Model: 38G General: Name: Graphics Calculator Code-Name: Elsie Family: Student Logic: expression Features: scientific, programmable, date arithmetic, hyperbolics, complex matrix, vector, lists, solver (algebraic), symbolic math, symbolic integration, differentiation, plotting, graphics Firsts: hard cover, split screen, ApLets, implied multiplication, numeric table view of equations, hang tag box, cardboard packaging Introduction: Date: 1995-04-06 Price: $118 Discontinuation: Date: <2003-01-01 Price: ? Production-Run: ? Display: Type: LCD, bit-mapped Size: 8 lines x 22 chars, 64 x 131 pixels Number-Formats: sign, 12 mantissa, ., exp sign, 2 exp see data types Annunciators: <\ shift active \Ga alpha keyboard active ((.)) alarm has gone off or low battery hourglass busy /\ --> transmitting data \/ Data: User-Visible: Smallest: 1E-499 Largest: 9.99999999999E499 Signif.-Digits: 12 Internal: Smallest: 1E-49999 Largest: 9.99999999999999E49999 Signif.-Digits: 15 Data-Types-and-Sizes: subset of the HP48G series Memory: Named-Registers: A..Z, \GT real C0..C9 statistics data E0..E9 equations F0..E9 functions G0..G9 GROBs L0..L9 list M0..M9 matrix R0..R9 polar S1fit..S5fit statistics U1..U5 sequences X0..X9 parametrics Y0..Y9 go with X... Z0..Z9 complex Flags: -17 to -18 trig mode 0)degrees 1)radians 2)grads -45 to -48 set number of digits -49 to -50 display format 0)STD 1)SCI 2)FIX 3)ENG -51 fraction mark comma Register-Usage: see below Numbered-Registers: none Program-Steps: memory Program-Editing: insert or replace Program-Display: alpha User-RAM-Bytes: 32K (~22K available) Total-RAM-Bytes: 32K ROM-Bytes: 512K Machine-State: stack user memory named programs File-Types: none Physical: Technology-Used: CMOS Processor: Yorke (00048-80063, 4 MHz) Chip-Count: 5 (Yorke CPU, 2x KS0104 (display column driver), 512K ROM (labelled "ELSIE OTP Rev 1.67", version may change), 32K RAM) Power-Source: 3 AAA cells Continuous-Memory: yes Expansion-Ports: 0 I/O-Ports: 4-wire serial, I/R I/O, beeper, overhead display out (on rest of 10 pins in the serial connector) Clock: yes Length: ? Width: ? Height: ? Weight: ? Temperature-Range: Operating: 0 to 45 deg C Charging: none Storage: -20 to 65 deg C Keyboard: Switches: none Shift-Keys: shift, turquoise, above alpha, coral, lower right User-Defined-Keys: 6 menu keys Key-Arrangement:: ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ***** ** ** ** ** * *** *** *** *** * *** *** *** *** * *** *** *** *** * *** *** *** *** Key-Labels-Base-Keyboard::       PLOT SYMB NUM ^ LIB VAR MATH <| v |> HOME SIN COS TAN X,T,\GT \v/x y ENTER ( ) -x x A..Z 7 8 9 /  4 5 6 * DEL 1 2 3 - ON 0 . , + (The ON key has a coral lower label of CANCEL.) Key-Labels-Shift-Turquoise-Above::       |-----SETUP-----|     VIEWS NOTE SKETCH    -1 MODES ASIN ACOS ATAN x n\v/x 2 ANSWER CHARS EEX ABS x a..z LIST ( ) LOG x  MATRIX [ ] 10 CLEAR NOTEPAD SPACE \pi LN x OFF PROGRAM : ; e Key-Labels-Alpha-Coral-Lower-Right::                 A B C D E F  G H I J  K L M N  O P Q R  S T U V  W X Y Z Programmable-Operations:: basic operations not listed Undocumented or imperfectly-documented operations: @...@ enclose comments helpwith ... provides minimal help on a command rules names of the design team members syseval ###(decimal) 535863 return amount of free memory 535393 send a Kermit "Finish" version shows ROM version libeval 171;0 shows ROM version Non-Programmable-Operations:: Replace the contents of G0 with the current screen graphic (i.e., do a screen dump) by: press ON press PLOT release ON release PLOT Menus:: not listed Bugs/ROM-Versions:: Initial versions are Libeval 171;0 Version HP38-A1.67 Copyright HP, 1993,95 Version Version HP39-A Copyright HP, 1993,95 Notes:: [ Someone want to volunteer to fill in the above not listed items? ] "Elsie" refers to a cow used in the advertising of a major food chain (presumably Borden). Announced Apr 6-8 1995 at the National Council of Teachers of Mathematics (NCTM) 75th annual conference in Boston MA. A special edition was produced for this conference. "ApLet" expands to "Animated Personal LEarning Tool". Rumor: the product number (38) was chosen to be a combintion of 32 and 48. If so, this will be a "doubly referential" product number reference (see the Notes section on the 48SX). Serial communications is a little tangled. - Selecting "HP 38G" selects I/R. It uses an (as yet) undocumented protocol for transferring data between two 38Gs. Xmodem is used as the basic protocol. - Selecting "Disk drive..." selects wire. It expects a Kermit server set up as: set baud 9600 set parity none set file collision off server - The "Send now" does the send/receive. The "Pick location..." lets you move around in the server's directory tree. You can print a graphic image (screen dump) with the HP82240B Infrared Printer. You do this by first storing the image in a graphic variable, then doing a PRVAR. See Non-Programmable Operations above. If one were to take a 38G apart, one could replace the 32KByte RAM chip with a 128KByte one and it might well work (hint, hint). One might also kludge up a card connector... (Later, courtesy of Detlef Mueller, email@example.com) I'm just into that, both (changes are) impossible w/o further modifications and a new ROM: the build-in 32k memory is mapped to address F0000-FFFFF, a bigger chip would just do nothing and cause trouble if the RAM is mapped away temporarily to access the underlaying ROM. Forget about the card connector, before doing that, I'd suggest to buy a '48GX... Steve Dunham (firstname.lastname@example.org) posted the following to Comp.sys.hp48 on 7 Sep 1995: Gavin Scott (email@example.com) wrote: : It's Algebraic rather than RPN based. This isn't as bad as it sounds. : You enter an expression the way you would type it in a programming : language (all on one line, with parenthesis, etc.) and when you press : ENTER the line is evaluated (and added to the 'stack' in the display : left-justified), and the result displayed on the 'stack' (right- : justified). : There is no compatibility with the 48 series by the way. : There is bidirectional IR (2 inch range limit), and what looks like : a 100/200LX style serial connector (but the manual does not tell you : what it is anywhere that I can find). When you send or receive something : your only options are to communicate via IR with another 38G (this : implies no way to communicate with a 48), or to a 'Disk Drive' which : I would guess means the serial port (I haven't tried plugging in : anything to see if it might be any kind of standard protocol). You can transfer some things via IR between the HP38 and HP48. The protocol used over the IR port on the HP38 is Xmodem. You can transfer single objects between the calculators, you can't current transfer Aplets because they are sent in multiple pieces using a slightly modified Xmodem protocol. The 38 uses a different header, so the objects end up as strings on the 48. I have a modified version of the HP48 XSEND routine that will transfer these strings back to the 38. (It works like XSEND, so you have to put an indentifier on the stack and run my program.) I'll attach it to the end of this message, because it is fairly small. The normal XRECV will work for receiving single part objects. If you try to receive a multipart Aplet, you will only get the first part, which contains a list with the Aplet name and names of all of the other pieces of the Aplet. I do intend to write a program that will transfer entire Aplets via IR between the 48 and 38, but it may take a while, because I have a serial cable for the 38 already. Serial communications on the 38 are handled via Kermit. The 38 will first create/read a file called HP38DIR.000 from the PC, which contains a table translating object names to MS-DOS filenames. Aplets are stored in multiple pieces on the PC. You could also transfer via serial between the 488 and 38 if you make a cable. HP has given MSU a few of the serial cables (really widgets to convert a 48 serial cable to a 38 serial cable), making one is rather simple because (looking at the end of the calculator) the four pins on the left side of the bottom row on the 38 connector have the exact same pinout at the four pins on the 48. I've made my own cable from this info. . . . . . . . . . . \_____/ | \- These four pins Transfers done to the PC are done in Ascii mode whenever possible, transfers done via IR are always in Binary mode. This brings us to the format of the HP38 header. All Objects start with the string `HP38' followed by either `Bin' or `Asc' followed by a single character denoting the type of object being transfered. `A' is used for the HP38DIR.000 file, always ASCII mode `B' is used foor binary Aplet data, which is always transfered in binary mode 'C' is used for notes sent as a character string `D' is for User programs on the 38, transfered as a character string object (Bin mode on IR - ASCII on serial) `E' is used for list and matrix objects `I' Is used for the 'index' that is sent as the first object in a multipart IR transfer. If you transfer via IR, you will find out that the prolog addresses for these objects (list, array, real, complex, cstring) are the same as on the 48. Following this character, in binary mode, is the body part of an identifier object i.e. 2 nibbles specifing length and a bunch of characters. This contains the name of the object. After that is the object proper. (prolog and all) In ASCII mode a space, an (ASCII) integer specifying length, space then the name follow the header. Within the next couple of days I will be posting my first impressions of the 38G from the prospective of a 48 user (not the target audience of the 38). Have fun making your serial cables, Steve firstname.lastname@example.org ------------------------------------------------------------ From: "Joseph K. Horn" <JoeHorn@HolyJoe.Net> Newsgroups: comp.sys.hp48 Subject: 6.0030000004 and 38 and 48 Organization: Holy Smoke Incense Company Message-ID: <P3c0a.44287$NV.email@example.com> Date: Wed, 5 Feb 2003 09:42:32 -0800 The slide-on cover of the HP38G (high-school version of the HP48) has the mysterious number 6.0030000004 molded into the plastic. Its mathematical meaning has eluded the best and brightest, but not me! It was derived from the number 48 and 38. I have discovered a simple proof which unfortunately this newsgroup is large enough to contain: (190423*ASINH( 48 ) - 148144*ASINH( 38 ))/37911 = 6.0030000004 Golly. -Joe-
Last modified Saturday, 2012-02-25T17:29:40-06:00.