, A, displayFlags:see stateRegister-Usage:noneNumbered-Registers:0Program-Steps:0Program-Editing:noneProgram-Display:noneUser-RAM-Bytes:6Total-RAM-Bytes:30.5ROM-Bytes:2048 10-bit words on two chips,2560 bytes totalMachine-State:operating modeXpending opYis constant?memorydatedate modetimetime modealarm timealarm on/offstopwatch timeFile-Types:nonePhysical:Technology-Used:CMOSProcessor:48-bit, similar to -35As but with sleep modeChip-Count:6, equivalent to 38,000 transistorsPower-Source:3 357 cells; two for the display andone for the watch; changing thedisplay cells does not cause time/memory lossContinuous-Memory:sort ofExpansion-Ports:noneI/O-Ports:piezo speakerClock:yesLength:?Width:?Height:?Weight:170 gTemperature-Range:Operating:0 to 55 deg C (note that since it it wornon a wrist, watch temperature will remainclose to body temperature even in verycold weatherCharging:N/AStorage:-40 to 75 deg C (no batteries)-40 to 55 deg C (with batteries)Keyboard:Switches:noneShift-Keys:^, ?, aboveUser-Defined-Keys:noneKey-Arrangement::****************************Key-Labels-Base-Keyboard::R01234S.56789C:+-x\-:=pD/A^M%TNote that the R, S, D, A, M and T keys can be pressed with a finger.All others require use of the stylus.  R and S are depressed slighly toprevent accidental presses.Key-Labels-^-?-above::[][][][][][][][][][][][][][]DW21-/+<-->T>>Ta[][][][][][][]Programmable-Operations::noneNon-Programmable-Operations::%percentage+addition: in date mode, does calendar arithmetic; in time modedoes time arithmetic-subtraction: in date mode, does calendar arithmetic; in time modedoes time arithmetic-/+change sign/separate date fields^ /compute day of year0-9enter digit.enter decimal point; also separates seconds from 1/100 seconds21specify a date in the 21st century:separate time fields<-->exchange first and second numbers=complete calculation>Tconvert HMS to decimal hoursaindicate am timeAalarm function; show alarm time^ Astore number into A as alarm timeA ^ Areset/disable alarmCclear last entryC Cclear the calculatorDdate function (mode)^ Dstore number into D as dateD ^ .toggle MM/DD/YY and DD/MM/YYDWcompute day of the weekMrecall memory^ Mstore into M; in stopwatch mode and watch running, takessplitpindicate pm timeRreads (turns on) display; in stopwatch mode and watch stopped,resets stopwatch; in stopwatch mode and watch running, takessplitStimer/stopwatch function; also starts watch^ Sstore number into S as stopwatch timeS =returns to dynamic calculationTtime (watch) function; show time; in stopwatch mode and watchrunning, inhibits stopwatch display but leaves watch running^ Tstore number into T as time (number as HH:MM:SS)T ^ .toggle am/pm and 24 hour modeT>convert decimal hours to HMSxmultiplication^shift\-:divisionMenus::noneBugs/ROM-Versions::From Ken Sumrall, HP Cupertino Systems Lab, ken@cup.hp.com in Jan 1996:As for bugs, there are two that were discovered after the watch wasreleased.  I discovered one myself, and I tracked down the person whowrote the HP-01 firmware (he still works for HP) and asked him ifthere are any more.  Here is my original question and his reply:> BTW, were there any bugs in the released watch?  I think I recall playing> with it when I got it, and found it was not possible to enter the date> Feb. 29, 2000 from the keyboard, but all date calculations did work correctly,> and Feb. 29, 2000 would be displayed if you added 1 day to Feb. 28, 2000.>Here again, I am really straining.  I seem to recall only two bugswere discovered after we released the product.  The leap year day 2000that you pointed out was one of them.  The other one was more obscure,but also a bit more serious.  You may or may not know that one of thelittle features of the watch was that you could multiply or divide therunning stopwatch by a number and see the result (stopwatchinterpretted as a decimal number of hours) updated in the display oncea second.  Handy to watch your long-distance charges mount up in realtime, for example...  Unfortunately, if you foolishly decide to dividethe running stopwatch by zero, you do not get a neat clean flashingdisplay error so you can fix the problem.  The watch locks up and thecode goes off to never, never land.  It requires a hard reset orbattery removal to recover in a reasonable amount of time :(Notes::HP's only watch.There was a "Macys" branded version.Composite operations:X op Y = (op = +,-,x,\-:)X op Y =, then Z =, etc. (op = +,-,x,\-:)X op Y % = does net amount (op = +,-)X x Y % = does percentageX \-: Y % = does percentX op Y ^ T does adjust clock (op = +,-)S op X = does hourly rate math (op = x,\-:)Although not intended for underwater use, it had been designed towithstand immersion to 10 m for 5 min at 25 deg C.Will operate in magnetic fields to 60 gauss.Jeremy Smith's price list also shows:modelintroducedatprice changedtodiscountinued-02A1977-07-01$7501978-07-01$8501980-01-01-03A1977-12-01$7501978-07-01$8501980-01-01-04A1978-06-01$6501980-01-01-05A1978-06-01$7751980-01-01-06A1978-06-01$7751980-01-01-07A1978-06-01$6951980-01-01Don't know what the models represent.The Wall of Fame lists a 1978-07-01 introduction date.  This is believedto be wrong, but it's hard to argue with.Newsgroups: comp.sys.hp48From: frank@arcglade.demon.co.uk (Frank Wales)Subject: Re: Please tell me of the HP 01 calculator/watch. Date: Sat, 2 Oct 1993 23:24:13 +0000Message-ID: <749618071snz@arcglade.demon.co.uk>>In article <28dmn1$63f@shasta.wwc.edu> frohro@wwc.edu (Rob Frohne) writes:>>I just was reading the HP Journal issue on the 48SX and noticed>>that HP made a model HP 01 calculator watch.  ... Does an RPN >>calculator watch really exist?I think National Semiconductor showed an RPN scientific calculator watch inthe late 70s, but I'm not sure it ever came to market.  The HP-01 usesthe Other System, with percentages, automatic constant and a memory.In article <z6$@byu.edu> RHELPS@caedm.et.byu.edu writes:>...The big problem with all those LED watches was power consumption of >course, so they all had buttons you had to push to see the time.  >They were never very popular.The LED watch market, such as it was (and they did sell), was killed stonedead when watches with LCDs appeared.>The HP01 was BIG.  As I remember about 1/2 inch thick.  It appeared to be >gold or gold plated and came with this "free" slimline pen.  1/2 inch thick is about right.  It contained three batteries, one forthe timekeeping functions and two to power the display.  Gold or steel finishes were available.>The back of the pen was just the right size to push the tiny buttons.  Four of the buttons are pushable with a fingernail (to display the time,date, alarm or stopwatch/timer).  The rest need a stylus; there is astylus built into the clasp, in addition to the pen one.>I don't think it was a very impressive calculator.  It just had 4 basic >functions I think.  However, it is the only calculator watch I know of that properly integrated the functions of the unit (the calculator had access to the calendar for work with times and dates, and the stopwatch could use the calculator toupdate the display in non-second intervals [the manual provides the example of watching the actual cost of a phone call in cents ticking over in the display]).  Much better than just having a calculator and a timepiece with no relationship beyond being implemented in one case.>It was also very expensive.  Hundreds of dollars.It still is.  You try buying one today.  [HP-01s gratefully received.]-- Frank Wales, ArcGlade Services Ltd, Kingston, UK [frank@arcglade.demon.co.uk]