RE: I'm ashamed to be asking this, but...

From: Bo Zimmerman (
Date: 2001-11-10 21:06:28

Hello Ruud,

Yes, there is a 720-D.  Take a look at it at:

About half-way down the page is a picture of the internal drive.  We also
know there was a 720-D due to it being printed on the boxes of other CBM-II
high profile machines.

As to your question, though: Yes.  I did connect it to another drive.  In
fact, I connected the internal 720 cable to the internal drive of my 8296D.
That worked fine.  The problem must be in the drive, I just don't know

- Bo

> -----Original Message-----
> From:
> []On Behalf Of Baltissen, R (Ruud)
> Sent: Friday, November 09, 2001 1:16 AM
> To: ''
> Subject: RE: I'm ashamed to be asking this, but...
> Hallo Bo,
> > I received the 720-D "disassembled".
> You mean there exists a CBM 720 with built in drives like the CBM 8296D?
> > The symptom is this:  I enter a drive command, the error
> > light comes on. No drive movement. If I THEN read the error
> > channel (?ds$) I get nothing.  If I read it directly
> > (input#1,a,a$,b,c) I get 0, blank, 0,0.
> Maybe a stupid question: what happens if you do
> (input#1,a,a$,b,c) without a
> drive attached? Your "0, blank, 0,0" looks like showing un-initialised
> variables ie. the showed data has not been read at all.
> My guess is that something on the I/O part is brooken, either the
> computer-
> or driveside. You can test wether part it is the drive or computer by
> connecting another drive or computer to the 720 and its drive. This
> crosstest should reveal which part is actually to blame.
> The fact that the error LED flashes means IMHO that it doesn't understand
> the command ie. the handshaking is alright so the trouble is in the
> databits.
>     ___
>    / __|__
>   / /  |_/     Groetjes, Ruud
>   \ \__|_\
>    \___|
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