Re: Commodore D9090 help

From: Jacob <lindberg.jacob_at_gmail.com>
Date: Tue, 16 Jun 2015 09:01:11 +0200
Message-ID: <CAJqRqNhPkFe__6W6x8pBJ7ddiAMDR6UQ_hzmNcRokR7JD1Gv-w@mail.gmail.com>
Thanks all! I'll try dumping the roms and compare them to known ones after
work for starters.

Best regards
Jacob
 Den 16 jun 2015 07:56 skrev "Spiro Trikaliotis" <
ml-cbmhackers@trikaliotis.net>:

> Hello,
>
> * On Tue, Jun 16, 2015 at 05:29:37AM +0000 Baltissen, GJPAA (Ruud) wrote:
> > Hallo Jacob,
> >
> >
> > > Any thoughts?
> [...]
>
> > The only thing that pops up in my mind is that the I/O coupled to the
> > second CPU is bad. The second CPU waits for some results but doesn't
> > get them back. The first CPU waits on the second one and therefore
> > won't reply on requests of the user.
>
> The 8250 is know to cause this behaviour if the R/W head of the drive
> is broken. In this case, there is no data from the disk, and the drive
> waits forever.
>
> The behaviour is similar to the "killer tracks" on the 1541, although
> these have another, but similar reason.
>
> The same can happen if the drive motor is broken, for example: Again,
> no data comes in, and the drive waits forever.
>
> Perhaps, the D9090 which comes from a similar time frame has the same
> issue?
>
> Regards,
> Spiro.
>
> --
> Spiro R. Trikaliotis
> http://www.trikaliotis.net/
>
>        Message was sent through the cbm-hackers mailing list
>


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Received on 2015-06-16 08:00:06

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