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ZFDC drive question



All —

Now that my 8086 system is humming along, I want to get the ZFDC working. Since the diagnostic program is Z80-only, I’ve gone back to the Z80 for the moment.

Which kind of floppy drives are people using? For vintageness, I wanted to start with the Tandon TM100-2A  (the 5.25” drive used in the original IBM-PC), but when that didn’t respond to the diagnostic commands, I changed to a YE380 (5.25” 1.2MB drive, from a PC/AT) I had on the shelf. That drive didn’t respond either. 

I have been through the pinouts and jumpers, so, before I go absolutely crazy, I’d like to check mine against someone with a working configuration. I won’t be using 8” drives with this configuration, so the 5” floppy drives will be A and B.

Thanks!

Rich

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Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator