From: Baltissen, GJPAA (Ruud) (ruud.baltissen_at_abp.nl)
Date: 2004-09-09 11:08:21
Hallo Marko,
> By the way, why do you need the "tya" in the code?
The remains of some debugging I forgot to erase. Same for using address
$0000 as temporary storage for Y. I had problems with receiving data and I
tried all kinds of tricks. At the end it appeared that I addressed an empty
drive :(
> Or the sei and cli?
IIRC this was used in the original C= routine as well. I also wondered as I
thought that SEI would block timer interrupts. Then how could the computer
find out about time-outs?
> Maybe in the screen memory, to give some visual feedback
> to the user, like in Fast Hack'em on the Commodore 64.
Why didn't I think of this nice idea? The debugging mentioned above was in
fact displaying info on the screen.
--
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/ / |_/ Groetjes, Ruud
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\___| URL: Ruud.C64.org
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