Icky wrote: ↑
Sun Oct 11, 2020 9:42 pm
I finally got round to looking at this project again this weekend and have made progress. The Sparkalaphobia board is now almost matching a stock BLITTER.
I have run @Cyprian's test programs and the patterns are a little different to the original BLITTER so may be there is something that can be tweaked to get this to 100%.
great news looks almost perfect.
I wonder about two things:
- "1st image" - the right part - marked "Sprahlaphobia". CPU bars (white/grey/red) above the BLiTTER activity are skewed but should be straight like those below the BLiTTER activity area. Looks like something delays the CPU by 4 cycles (one bus access) each line.
- "2nd image" are you sure they are marked correctly? For me the right part, marked "Sprahlaphobia" is actually the real STE, and the left part is "Sprahlaphobia" - there the CPU starts the BLiTTER 4 cycles (1 bus access) later.
sporniket wrote: ↑
Mon Oct 12, 2020 3:52 am
==> Does the wakestate have an influence on the result ?
they shouldn't but who nows
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