---
title: Tandy Radio Shack TRS 80 PC-4
categories:
- Computers
types:
- Pocket
origins:
- Japan
years:
- '1982'
cpus:
- HD61913 CMOS VLSI
params:
  name: TRS 80 PC-4
  image: /media/museum/photos/tandy_pc4_system_s1.jpg
  company: /companies/tandy-radio-shack
  company_name: Tandy Radio Shack
  specs:
  - label: NAME
    value: TRS 80 PC-4
  - label: MANUFACTURER
    value: Tandy Radio Shack
  - label: TYPE
    value: Pocket
  - label: ORIGIN
    value: Japan
  - label: YEAR
    value: '1982'
  - label: END OF PRODUCTION
    value: Unknown
  - label: BUILT IN LANGUAGE
    value: Basic interpreter
  - label: KEYBOARD
    value: 53 keys with numeric keypad
  - label: CPU
    value: HD61913 CMOS VLSI
  - label: SPEED
    value: 455 kHz ceramic resonator used as system clock
  - label: RAM
    value: 1 KB (544 bytes for Basic programs) up to 2 KB
  - label: ROM
    value: 12 KB
  - label: TEXT MODES
    value: 1 line x 12 chars plus a 4 digit seven segment display part
  - label: GRAPHIC MODES
    value: None
  - label: COLORS
    value: Monochrome LCD
  - label: SOUND
    value: None
  - label: SIZE / WEIGHT
    value: 165 (W) x 71 (D) x 10 (H) mm / 116 g (with batteries)
  - label: I/O PORTS
    value: |-
      12-pin expansion port for printer and cassette interface\
      11-pin internal slot for memory module
  - label: POWER SUPPLY
    value: 2 x CR-2032 lithium batteries
  - label: PERIPHERALS
    value: 1 kB RAM PACK, cassette interface, mini thermal printer (from Tandy or Casio)
  - label: PRICE
    value: Unknown
  tabs:
  - photos
  - links
  - docs
  forum_thread: 977
  photos:
  - title: PROMOTIONAL BOX
    subtitle: ''
    text: ''
    image: /media/museum/photos/tandy_pc4_box_s1.jpg
  links:
  - title: RadioShackCatalogs.com
    url: http://www.RadioShackCatalogs.com
    text: Here, you can actually/virtually flip-through the pages to view the content of every RadioShack catalog!
  docs:
  - title: PC-4 OWNER'S MANUAL
    url: null
    cover: /media/museum/docs/couvs/tandy_pc4_%20owners-manual.jpg
    text: |-
      **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: PC-4 SERVICE MANUAL
    url: null
    cover: /media/museum/docs/couvs/tandy_pc4_service-manual.jpg
    text: |-
      **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: PRINTER/CASSETTE INTERFACE FOR TANDY POCKET COMPUTER
    url: http://www.trs-80.com/trs80-hw.htm
    cover: /media/museum/docs/couvs/tandy_pc1_printer-cassette-interface.jpg
    text: |-
      [**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: PC-4 CASSETTE INTERFACE OWNER'S MANUAL
    url: null
    cover: /media/museum/docs/couvs/tandy_pc4_%20cassette-interface-owners-manual.jpg
    text: |-
      **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)
  related:
  - /museum/tandy-radio-shack-trs-80-pc-1
  - /museum/tandy-radio-shack-trs-80-pc-2
  oc_id: 1003
  source:
    url: https://web.archive.org/web/20230608084457/http://www.old-computers.com/museum/computer.asp?c=1003
    date: '2023-06-08'
---

The Tandy PC-4 Was a rebadged version of the Casio [PB-100](/museum/casio-pb-100/).\
Apart from the brand/model plate, the design and features was identical to the original Casio model.