Hello Ruud,
>It is nice to know that my module could work if I added those buffers but
>with no explanation I'm not very willing to do that. What still puzzles me
>is: why does the garbage only appear during loading??? If there is a
>conflict with the VIC, why does the garbage not appear during normal
>operation?
The CIA chips I've heard (I think it was some discussion on the SCPU's
design) has some different access characteristics, and the host CPU needs to
be compatible. During a LOAD CIA#2 is used. Have you tried something like
this to see if the conflict is to do solely with the CIA? If so, you should
get the garble characters.
loop
lda $DD00
jmp loop
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 permanently
delete this email together with any attachments. 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 is explicitly
the case
(C) 2000: Orbital Engine Company (Australia) PTY LTD and its
affiliates
Message was sent through the cbm-hackers mailing list
Archive generated by hypermail 2.1.1.