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Tandy Radio Shack
TRS 80 PC-4

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.

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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.

Thursday 10th November 2022
Sanjin Grandić (Croatia)

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.

Monday 24th May 2021
Greg Bzdell (Canada)

Rich, I''m interested in the interface. What would you sell it for?

Thursday 14th March 2013


MANUFACTURER  Tandy Radio Shack
TYPE  Pocket
YEAR  1982
BUILT IN LANGUAGE  Basic interpreter
KEYBOARD  53 keys with numeric keypad
SPEED  455 kHz ceramic resonator used as system clock
RAM  1 KB (544 bytes for Basic programs) up to 2 KB
ROM  12 KB
TEXT MODES  1 line x 12 chars plus a 4 digit seven segment display part
COLORS  Monochrome LCD
SIZE / WEIGHT  165 (W) x 71 (D) x 10 (H) mm / 116 g (with batteries)
I/O PORTS  12-pin expansion port for printer and cassette interface
11-pin internal slot for memory module
POWER SUPPLY  2 x CR-2032 lithium batteries
PERIPHERALS  1 kB RAM PACK, cassette interface, mini thermal printer (from Tandy or Casio)
PRICE  Unknown

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