1581 Followup: Let's get this thing working! (and figure out why it isn't)

Comprehensive video, thank you. I have a couple of PC drives sitting and doing nothing. I would like to use one of them as an external (DF1) drive for my A500+, can you please give the github link to that converter PCB you built?

Your step by step approach and attention to detail is your brilliance. I just might have a go at making one of these for myself. Thank you for such an informative video.

Great video and research! Thanks!

I recently got to the bottom of my 1581 issue, but it wasn't as complex as yours. In the end, my DIY 1581 with the Sony MPF920 was working all along. The main issue was that my C16 uses a 6502-based CPU with adaptor circuitry, and that I was testing with JiffyDOS. There is nothing wrong with JiffyDOS, but the CPU adapter frustratingly doesn't work with it (confirmed via other users of the same board). Once I switched to using the stock kernal, all directory and SEQ file load corruption/hangs ceased.

Well done chap, great perseverance although I may be a little wary of those brick type psus for the 1581 as there's no filtering or reservoir, bung a load on it and scope that bad boy and see it is rippling its tits off.......

As I mentioned in a comment to your last 1581 replica video I had some trouble with bad switches in these SFD-321B drives. I noticed that the one of your drives having problems with the disk change randomly started the motor - this could be related to faulty switches.

I also think that the adapter PCB is not a replacement for a proper conversion: None of the two circuits you have shown creates a proper timing for the ready signal. In one case it's just synchronized to the index pulse, but that doesn't guarantee the drive is up to speed and stable. The index pulse can arrive from nearly 0 rotations to 1 rotation after the motor has turned on and the drive selected. The other circuit does no timing/synchronization at all.

Really COOL work!🤩