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Krill
Registered: Apr 2002
Posts: 2852 |
Release id #200011 : Softwired
Okay, so there were some unexpected raster glitches on Mibrishow.
Thing works just fine on my main realthing machine, ofc., and i did test oldcia vs newcia on x64sc (was too lazy to dig out even older realthings to test).
I'm on this mystery. =) |
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Krill
Registered: Apr 2002
Posts: 2852 |
Mibri did a bit of investigation, and we're now sure it's all just an artefact of the capture/streaming pipeline.
The capture device seems to unconditionally convert C-64's non-interlaced 50 Hz video to interlaced, which would then be de-interlaced for streaming again, which can then produce visible glitches like in this example.
Pretty sure some similar threads exist already, but now the question is, what would be a good (and reasonably inexpensive) capture device for streaming C-64 content? =) |
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MagerValp
Registered: Dec 2001
Posts: 1059 |
A RetroTink 2X and one of those new cheap HDMI capture sticks from eBay. Surprisingly good. |
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mankeli
Registered: Oct 2010
Posts: 110 |
Does anyone know what this does to require x64sc? |
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Krill
Registered: Apr 2002
Posts: 2852 |
Uses Quiss' ingenious extremely small stable-raster timer setup with Copyfault's refinements, exploiting different behaviour of an "illegal" instruction in the face of badline DMA: .cerror * != $08a3, "sync not at $08a3"
sync = * + 1
ldx #$9e
ldy #8
cpx #0
bne syncSee this insane thread: Shortest code for stable raster timer setup with TL;DR =)
(On x64, the loop just never terminates, as this special behaviour isn't emulated.) |
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mankeli
Registered: Oct 2010
Posts: 110 |
Amazing! Thanks for the answer :D |
