Re: Reading/writing floppies for C64 and MS-Dos ???

Skybuck Flying wrote:
> http://trixter.wordpress.com/2008/09/28/the-diskette-that-blew-trixters-mind/
>
> Kinda interesting.
>
> This describes marking sectors as bad in an interleaved fashion so it might
> work on C64 and MS-Dos... fat 12 floppies ?
>
> Question is... does it actually work ?
>
> Makes me wish I still had a C64 to try it out ! :)
>
> Anyway how much thruth is there in this story...
>
> I think C64 floppies worked by burning something onto it... while PC
> floppies work with magnetic stuff ?
>
> Or am I mistaken in that part ? ;)
>
> Or is this just a software only trick ? Hmm...
>
> Bye,
>   Skybuck.
>
>
The C64 FDC simply used a different format using DIFFERENT HARDWARE
which made them incomptible.
Yes, the Commodore had a drive that could read and write both
formats, because BOTH FDCs were incorporated, and the hardware was
flexible sufficently to write both formats.
NO BURNING, idiot!
Older PC FDCs had a command where one could write deleted sectors,
but at some stage in "improvement" of ASICS (part of which the FDC is
emulated) that command got dropped (early in 586 production, so use an
original PC or 286, 386 or 486).
BTW, without the "deleted sector" command, the "newer" PCs can
neither read nor write them.

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Skybuck Flying (30.09.2008 13:43)

Skybuck Flying (30.09.2008 13:49)