Re: sys/dev/isa/fd.c FDUNIT/FDTYPE

[Hauke Fath <hauke%Espresso.Rhein-Neckar.DE@localhost>]

At 10:53 Uhr -0700 5.5.2011, John Nemeth wrote:
>} land (and my current intent is only to have the content of some four
>} shoeboxes full of (mostly ten-sector) Atari floppies more readily
>
>     These are actually readable on a standard PC style floppy drive?

That's "Atari ST" (68k) standard MFM, as opposed to the 6502 based
predecessors, which IIRC were closer to Apple II and Commodore formats. The
ST shipped with a 68k MSDOS 2.0 clone.

Because of the WD1772 controller's properties, and on certain floppy
drives, people managed to squeeze up to 12 sectors on a track with
custom-made formatters that reduced the inter-sector gaps.

        hauke


(who wrote another "late NetBSD floppy driver" for the Macintosh IWM)


--
"It's never straight up and down"     (DEVO)