TRS-80 Expansion Interface click test explained
https://youtu.be/bAVbggazp0U
June 2017
I write about the PMC 50/40 Interface used for connecting a System-80 to a Radio Shack Expansion Interface, how to repair a Model III or 4 keyboard which has been damaged in transit, and talk about the Line Printer II.
March 2017
I write about how to make a Printer Cable for the Model I/III/4/4D/4P/1000, discuss making Mappa-1 work with the RS Double Density Adapter, and talk about the Line Printer I.
December 2016
I write about Color Computer disk drives, SOLE for the Model I and the New_PERC doubler, and how to install a FreHD Auto Boot Eprom into the Model 4P portable computer.
The RE-FD502 Coco FDC running on a Coco 3
https://youtu.be/-SHWJINk10w
The New_Perc Double Density Adapter for the Model I
https://youtu.be/mcdGd8QOppI
The NewBuff cable for the Expansion Interface for the TRS=80 Model 1
https://youtu.be/iexYpqT4uZM
The RE-FD502 Coco FDC running ADOS 3 and DragonDos
https://youtu.be/SqVCJHyi-0Y
Serial adapter cable for the TRS-80 Model I
https://youtu.be/x_lm_ZlUcd8
September 2016
I write about the long white-case Color Computers, how to repair your Model III/4/4P Serial port, and how to upgrade Model 4 Gate-Array and 4D computers with the Auto-boot FreHD Eprom.