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keirf / greaseweazle

Tools for accessing a floppy drive at the raw flux level
The Unlicense
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8" Floppy: extra empty tracks in the image #415

Closed gotcha-z80 closed 8 months ago

gotcha-z80 commented 8 months ago

Hello,

When I dump a 8" floppy that has 77 tracks as a SCP image, I get extra empty tracks. It's not always the same number. Usually, I get between 126 and 130 tracks in total instead of the expected 77 tracks. Any idea what is going on ?

The command I use for a single sided floppy is the following:

gw read --drive=1 --revs=3 --tracks=c=0-76:h=0 test.scp

I attach an example displayed with HxCFloppyEmulator

dump8pouces

keirf commented 8 months ago

There is confusion around how to represent a single-sided SCP image. You could try latest beta/snapshot of HxC software, or you can produce a "legacy" single-sided SCP image: gw convert test.scp test_legacy.scp::legacy_ss

gotcha-z80 commented 8 months ago

I've tried with the Beta HxC software, and I get a correct display with 77 tracks.

Is there today a consensus with Jean-Francois Del Nero on how to represent a single sided floppy in SCP ?

In other words, can I consider what the greaseweazle generates as a valid dump, and start exclusivelly using the beta version of the HxC software ?

dump8pouces - beta

keirf commented 8 months ago

Yes, I believe we came to agreement some time ago. I'm not sure how often the non-beta download gets updated -- the beta is often the best one to go for.