8-bit acorn hardware • Re: Independent power for 5.25 floppy

Apologies, but I'm not sure an ATX supply is actually that straightforward to use to power a drive alone, FWIW - you a.) need to short two of the pins to start them up (they're soft power-on), and b.) have a sufficient load for it to remain on - see https://www.electronics-tutorials.ws/bl ... upply.html, for example.

Definitely depends on the atx supply - I have one that's happy enough just with being plugged into a drive and having the "power on" wire grounded.

@Angus - to use the atx supply, once you've worked out how to get it to "switch on", you need to pop the lid on your floppy drive, remove the molex->beeb aux power cable and then attach the drive power cable from the atx supply directly to the floppy drive.

We have power!

Greaseweasel is connecting, the drive clunks away, but I'm obviously not doing something correctly....

gw read --format=acorn.adfs.640 disk1.adf --drive=0

returns

Reading c=0-79:h=0-1 revs=2
Format acorn.adfs.640
T0.0: IBM MFM (0/16 sectors) from Raw Flux (68245 flux in 413.86ms)
T0.0: IBM MFM (0/16 sectors) from Raw Flux (102309 flux in 620.46ms) (Retry #1.1)
T0.0: IBM MFM (0/16 sectors) from Raw Flux (102309 flux in 620.43ms) (Retry #1.2)
T0.0: IBM MFM (0/16 sectors) from Raw Flux (102308 flux in 620.41ms) (Retry #1.3)
T0.0: Giving up: 16 sectors missing


I have my HxCFloppyEmulator ready to deal with a raw image .... I feel so close ... !!!

Statistics: Posted by AngusH — Tue Apr 22, 2025 6:03 pm

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