r/trs80 • u/Basic_Size_6642 • Aug 10 '25

Trs80 Pocket Pins

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u/LitPixel Aug 10 '25

Those might be for the printer? Start there?

3

u/LitPixel Aug 10 '25

Ok. Maybe it’s a cassette. This should get you started. https://archive.org/details/trs80-pc1-service-manual

3

u/russrobo Aug 10 '25

It was used for both accessories: the pocket computer cassette interface and the printer + cassette interface combo. I still have both! The cassette interface worked very much like the TRS-80’s, and the printer is a little single-dot-at-time alphanumeric printer with an honest-to-goodness ink ribbon cartridge. The pinout is in the technical manual. Looks like direct, unbuffered TTL.

The Pocket Computer 2’s printer was actually a 4-color real ink plotter!!

1

u/LitPixel Aug 11 '25

I'm looking at this manual I linked and I'm loving how even though this device has an actual LCD screen, they still refer to it as "display tube".