Re: Strange CBM710 with 3.5" drive

So it was you who bid me out ... ;)
I wanted to see how the internal floppy drive works.

'Elektronikladen Detmold' still exists: http://elmicro.com/
Maybe someone there knows about the 'GDP 64K' ?


Christian



Am 13.06.2013 18:23, schrieb Michał Pleban:
> Hello!
>
> Today I picked up a strange CBM710 machine from eBay. Unfortunately it
> does not power on, but here's what I found:
>
> * There is a DIN5 socket at the back. It is wired to the User Port by
> two wires. It's not an IEC port (different pinout, too little wires).
>
> * There is an unknown adapter on the expansion port. It is wired to the
> video connector so I assume it's some kind of graphic adapter. There is
> an array of TTL glue logic there and one 40pin chip which has a big
> radiator glued on - I cannot unglue it so I don't know what chip this
> is. On the board are markings "GDP 64K" and "Elektronikladen 4930
> Detmeld 18". There are many manually resoldered wires on the board, one
> chip is even piggybacked on another.
>
> And, the most strange of all...
>
> * There is another board on the second expansion port, with an EPROM and
> SAB2793B chip, and attached to it is... a 3.5" floppy drive!!! It is
> mounted at the front, through a hole cut crudely through the front panel.
>
> As I said, it does not power up so I cannot test anything, so I'd
> appreciate any input on what these might be?
>
> Regards,
> Michau.
>
>
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-- 
Christian Dirks
Toast_r@Idealine.info



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