HD63C09E CPU Upgrade for Coco 3 (or 2 or 1)
Who is it for? It’s for Coco 3 owners who want to upgrade the processor from a 68B09E to the Hitachi HD63C09E to take advantage of increasingly advanced new software like Nitros/09 and new games from Nick Marentes. I can upgrade your CPU, or CPU and re-cap the motherboard at the same…
Coco RS-232C Interface
Who is it for? It’s for Coco owners who want a reliable high-speed RS232 port which leaves the bit-banger serial port free to connect a printer. My repro Coco RS232 Pak is fully compatible with the old R.S Deluxe RS232 program pak cat. no. 26-2226 but made from new components and with gold plated…
TRS-80 Coco disk controllers EXPLAINED
http://youtu.be/nU0oEOVIL0k
How to change the RAM badge on Model III, 4 and Coco
http://youtu.be/pe2t0zVNYac