C64-C128 CP-M Cartridge Interest

[Tony Duell]

[PF10]

> > 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.

> 
> > [1] 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.

-tony