Questions tagged [trs-80]
Use for questions regarding the z80-based Tandy Radio Shack computers, the TRS-80 Model I, II, III, and 4. Computers using another processor, such as the 6809-based TRS-80 Color Computer, should use a different tag ([color-computer] in that case).
39 questions
3 votes
0 answers
151 views
Looking for TRS-80 4P terminal emulation software
I have a TRS-80 4P that works beautifully, and I'd love to set it up as a terminal to other equipment I own (a Linux server, or a PiDP-11), but I'm having trouble finding actual, functional terminal ...
- 31
11 votes
1 answer
598 views
Bank-switching a CoCo 2 to "All RAM" and back?
I'm trying to use all 64 KB RAM on a CoCo 2 emulated by "Jeff Vavasour's CoCo emulator" v1.6 on MS-DOS. The problem: a default CoCo 2 boot leaves at least 24 KB of the address space beyond $...
- 113
2 votes
0 answers
218 views
My TRS-80 CoCo (26-3004) displays only left half of game screen
Have looked online for answers and even asked r/trs80, but can't seem to figure this out. The computer cuts off the right half of the game being displayed. It doesn't seem to be an issue with hardware ...
- 121
7 votes
2 answers
1k views
In relation to the Tandy TRS-80 Model 1 and Model III, what are "ISAM" and "PDS"?
While working with the TRS-80 /CMD file format I came across a couple of terms used frequently, but for which I'm struggling to find any definitions. Here's an example from the trscmdff.txt, which may ...
- 8,214
7 votes
0 answers
542 views
Why did only the TRS-80 see complaints about the screen?
Of the 1977 trinity, the PET and TRS-80 came with monitors built around black-and-white TV tubes, and the Apple II was commonly used with a black-and-white TV set. According to https://en.wikipedia....
- 65.3k
3 votes
1 answer
590 views
Interpreting TRS-80 model 1/2 tape cassette audio
I got interested in writing my own code to parse tape cassette formats for a few platforms. I did OK with both Spectrum and Apple 2 tapes based on info I could find online. Speccy and Apple 2 seem to ...
- 8,214
6 votes
1 answer
637 views
Dumb Terminal Access to Tandy TRS-80 Model 100?
How do I setup the TRS-80 Model 100 to use an external 80col. 30 row dumb terminal so I can control the TRS-80 Model 100 ... BASIC from the dumb terminal? I have a VersaTerm connected to a VGA monitor ...
- 141
22 votes
4 answers
5k views
Why did the TRS-80 CPU have priority over the display?
The original TRS-80 had a separate bank of static RAM for video memory, so that there would be no interference between display and CPU when the CPU was just doing calculations in main memory. When it ...
- 65.3k