Search found 4 matches

by Perpetual_Neophyte
17 May 2019, 05:55
Forum: Workshop
Topic: TRS-80 Model 4P
Replies: 9
Views: 345

Re: TRS-80 Model 4P

The keyboard itself has a 20-pin connector and no ICs, so I believe the keyboard cable carries a parallel key matrix signal and the controller resides on the motherboard. On page 7 in the manual you linked, it says that it was scanned by the CPU. All other 8-bit computers did likewise, AFAIK. The C...
by Perpetual_Neophyte
16 May 2019, 04:20
Forum: Workshop
Topic: TRS-80 Model 4P
Replies: 9
Views: 345

Re: TRS-80 Model 4P

Sounds pretty cool, so just a modern computer with retro look? Most of my systems are ships of Theseus anyway so I gave up trying to figure out what counts as a different computer a long time ago. You should see my desktop - it's an IBM Aptiva that originally rocked a Pentium II that's been consist...
by Perpetual_Neophyte
15 May 2019, 15:39
Forum: Workshop
Topic: TRS-80 Model 4P
Replies: 9
Views: 345

Re: TRS-80 Model 4P

:shock: what are you going to do with the System? It's getting upgraded to modern components - the original CRT is cracked and the motherboard is fried. I doubt it's reparable without cannibalizing another one. I've had it for a long time, used to do my budget in Visicalc on this thing back in high...
by Perpetual_Neophyte
15 May 2019, 07:24
Forum: Workshop
Topic: TRS-80 Model 4P
Replies: 9
Views: 345

TRS-80 Model 4P

I'm looking to adapt a keyboard from a TRS-80 4P to USB. As near as I can tell, there are no purchasable adapters to accomplish this, so I'll have to program a small microcontroller like a teensy or arduino to handle it. https://i.ibb.co/PYS2sDP/59910750-925553564450805-4941789319237992448-n.jpg The...

Go to advanced search