• Source: Sharp PC-1211

The Sharp PC-1211 is the first pocket computer ever released, marketed by Sharp Corporation in March 1980. 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, the TRS-80 Pocket Computer (model PC-1), was marketed by Radio Shack in July 1980 as the first iteration of the TRS-80 Pocket Computer with just a marginally different look (outer plastic parts in black, not brown, gray display frame)




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.
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.
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. The implementation was based on Palo Alto Tiny BASIC.
Programs and data could be stored on a Compact Cassette through an optional external cassette tape interface unit. A printer/cassette interface was available, which used an ink ribbon on plain paper.





















See also


Sharp pocket computer character sets




References






External links



Sharp PC-1211 on MyCalcDB (database about 1970s and 1980s pocket calculators)
www.promsoft.com/calcs Sharp Pocket Computers
Daves Old Computers - TRS-80 Pocket Computer
The TRS-80 Pocket Computer

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