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prevent run-on execution, each program had to finish with the END command, unless run-on execution was desired. On Sharp-derived units, labels could be inserted into the program, usually single characters such that in Run mode, that program could be executed by depressing a special DEF key followed by the key of that character. This was equivalent to an explicit
620:, as well as access a certain memory location (37, possibly?) that controls the DEG/RAD/GRAD spots on the LCD. With judicious POKEs into the BASIC program text area more characters in the PC-8 character set can be discovered, including a `tilde` which also seems to function as a bizarre command. Some blank characters when
541:
information. Errors encountered either in program execution or calculation evaluation would be returned as one of 9 error codes, usually indicated by replacing the display with text such as "ERROR 4". On the PC-7 model the list of error codes was printed above the text keypad, and was included on the
462:
The Prog mode changed the input from a command line to a program editor. In this mode, BASIC programs could be entered one line at a time. Up and down arrow buttons were provided to scroll up and down through the program space. On most models, free calculations could not be entered in the Prog mode.
407:
In general, the two specific lines were not cross-compatible, but there were compatibilities within lines. PC-1 programs would work unmodified on the PC-3 and on the PC-8 with changes for screen size, and PC-4 (26-3650B) programs would run unmodified on the PC-5, PC-6 and PC-7. The PC-2 was a unique
473:
space. In order for multiple programs to exist on the device, they had to be written in different ranges of line numbers. For example, it was common to insert one program starting with line 100, and another program starting at line 200, etc. Valid line numbers in most models were from 1 to 999. To
533:
function commands for use in Run mode. However, on many Sharp derived models, a special AREAD command was added to BASIC which would assign the current value on the display line to a given variable, which could then be used in a program. Combined with a defined key, this allowed very quick custom
447:
The input of simple calculations would be aggregated on the command line, and no results would be displayed until the EXE key was pressed. In some models, a special ANS variable was provided to reuse the results of the previous calculation; in others, the previous calculation was automatically
520:
to the locations of the alphabetical variables, so A(2) pointed to the value of B, and so on. As a result, published programs for the device avoided the use of A as either an array or an alphabetical variable. On some models the entire variable space could be manipulated in this fashion.
511:
All user storage was taken from the same space, so allocation of arrays using DIM would decrease the available memory for program instructions, and vice versa. However, the storage space for one-character alphabetical variables was pre-allocated, and as a result the A
488:
to expedite the entry of BASIC commands as well as scientific function names. The most common commands would each be associated with a key, and the full command could be entered by depressing the special modifier key, followed by the associated key for the command.
542:
case of the PC-8, but with other models users not familiar with the meaning of each code would have to refer to the manual. Like other characteristics of this line, the meanings of the error codes were not necessarily equivalent from model to model.
389:. Character widths in these models varied from 12 characters in the PC-4 and PC-7 to 24 characters on most of the rest. The displays also included some way of indicating operational mode, scientific mode, and other states and conditions.
248:
and could print or plot on plain paper. The other print-capable models all used thermal paper, the PC-3 and PC-8 used one printer, while the PC-4, PC-5 and PC-6 used another. The PC-7 had no printer or cassette interface.
439:
Instead of an "equals" key to initiate calculation evaluation, an "EXE" (execute) key was provided. This caused confusion with those who were used to traditional calculators. The = character was used only for variable
771:
481:
In the Casio-derived models, the BASIC space was subdivided into segmented program spaces which could be numbered, cleared and executed manually, or could call each other.
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492:
In some models, BASIC and other commands would be converted into one-character tokens (converted to strings upon display) instead of being stored as whole strings.
780:
764:
366:. (The exception was the PC-7, which had a rectangular and alphabetically ordered keyboard, like most scientific calculators.) On some models, the
60:
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designs. In addition to providing users with scientific math functions in a small portable package, the devices also understood a form of the
659:
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The PC-3 and PC-8 had a couple of commands that were not listed in the manual, but nonetheless were recognized by BASIC and usable.
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107:
79:
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Although named after the TRS-80 line of computers, they were not compatible with any TRS-80 desktop computer and did not use the
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240:
later became known as the PC-1, as subsequent models were labelled PC-2 through PC-8. Some were made by Sharp, and the rest by
1027:
517:
86:
64:
630:- seems to be some type of test mode for the display. Will show a couple of patterns on the LCD and then appear to lock up.
478:
command to the first line number of that section of program, which was also a valid way to execute programs from Run mode.
441:
93:
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31:
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could be openly used to execute one-line, non-BASIC operations. This is the normal mode used, from where arbitrary
344:
75:
53:
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362:, to use for entering the names of scientific functions and programming commands, in addition to a traditional
508:
card (only for some models). The optional RAM cards varied in sizes from 1 KB, 4 KB and 8 KB.
340:
616:- the highest memory location is 2047, and it is possible to modify the BASIC program in RAM directly with
1001:
401:
811:
433:
713:
Sharp PC-1211 Sharp PC-1500 Sharp PC-1251 Casio PB-100 Casio FX-780P Casio FX-5200P Sharp PC-1246
408:
architecture and was the only unit in the line allowing direct memory access with POKE, PEEK and CALL.
505:
257:
The Tandy/TRS-80 model names are listed with the corresponding original Sharp or Casio model number.
319:
139:
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1045:
963:
328:
310:
301:
100:
292:
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386:
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1022:
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359:
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151:
Tandy PC-6 with 8 KB memory expansion card installed and a compatible cassette interface
853:
355:
147:
17:
1076:
948:
805:
513:
164:
30:"TRS-80 Pocket Computer" redirects here. For the original computer by the same name, see
196:
devices with different model names. They were given designations from PC-1 to PC-8. The
958:
800:
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had special significance in many units. For example, in the PC-8, the A array actually
363:
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265:
245:
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display, to show the current line of input text, or a segment of it containing the
367:
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370:
keypad had a different type, form factor, and location than the numeric keypad.
42:
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838:
636:- seems to be some type of test mode related to the optional Printer Interface
393:
379:
172:
182:
733:
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879:
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to 12 KB and up as far as 16 KB with the use of an available
624:'ed will display additional symbols on the printer if one is attached.
933:
913:
794:
537:
The program interpreter on the models did not provide human-readable
348:
175:
463:
Certain models, especially the Casio-derived ones, called this mode
432:
could be entered to receive results. The Run mode also allowed the
928:
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241:
193:
146:
138:
404:
were not accepted as with almost all BASIC programming machines.
475:
753:
781:
TRS-80 and Tandy-branded computers, clones and related systems
382:
36:
500:
The total memory capacity of the devices varied from 1
745:
All and more about the Sharp PC-1500 computer (TRS-80 PC-2)
744:
738:
448:
included if the next calculation began with an operator.
185:
CPU. Models in the Pocket
Computer line were actually
640:
Also, SHIFT-6 on the PC-8 will display a Yen symbol.
1010:
994:
893:
787:
590:
572:
554:
67:. Unsourced material may be challenged and removed.
739:Sharp PC-1500 computer (TRS-80 PC-2) resource page
416:Each model had two operating modes: Run and Prog.
339:Pocket computers were an advancement over early
244:(PC-4 through PC-7). The PC-2 had four colored
451:Some valid calculation input examples (PC-8):
765:
8:
436:of the BASIC programs stored in the device.
729:Tandy Pocket Computers at the Pocket Museum
696:
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692:
690:
688:
686:
684:
682:
680:
236:Although not branded as such, the original
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878:
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127:Learn how and when to remove this message
469:On the Sharp models, there was only one
454:SIN40 10+2+(8*1)/7 TAN (LOG (√(4/3)))
734:Floodgap Retrobits Tandy! Pocket! Mania
676:
484:Many of the devices included a special
400:statements, as lower-case commands and
396:characters. These were only for use in
1067:Computer-related introductions in 1980
704:. Ira Goldklang's TRS-80 Revived Site
378:The models provided a short one-line
7:
660:Sharp pocket computer character sets
444:, and evaluation tests in programs.
65:adding citations to reliable sources
529:It was not possible to define new
212:were designed by Sharp; while the
25:
865:Tandy 10 Business Computer System
280:Tandy/TRS-80 Pocket Computer PC-3
232:History, lineage and nomenclature
1041:
1040:
41:
665:Casio calculator character sets
52:needs additional citations for
1028:Tandy Video Information System
1:
262:TRS-80 Pocket Computer "PC-1"
289:TRS-80 Pocket Computer PC-4
271:TRS-80 Pocket Computer PC-2
32:TRS-80 Pocket Computer PC-1
18:TRS-80 Pocket Computer line
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392:The Casio models included
345:BASIC programming language
325:Tandy Pocket Computer PC-8
316:Tandy Pocket Computer PC-7
307:Tandy Pocket Computer PC-6
298:Tandy Pocket Computer PC-5
143:Tandy PC-8 Pocket Computer
29:
1036:
876:
702:"TRS-80 Pocket Computers"
228:were designed by Casio.
27:Line of pocket computers
341:programmable calculator
76:"Tandy Pocket Computer"
1002:Tandy Graphics Adapter
238:TRS-80 Pocket Computer
161:TRS-80 Pocket Computer
152:
144:
817:Tandy Pocket Computer
812:TRS-80 Color Computer
741:- much documentation.
546:Undocumented commands
157:Tandy Pocket Computer
150:
142:
61:improve this article
1046:RadioShack template
171:under the Tandy or
939:Mera-Elzab Meritum
347:. They included a
153:
145:
1054:
1053:
1023:Tandy Corporation
797:Model I & III
424:In Run mode, the
356:rubber capacitive
169:Tandy Corporation
137:
136:
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111:
16:(Redirected from
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1072:Pocket computers
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905:Original TRS-80
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854:TRS-80 Model 100
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165:pocket computers
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412:Operating modes
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246:ball point pens
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723:External links
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471:line numbering
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364:numeric keypad
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860:Tandy 1400 LT
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650:Sharp PC-1211
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360:membrane type
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329:Sharp PC-1246
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311:Casio FX-790P
308:
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302:Casio FX-780P
299:
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284:Sharp PC-1251
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275:Sharp PC-1500
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266:Sharp PC-1211
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78: –
77:
73:
72:Find sources:
66:
62:
56:
55:
50:This article
48:
44:
39:
38:
33:
19:
995:Technologies
964:CP 400 COLOR
954:Dragon 32/64
924:Colour Genie
870:TRS-80 MC-10
816:
712:
706:. Retrieved
639:
549:
536:
531:mathematical
528:
510:
499:
491:
486:modifier key
483:
480:
468:
464:
461:
450:
446:
438:
430:calculations
426:command line
423:
415:
406:
391:
377:
368:alphanumeric
354:, of either
338:
324:
315:
306:
297:
293:Casio PB-100
288:
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104:
97:
90:
83:
71:
59:Please help
54:verification
51:
984:Matra Alice
919:Video Genie
909:Aster CT-80
808:/12/16/6000
534:operation.
525:Other notes
465:WRiTe mode.
173:Radio Shack
1082:RadioShack
1061:Categories
1018:RadioShack
849:Tandy 3000
844:Tandy 2000
839:Tandy 1000
708:2015-03-05
671:References
442:assignment
394:lower-case
380:dot-matrix
117:March 2015
87:newspapers
434:execution
402:variables
1011:See also
969:Color 64
644:See also
601:location
583:location
565:location
352:keyboard
187:rebadged
178:brands.
167:sold by
959:MX-1600
949:CD-6809
518:pointed
335:Purpose
101:scholar
1077:TRS-80
934:Max-80
914:LNW-80
895:Clones
795:TRS-80
788:Series
622:PRINT#
598:memory
580:memory
562:memory
496:Memory
387:cursor
374:Design
349:QWERTY
253:Models
176:TRS-80
103:
96:
89:
82:
74:
974:VC 50
929:D8000
610:value
539:error
514:array
398:PRINT
242:Casio
194:Casio
190:Sharp
108:JSTOR
94:books
856:/200
832:PC-3
827:PC-2
822:PC-1
634:CK01
628:CK00
618:POKE
607:byte
592:POKE
589:and
574:PEEK
556:CALL
476:GOTO
458:Prog
226:PC-7
224:and
222:PC-6
218:PC-5
214:PC-4
210:PC-8
208:and
206:PC-3
202:PC-2
198:PC-1
192:and
155:The
80:news
604:},{
506:RAM
420:Run
383:LCD
358:or
183:Z80
159:or
63:by
1063::
711:.
679:^
571:;
502:KB
327:–
318:–
309:–
300:–
291:–
282:–
273:–
264:–
220:,
216:,
204:,
200:,
897:,
773:e
766:t
759:v
613:}
595:{
586:}
577:{
568:}
559:{
130:)
124:(
119:)
115:(
105:·
98:·
91:·
84:·
57:.
34:.
20:)
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