ncoplin_at_orbeng.com
Date: 2004-05-25 08:16:46
Hi Jim,
>Why send UNTALK over the wire? Can;t the peripheral just assume that
>when it completes sending data? I figure the answer has something to do
>with FILE reads, but I have not gotten there.
In most cases the peripheral does know when it finishes, afterall it sends
an EOI (tells the C64 the next byte is the last). In this case the UNTALK is
almost a confirmation. More importantly however, imagine this. You are
"loading" a program, then press RUN/STOP. The C64 has to tell the drive to
stop sending data. It signals ATN, with an UNTALK.
- Nick
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