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8580 glitches

Open NS-Clone opened this issue 2 months ago • 1 comments

some sids plays completely wrong when 8580 is selected (about 12% checked) when it works in 6581 mode well (not c64 environment) and it's looks like not adsr bug it's produces random waveforms types and wrong frequencies

it may be something timing related bcz if i extremely slow down cpu sound becomes better also i even tried to add some 1000t waits after every out-s (3.5MHz z80) but it do nothing...

also i tried fresh clean version of sources -O0 maybe "make clean" too results same

also i checked emulator's output log and at least frequency registers are same

after i replaced this new version by old resid-0.16 one from https://github.com/simonowen/resid

and here 8580 works without any glitches (8580 filters can be hear)

some comparison old and new version (tune not used filters at all) resid_recs.zip

some wrong sids (some one can be with adsr bug instead) wrong_sidz.zip

NS-Clone avatar Oct 16 '25 17:10 NS-Clone