website/content/museum/tandy-radio-shack-trs-80-pc-4.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
Tandy Radio Shack TRS 80 PC-4	Computers	Pocket	Japan	1982	HD61913 CMOS VLSI	name image company company_name specs tabs photos links docs comments related oc_id source TRS 80 PC-4 /media/museum/photos/tandy_pc4_system_s1.jpg /companies/tandy-radio-shack Tandy Radio Shack label value NAME TRS 80 PC-4 label value MANUFACTURER Tandy Radio Shack label value TYPE Pocket label value ORIGIN Japan label value YEAR 1982 label value END OF PRODUCTION Unknown label value BUILT IN LANGUAGE Basic interpreter label value KEYBOARD 53 keys with numeric keypad label value CPU HD61913 CMOS VLSI label value SPEED 455 kHz ceramic resonator used as system clock label value RAM 1 KB (544 bytes for Basic programs) up to 2 KB label value ROM 12 KB label value TEXT MODES 1 line x 12 chars plus a 4 digit seven segment display part label value GRAPHIC MODES None label value COLORS Monochrome LCD label value SOUND None label value SIZE / WEIGHT 165 (W) x 71 (D) x 10 (H) mm / 116 g (with batteries) label value I/O PORTS 12-pin expansion port for printer and cassette interface\ 11-pin internal slot for memory module label value POWER SUPPLY 2 x CR-2032 lithium batteries label value PERIPHERALS 1 kB RAM PACK, cassette interface, mini thermal printer (from Tandy or Casio) label value PRICE Unknown photos links docs title subtitle text image PROMOTIONAL BOX /media/museum/photos/tandy_pc4_box_s1.jpg title url text RadioShackCatalogs.com http://www.RadioShackCatalogs.com Here, you can actually/virtually flip-through the pages to view the content of every RadioShack catalog! title url cover text PC-4 OWNER'S MANUAL null /media/museum/docs/couvs/tandy_pc4_%20owners-manual.jpg **PC-4 OWNER'S MANUAL**\ written by Radio Shack  compiled/archived by Unknown\  type of document : ZIP\  size : 5,3 MB\  source : [Ira Goldklang's TRS-80 Revived Site](http://www.trs-80.com) title url cover text PC-4 SERVICE MANUAL null /media/museum/docs/couvs/tandy_pc4_service-manual.jpg **PC-4 SERVICE MANUAL**\ written by Radio Shack  compiled/archived by Wade Fincher\  type of document : ZIP\  size : 3 MB\  source : [Ira Goldklang's TRS-80 Revived Site](http://www.trs-80.com) title url cover text PRINTER/CASSETTE INTERFACE FOR TANDY POCKET COMPUTER http://www.trs-80.com/trs80-hw.htm /media/museum/docs/couvs/tandy_pc1_printer-cassette-interface.jpg [**PRINTER/CASSETTE INTERFACE FOR TANDY POCKET COMPUTER**](http://www.trs-80.com/trs80-hw.htm)written by Radio Shack  compiled/archived by Wade Fincher\  type of document : PDF\  size : 495 KB\  source : [Ira Goldklang's TRS-80 Revived Site](http://www.trs-80.com) **... READ THE ONLINE VERSION BY CLICKING BELOW :** title url cover text PC-4 CASSETTE INTERFACE OWNER'S MANUAL null /media/museum/docs/couvs/tandy_pc4_%20cassette-interface-owners-manual.jpg **PC-4 CASSETTE INTERFACE OWNER'S MANUAL**\ written by Radio Shack  compiled/archived by Unknown\  type of document : ZIP\  size : 2 MB\  source : [Ira Goldklang's TRS-80 Revived Site](http://www.trs-80.com) author date text Sanjin Grandić (Croatia) Thursday 10th November 2022 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. author date text Greg Bzdell (Canada) Monday 24th May 2021 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. author date text jds Thursday 14th March 2013 Rich, I''m interested in the interface. What would you sell it for? author date text Rich H (Ohio USA) Saturday 5th January 2013 is there any value to these anymore? got computer, printer and cassette interface all in good condition. frcwrx@msn.com author date text Edward (Russia) Tuesday 29th November 2011 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.\ 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? author date text Paradroyd (Missouri, USA) Tuesday 3rd May 2011 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. author date text User (Russian Federation) Friday 19th June 2009 Looks similar to Electronica MK-85 made in USSR (1986) http://www.leningrad.su/museum/show_calc.php?n$172\ http://ru.wikipedia.org/wiki/$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\ http://mk85.narod.ru/about.htm /museum/tandy-radio-shack-trs-80-pc-1 /museum/tandy-radio-shack-trs-80-pc-2 1003 url date https://web.archive.org/web/20230608084457/http://www.old-computers.com/museum/computer.asp?c=1003 2023-06-08

The Tandy PC-4 Was a rebadged version of the Casio PB-100.
Apart from the brand/model plate, the design and features was identical to the original Casio model.