Compaticard (was: Any AMIGA users?

From: Fred Cisin <>
Date: Mon Dec 31 23:34:41 2001

On Mon, 31 Dec 2001, Richard Erlacher wrote:

> Then why the statement, " But it's still a 765. As such, it can not do GCR,
> ...?" That's the only reason I mentioned GCR at all.

The "only a 765" was in rebuttal to the possibility that the Compaticard
would have "significant" additional capabilities over other disk
controller cards. In other ways besides the issue of Amiga under

Neither major family of disk controller chips can do GCR.
GCR, hard sectoring, etc. are merely SOME of the limitations of an FDC.

But the problem with AMiga isn't GCR. It's MFM without the WD structure.
In the case of 765 v WD, the WD "raw" track read v the parsed read of the
765 becomes significant.
The WD can be used to do Amiga, but with a few complications. Handling of
stuff that could be misinterpreted as commands to do address marks might
be one.

> Clearly, I misinterpreted the key issue.
Only in terms of the central issue of R/W Amiga.

> Happy New Year!

Have a good one

Grumpy Ol' Fred
Received on Mon Dec 31 2001 - 23:34:41 GMT

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