RE: IEC CBM 720

From: Professor Dredd (profdredd_at_yahoo.com)
Date: 2001-04-24 01:01:03

I don't know.

I'll have to refer this one to Marko, David or someone
with more insight  :-/

Guys ?!?

--- Bo Zimmerman <bo@zimmers.net> wrote:
> Well, there are DEFINITELY 6526 chip(s) in there.
> 
> Hmmm... you know, considering the fact that the A000
> BASIC ROM has like 4K
> of room at the back end (at least in the 128K
> version...), this might be a
> very interesting future project.  Are there any
> timing issues in the CBM-II
> machines as there are in the 64/VIC that might make
> this impossible?  Surely
> someone has tried this though, if it were that
> simple.
> 
> - Bo
> 
> -----Original Message-----
> From: owner-cbm-hackers@dot.tml.hut.fi
> [mailto:owner-cbm-hackers@dot.tml.hut.fi]On Behalf
> Of Professor Dredd
> Sent: Monday, April 23, 2001 5:40 PM
> To: cbm-hackers@dot.tml.hut.fi
> Subject: RE: IEC CBM 720
> 
> 
> I don't know anything about the 710/720, so its
> difficult to answer.
> 
> What drives the datasette on this computer? If its a
> 6522 or 6526, then presumably the same hardware
> MIGHT
> be used to drive an IEC buss.
> 
> Once the necessary connections are made between the
> I/O chip and the DIN socket, you would have to write
> your own driver for the port. This would of course
> allow one to connect 1541 and 1525 type devices.
> That
> would be cool  ;)
> 
> --- Bo Zimmerman <bo@zimmers.net> wrote:
> > Well, I can't be certain, of course.  I've seen a
> > whole lot of hacks,
> > though, and if this is one, it is a very good one.
> > Especially in the
> > mounting of the ports in the back.
> >
> > Either way, as the picture demonstrated, a set of
> > three wires run from the
> > IEC ports to the datasette port.  This set of
> wires
> > has been cut cleanly,
> > rendering them useless.
> >
> > My question is more this:  Whether it was
> Commodore,
> > or a previous owner,
> > what was this person up to?  Is such a hack even
> > POSSIBLE in a 710/720?  Can
> > Commodore Serial disk drives be driven from the
> > lines in the datasette
> > port?!?!
> 
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