RE: D9060 Help Needed

Hallo Jim,

 
> and any subsequent command gives "74, DRIVE NOT READY..."

At one time I had four 9060's and one 9090 at my place. Only one had a
working (what I call) "middle board" (the board is in the middle,
between the hard disk and the CBM board, the one equiped with the two
6502's). This middle board translates the SASI signals coming from the
CBM board into MFM. Just have a good look at it and you understand why I
didn't think about even to try to repair it.

This board is also the reason why I disassembled FDC-ROM to find out how
the SASI protocol works. The idea behind it is quite simple: replace
this "middle board" with a micro-controler and an IDE hard disk or SD
card. But so far I wasn't able to understand the protocol :( For those
who say "SASI is like SCSI", I know, but this knowledge didn't help me
very much.


--
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   / /  |_/     Groetjes, Ruud
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    \___|       URL: Ruud.C64.org


 



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