Sharp PC-1211

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Sharp PC1211. This example exhibits a display that is failing.
CE-122 printer in travel case.
Rebadged "TRS-80 Pocket Computer" version.

The Sharp PC-1211 is a small handheld computer. It was powered by two 4-bit CPUs laid out in power-saving CMOS circuitry. One acted as the main CPU, the other dealt with the input/output and display interface.

A badge-engineered version was marketed by Radio Shack as the original model of the TRS-80 Pocket Computer line.

Technical specifications[edit]

  • 24 digit dot matrix LCD
  • Full QWERTY-style keyboard
  • Integrated beeper
  • Connector for printer and tape drive
  • Programmable in BASIC
  • Uses four MR44 1.35 V Mercury button cells
  • Battery life in excess of 200 hours
  • 1424 program steps, 26 permanent variable locations (A-Z or A$-Z$) and 178 variables shared with program steps
  • Built out of off-the-shelf CMOS components, including SC43177/SC43178 processors at 256 kHz and three TC5514P 4 Kbit RAM modules


  • CE-121 Cassette Interface
  • CE-122 Printer

TRS-80 Pocket Computer ("PC-1")[edit]

A badge-engineered version of the Sharp PC-1211 was marketed by Radio Shack as the original TRS-80 Pocket Computer. (This was later referred to as the "PC-1" to differentiate it from subsequent entries (PC-2 onwards) in the TRS-80/Tandy Pocket Computer line.)[1]

Introduced in July 1980, the PC-1 measured 175 × 70 × 15 mm and weighed 170 g, and had a one-line, 24-character alphanumeric LCD.[2][3]

The TRS-80 Pocket Computer was programmable in BASIC, with a capacity of 1424 "program steps". This memory was shared with variable storage of up to 178 locations, in addition to the 26 fixed locations named A through Z.

Programs and data could be stored on a cassette tape through an optional external tape interface unit. A printer/cassette interface was available, which used an ink ribbon on plain paper.


  1. ^ "TRS 80 PC-1". Retrieved 2015-03-05. Nowadays, it is often referred to as the TRS-80 PC-1, so as to differentiate it from its successor, the TRS-80 PC-2 (and following) 
  2. ^ "Radio Shack Pocket Computer". Retrieved 4 August 2011. 
  3. ^ "TRS-80 Pocket Computer PC-1". Personal Computer Museum. Retrieved 4 August 2011. 

External links[edit]