Sharp PC-1211

Sharp PC-1211

The Sharp PC-1211 is a pocket computer marketing by Sharp Corporation in the 1980s. The computer 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. Users could write computer programs in BASIC.

A badge-engineered version of the PC-1211 was marketed by Radio Shack as the first iteration of the TRS-80 Pocket Computer.

Technical specifications

  • 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

Accessories

  • CE-121 Cassette Interface
  • CE-122 Printer

TRS-80 Pocket Computer ("PC-1")

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 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.

See also

References

  1. ↑ "TRS 80 PC-1". old-computers.com. 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.
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