Re: System Errors and SCSI

[dempson@atlantis.actrix.gen.nz (David Empson)]

In article <753315514wnr@klatch.demon.co.uk>,
John Le Febvre  <John@klatch.demon.co.uk> wrote:
> dempson@atlantis.actrix.gen.nz (David Empson) writes:
> >     0911 cantSync
> > 
> > indicating that it is an error from toolset 9 (Apple Desktop Bus), and
> > the specific error is "cannot synchronize".  (It means that the CPU
> > was not able to synchronize communciation with the keyboard
> > microcontroller, possibly due to the keyboard micro having gone nuts.)
> 
> Aha!  Distinctly possible as my keyboard is a bit faulty.  It tends to
> put two 4's in for each key press every so often, also the 'down-arrow'
> key is similarly affected.  A minor annoyance.

Sorry, I should have been clearer.  By "keyboard microcontroller", I
meant "ADB microcontroller", which is on the IIgs motherboard.  It is
responsible for communicating over ADB, including automatic polling of
the keyboard and mouse.

The ADB microcontroller interfaces to the computer through a general
logic chip, which deals with synchronizing data transfers.

The error is most likely to mean that the IIgs was not able to
communicate with the ADB microcontroller.  It might be used to
indicate an ADB communication error, but this less likely.

[I'll have to ruminate on your SCSI problems before giving any more
comments.]

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand