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Krill
Registered: Apr 2002
Posts: 2857 |
Keeping a few bits of information in a hostile environment
If not reserving space in RAM, where would read-writable data be most likely to survive throughout the run-time of any random demo or game?
$D800-$DC00 is often overwritten entirely, $00/$01 in RAM are too cumbersome to access.
$DD03 (parallel port data direction register) might be good, or maybe the 2x4 CIA TOD registers at $DC08 and $DD08.
Or are they? What else could be usable for that purpose? =) |
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Copyfault
Registered: Dec 2001
Posts: 467 |
Quoting KrillMeanwhile, i have actually managed to query drivetype before uploading the appropriate piece of custom code. =)
All without any extra code on 1541 side or in the resident loader portion.
So no hiding nor manual shuffling-around of those two bits required. \=D/ This is worth a huge HOORAY!!!
Kudos for getting it done... and thanks for putting effort into it.
Shall I use that "most elegant"-phrase more often ;) ?? |
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Zibri
Account closed
Registered: May 2020
Posts: 304 |
Quote: The better your heuristics, the more (H)EUREKA! moments you'll have.
Precisely.
Eureka comes from the same verb (Eurisko) and it's the first person of the past tense: Literally: "I FOUND [it]" :D |
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