Model: -01A General: Name: Wrist Instrument Code-Name: Cricket Family: none Logic: algebraic Features: - Firsts: algebraic, 4 function, watch, only HP calc w/o exponential notation entry Introduction: Date: 1978-7-1 Price: $650 steel case $850 gold tone case Discontinuation: Date: 1980-01-01 Price: $695 steel case ? gold tone case Production-Run: ? Display: Type: LED, 7 segment Size: 8 digits Number-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: none Data: User-Visible: Smallest: .00000001 Largest: 99999999 Signif.-Digits: 8 Internal: Smallest: 1E-99 Largest: 9.999E99 Signif.-Digits: 8 You can't enter exponential values, but the watch displays results >= 1E7 or < 1E-4 in scientific form. Time entry range is from 00:00:01 to 99999:59 (no sec). Date entry range is from 1 Jan 1900 to 31 Dec 2099. Data-Types-and-Sizes: number date MM/DD/YY (or MM/DD/YY), w/21st cent indicator time HH:MM:SS.hh w/am/pm indicator Memory: Named-Registers: M, D, S, T, A, display Flags: see state Register-Usage: none Numbered-Registers: 0 Program-Steps: 0 Program-Editing: none Program-Display: none User-RAM-Bytes: 6 Total-RAM-Bytes: 30.5 ROM-Bytes: 2048 10-bit words on two chips, 2560 bytes total Machine-State: operating mode X pending op Y is constant? memory date date mode time time mode alarm time alarm on/off stopwatch time File-Types: none Physical: Technology-Used: CMOS Processor: 48-bit, similar to -35As but with sleep mode Chip-Count: 6, equivalent to 38,000 transistors Power-Source: 3 357 cells; two for the display and one for the watch; changing the display cells does not cause time/ memory loss Continuous-Memory: sort of Expansion-Ports: none I/O-Ports: piezo speaker Clock: yes Length: ? Width: ? Height: ? Weight: 170 g Temperature-Range: Operating: 0 to 55 deg C (note that since it it worn on a wrist, watch temperature will remain close to body temperature even in very cold weather Charging: N/A Storage: -40 to 75 deg C (no batteries) -40 to 55 deg C (with batteries) Keyboard: Switches: none Shift-Keys: ^, ?, above User-Defined-Keys: none Key-Arrangement:: * * * * * * * * * * * * * * * * * * * * * * * * * * * * Key-Labels-Base-Keyboard:: R 0 1 2 3 4 S . 5 6 7 8 9 C : + - x \-: = p D / A ^ M % T Note 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 to prevent accidental presses. Key-Labels-^-?-above::               DW 21 -/+ <--> T> >T a        Programmable-Operations:: none Non-Programmable-Operations:: % percentage + addition: in date mode, does calendar arithmetic; in time mode does time arithmetic - subtraction: in date mode, does calendar arithmetic; in time mode does time arithmetic -/+ change sign / separate date fields ^ / compute day of year 0-9 enter digit . enter decimal point; also separates seconds from 1/100 seconds 21 specify a date in the 21st century : separate time fields <--> exchange first and second numbers = complete calculation >T convert HMS to decimal hours a indicate am time A alarm function; show alarm time ^ A store number into A as alarm time A ^ A reset/disable alarm C clear last entry C C clear the calculator D date function (mode) ^ D store number into D as date D ^ . toggle MM/DD/YY and DD/MM/YY DW compute day of the week M recall memory ^ M store into M; in stopwatch mode and watch running, takes split p indicate pm time R reads (turns on) display; in stopwatch mode and watch stopped, resets stopwatch; in stopwatch mode and watch running, takes split S timer/stopwatch function; also starts watch ^ S store number into S as stopwatch time S = returns to dynamic calculation T time (watch) function; show time; in stopwatch mode and watch running, inhibits stopwatch display but leaves watch running ^ T store number into T as time (number as HH:MM:SS) T ^ . toggle am/pm and 24 hour mode T> convert decimal hours to HMS x multiplication ^ shift \-: division Menus:: none Bugs/ROM-Versions:: From Ken Sumrall, HP Cupertino Systems Lab, firstname.lastname@example.org in Jan 1996: As for bugs, there are two that were discovered after the watch was released. I discovered one myself, and I tracked down the person who wrote the HP-01 firmware (he still works for HP) and asked him if there 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 bugs were discovered after we released the product. The leap year day 2000 that 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 the little features of the watch was that you could multiply or divide the running stopwatch by a number and see the result (stopwatch interpretted as a decimal number of hours) updated in the display once a second. Handy to watch your long-distance charges mount up in real time, for example... Unfortunately, if you foolishly decide to divide the running stopwatch by zero, you do not get a neat clean flashing display error so you can fix the problem. The watch locks up and the code goes off to never, never land. It requires a hard reset or battery 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 percentage X \-: Y % = does percent X 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 to withstand 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: model introduced at price changed to discountinued -02A 1977-07-01 $750 1978-07-01 $850 1980-01-01 -03A 1977-12-01 $750 1978-07-01 $850 1980-01-01 -04A 1978-06-01 $650 1980-01-01 -05A 1978-06-01 $775 1980-01-01 -06A 1978-06-01 $775 1980-01-01 -07A 1978-06-01 $695 1980-01-01 Don't know what the models represent. The Wall of Fame lists a 1978-07-01 introduction date. This is believed to be wrong, but it's hard to argue with. Newsgroups: comp.sys.hp48 From: email@example.com (Frank Wales) Subject: Re: Please tell me of the HP 01 calculator/watch. Date: Sat, 2 Oct 1993 23:24:13 +0000 Message-ID: <firstname.lastname@example.org> >In article <email@example.com> firstname.lastname@example.org (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 in the late 70s, but I'm not sure it ever came to market. The HP-01 uses the Other System, with percentages, automatic constant and a memory. In article <email@example.com> 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 stone dead 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 for the 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 a stylus 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 to update 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 [firstname.lastname@example.org]
Last modified Saturday, 2012-02-25T17:29:15-06:00.