2 Jan
2003
2 Jan
'03
9:13 p.m.
On Thu, 2 Jan 2003, Peter C. Wallace wrote:
Yes, it can. But I'd rather not get into interrupt programming at this
point. Maybe at a later phase when I polish this up.
This is one
fast reader. But too fast for the 6502 me thinks.
Not really if you do one several possible things:
1. Generate an interrupt from the index mark (can the 6522/card do this?) 2. Put a oneshot or flip flop on the index mark signal
so its pulse can be
seen by the 6502...
Now that can be done pretty handily with the 6522. I can switch the IM
signal to one of the control lines, which will latch the signal. Good
idea ;)
Now I'll have to get that CA1 control line working for sure, which I've
been avoiding since it still seems dodgy, even with the pull-up. I'm
already using the CA2, CB1 and CB2 lines for other signals.
Sellam Ismail Vintage Computer Festival
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