It has two 6522's and a 6526.
VIA1 $1800-180F serial bus
VIA2 $1C00-1C0F drive mechanism
CIA1 $4000-400F fast serial bus
The only thing used in the 6526 is the parallel port B, SP, and CNT.
Since the system uses this port for fast communication, it may reset your
information during normal operation. You may have to load a routine to
the drive memory that disables the system interrupts in order to use the
TOD.
On Wed, 25 Oct 2000, COPLIN, Nicholas. wrote:
> doesn't a 1571 use a VIA, ie 6522?? which doesn't have a TOD, but a normal
> counter...
>
> > -----Original Message-----
> > From: Andrew Vardy [SMTP:avardy@roadrunner.nf.net]
> > Sent: Wednesday, 25 October 2000 11:19
> > To: cbm-hackers@dot.tml.hut.fi
> > Subject: TOD on CIA
> >
> > I tried writing to the TOD on the CIA on a 1571. Then read, and the time
> > hasn't changed. What's up? I did remember to read tenth of seconds.
> >
> > -
> > This message was sent through the cbm-hackers mailing list.
> > To unsubscribe: echo unsubscribe | mail
> > cbm-hackers-request@dot.tml.hut.fi.
>
>
> PLEASE TAKE NOTE:
>
> The contents of this email (including any attachments) may be
> privileged and confidential. Any unauthorised use of the contents
> is expressly prohibited. If you have received this email in error,
> please advise us immediately (you can contact us by telephone
> on +61 8 9441 2311 by reverse charge) and then permanetly
> delete this email together with any attchaments. We appreciate
> your co-operation.
>
> Whilst Orbital endeavours to take reasonable care to ensure
> that this email and any attachments are free from viruses or other
> defects, Orbital does not represent or warrant that such are free from
> computer viruses or other defects.
>
> (C) 2000: Orbital Engine Company (Australia) PTY LTD and its
> affiliates
> -
> This message was sent through the cbm-hackers mailing list.
> To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
>
-
This message was sent through the cbm-hackers mailing list.
To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
Archive generated by hypermail 2.1.1.