I have been working on my TRS 80 Model III's for some time now. Plural. I own 3 of these monsters. All the innards relatively work (one dead keyboard). I have accumulated 3 Drive Controller Cards. One old style (much longer than the others with a bigger 4 prong power plug) and two regular ones. I have swapped chips, tried to find problems with a temp gun, used many different drive-to-card cables, and used several motherboard-to-card ribbons. I even hooked a HxC Floppy to it.
I have about 5 drives. NONE of the cards work with my floppy drives. I am 99% sure it's the cards.
My latest card gives me a "Diskette?" prompt with the HxC plugged in (closest I've ever been). Zaxxon is the only disk to boot, after you hit "L"oad new game the tracks count past available tracks! (ie, 120/80 on the HxC display)
The HxC is fine. I'm able to use it on a 4P. Although cool, a 4P is extremely annoying (disks need to be transferred to 4P format).
When plugged in, drives do light up and spin for about 5 seconds, but I get a "Cass?" prompt.
Is it possible to go 0 for 3 on Disk Cards? What really pisses me off is that for all this money I could have gotten a FreHD. However, that's "cheating" in my book.
Please help.