yann64andClaude Opus 5.5
3eeabe9649
6,654 pages: 1,289 machines, 702 software, 460 companies, 64 history, 17 articles, 59 fun. 4,336 media files so far; references to files not downloaded yet are left out. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
162 lines
6.9 KiB
Markdown
162 lines
6.9 KiB
Markdown
---
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title: Tandy Radio Shack TRS 80 PC-4
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categories:
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- Computers
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types:
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- Pocket
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origins:
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- Japan
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years:
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- '1982'
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cpus:
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- HD61913 CMOS VLSI
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params:
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name: TRS 80 PC-4
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image: /media/museum/photos/tandy_pc4_system_s1.jpg
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company: /companies/tandy-radio-shack
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company_name: Tandy Radio Shack
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specs:
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- label: NAME
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value: TRS 80 PC-4
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- label: MANUFACTURER
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value: Tandy Radio Shack
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- label: TYPE
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value: Pocket
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- label: ORIGIN
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value: Japan
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- label: YEAR
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value: '1982'
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- label: END OF PRODUCTION
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value: Unknown
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- label: BUILT IN LANGUAGE
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value: Basic interpreter
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- label: KEYBOARD
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value: 53 keys with numeric keypad
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- label: CPU
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value: HD61913 CMOS VLSI
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- label: SPEED
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value: 455 kHz ceramic resonator used as system clock
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- label: RAM
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value: 1 KB (544 bytes for Basic programs) up to 2 KB
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- label: ROM
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value: 12 KB
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- label: TEXT MODES
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value: 1 line x 12 chars plus a 4 digit seven segment display part
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- label: GRAPHIC MODES
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value: None
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- label: COLORS
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value: Monochrome LCD
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- label: SOUND
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value: None
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- label: SIZE / WEIGHT
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value: 165 (W) x 71 (D) x 10 (H) mm / 116 g (with batteries)
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- label: I/O PORTS
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value: |-
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12-pin expansion port for printer and cassette interface\
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11-pin internal slot for memory module
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- label: POWER SUPPLY
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value: 2 x CR-2032 lithium batteries
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- label: PERIPHERALS
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value: 1 kB RAM PACK, cassette interface, mini thermal printer (from Tandy or Casio)
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- label: PRICE
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value: Unknown
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tabs:
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- photos
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- links
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- docs
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photos:
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- title: PROMOTIONAL BOX
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subtitle: ''
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text: ''
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image: /media/museum/photos/tandy_pc4_box_s1.jpg
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links:
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- title: RadioShackCatalogs.com
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url: http://www.RadioShackCatalogs.com
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text: Here, you can actually/virtually flip-through the pages to view the content of every RadioShack catalog!
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docs:
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- title: PC-4 OWNER'S MANUAL
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url: null
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cover: /media/museum/docs/couvs/tandy_pc4_%20owners-manual.jpg
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text: |-
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**PC-4 OWNER'S MANUAL**\
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written by Radio Shack
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compiled/archived by Unknown\
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type of document : ZIP\
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size : 5,3 MB\
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source : [Ira Goldklang's TRS-80 Revived Site](http://www.trs-80.com)
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- title: PC-4 SERVICE MANUAL
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url: null
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cover: /media/museum/docs/couvs/tandy_pc4_service-manual.jpg
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text: |-
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**PC-4 SERVICE MANUAL**\
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written by Radio Shack
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compiled/archived by Wade Fincher\
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type of document : ZIP\
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size : 3 MB\
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source : [Ira Goldklang's TRS-80 Revived Site](http://www.trs-80.com)
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- title: PRINTER/CASSETTE INTERFACE FOR TANDY POCKET COMPUTER
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url: http://www.trs-80.com/trs80-hw.htm
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cover: /media/museum/docs/couvs/tandy_pc1_printer-cassette-interface.jpg
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text: |-
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[**PRINTER/CASSETTE INTERFACE FOR TANDY POCKET COMPUTER**](http://www.trs-80.com/trs80-hw.htm)written by Radio Shack
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compiled/archived by Wade Fincher\
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type of document : PDF\
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size : 495 KB\
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source : [Ira Goldklang's TRS-80 Revived Site](http://www.trs-80.com)
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**... READ THE ONLINE VERSION BY CLICKING BELOW :**
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- title: PC-4 CASSETTE INTERFACE OWNER'S MANUAL
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url: null
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cover: /media/museum/docs/couvs/tandy_pc4_%20cassette-interface-owners-manual.jpg
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text: |-
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**PC-4 CASSETTE INTERFACE OWNER'S MANUAL**\
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written by Radio Shack
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compiled/archived by Unknown\
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type of document : ZIP\
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size : 2 MB\
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source : [Ira Goldklang's TRS-80 Revived Site](http://www.trs-80.com)
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comments:
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- author: Sanjin Grandić (Croatia)
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date: Thursday 10th November 2022
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text: I was born in 1966 and was living in Paris when this little "marvel." I was like 13-14 yrs old when my mother bought it for me it cost 778 FF (Francs frnçais)which was a quarter of the minimum agreed salary in France, so it was not cheap when it first came out but what a joy to have this in class, the teachers thought it was a scientific calculator (which it was lol) but so hand for history AND maths or other exams with the answers "hidden in the box" behind the looks of calculator lol. I wrote a short program that displayed a clock running late less than a sec per day in 45 minutes.
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- author: Greg Bzdell (Canada)
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date: Monday 24th May 2021
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text: I have a working Tandy PC-4 that belonged to my oldest brother. I popped some new batteries in 3 months ago and it worked. Nice to be programming in BASIC again.
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- author: jds
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date: Thursday 14th March 2013
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text: Rich, I''m interested in the interface. What would you sell it for?
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- author: Rich H (Ohio USA)
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date: Saturday 5th January 2013
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text: is there any value to these anymore? got computer, printer and cassette interface all in good condition. frcwrx@msn.com
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- author: Edward (Russia)
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date: Tuesday 29th November 2011
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text: |-
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MK-85 and Casio (or this Tandy) looks like two coins because soviet engineers simply take the interface modules (screen and keyboard) from cheaper pocket computer (Casio PB-100) and placed over their own platform $ PDP-compatible 16-bit chipset. Result is strange $ big computer (MK-85 can work with very big numbers $ over to 10^4000) is closed in calculator''s cage with small screen and ugly keyboard. Add there lack of any interfaces to make a program backup (there are no tape recorder or printer ports in MK-85) and you can fully imagine this strange pocket computer. Programs are saved in 2K volatile memory divided to ten parts without any chance to make a hardcopy.\
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Many of MK-85 still work today like new. Think, what today''s pocket devices can still work over 20 (MK-85 manufactured up to 1991) or near 30 years like Casio?
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- author: Paradroyd (Missouri, USA)
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date: Tuesday 3rd May 2011
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text: I have one of these that I bought new not too long after it was released in 1982. I used it in college classes and did some basic programming on it. The PC4 that I have still works fine in as of May, 2011. I just changed the batteries last year and powered it up to make sure it still works. I used to have the cassette interface for it too, but that was lost years ago in a move.
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- author: User (Russian Federation)
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date: Friday 19th June 2009
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text: |-
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Looks similar to Electronica MK-85 made in USSR (1986)
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http://www.leningrad.su/museum/show_calc.php?n$172\
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http://ru.wikipedia.org/wiki/$D0$AD$D0$BB$D0$B5$D0$BA$D1$82$D1$80$D0$BE$D0$BD$D0$B8$D0$BA$D0$B0\_$D0$9C$D0$9A-85\
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http://mk85.narod.ru/about.htm
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related:
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- /museum/tandy-radio-shack-trs-80-pc-1
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- /museum/tandy-radio-shack-trs-80-pc-2
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oc_id: 1003
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source:
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url: https://web.archive.org/web/20230608084457/http://www.old-computers.com/museum/computer.asp?c=1003
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date: '2023-06-08'
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---
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The Tandy PC-4 Was a rebadged version of the Casio [PB-100](/museum/casio-pb-100/).\
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Apart from the brand/model plate, the design and features was identical to the original Casio model.
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