TJBChris | TRS-80 Model 16B Restoration - Diagnostics and Testing - Part V @TJBChris | Uploaded January 2022 | Updated October 2024, 7 hours ago.
Part V of my TRS-80 Model 16B restoration. In this video, I run the Model II/12/16/6000 Diagnostics on the system to test the RAM, PIO, DMA, and Interrputs. I also try booting CP/M, LS-DOS, TRSDOS 2.0b, and TRSDOS-II 4.2.5, with less-than-perfect results. I repeat some of the tests on the Model 12 for comparison purposes as well.

Be warned: This video has a couple instances of strong language. Whoops.

Music:
This video is just me jabbering. There's no music. Sorry...

Chapters:
Intro (0:00)
Hard Disk Interface RAM and CTC Interrupt Test (1:41)
Video Test (2:43)
Video RAM Test (3:22)
Shadow ROM Checksum (4:15)
RAM Tests (4:32)
PIO, CTC, DMA, and Interrupt Tests (6:14)
TRSDOS-II 4.2 Memory Test (8:51)
Testing TRSDOS-II (10:32)
Testing TRSDOS 2.0b/Teleterm (13:18)
Testing Lifeboat CP/M 2 (15:46)
CP/M Memory Test (18:10)
Testing LS-DOS (18:44)
Model 12 Comparison Tests (21:16)
Next Steps and Outro (23:38)

I do these videos unscripted, so I apologize if the in-the-moment descriptions of things are a bit scattered. If you have any questions/comments about this video, you can find me in any of these fine locations:

The Tandy Discord Server
The CoCoTALK! Discord Server
The TRS-80 Color Computer (CoCo) group on Facebook
The CoCo Crew Podcast group on Facebook
On the Vintage Computer Forums (vcfed.org)
The TRS-80 Models I-4/4P Group on Facebook
Tandy / Radio Shack Model II /12 / 16 / 16B / 6000 Owner's Group on Facebook

Thanks for watching!