C64-C128 CP-M Cartridge Interest
ard at p850ug1.demon.co.uk
Mon Dec 27 13:12:36 CST 2010
> > It's also odd in that it's a 40cylinder (67.5 tpi) device.
> its first generation 3.5", also runs slower data rate.
Is it? I thought it turned at 300rpm and used 250kbps MFM recording like
most 3.5" drives of the time.
> >  The microcontorller has failed. Even though it's ROMless, this is not
> > much of a help. Finding the right version i nthe right package after all
> > thses years has proved impossible. I am darn sure it's the
> > microcontroller in that I pulled the ROM and forced NOPs onto the data
> > bus, and it still had an address bus that looked crazy.
> 6303 is easy to find, I have a few from old defunct HDs.
This, as I am sure you know, is a PQFP package. it also has to be the
right version to get the I/O ports it needs. I still have the dead chip,
I can post the number if anyone thinks they could get one.
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