|Re: [hatari-devel] TCB 24 hours screen in Syntax Terror|
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Le 23/06/2019 à 10:23, Laurent a écrit :
I don't know if this was already discussed here, but I've seen a thread
in Facebook about the "TCB 24 hours screen" in the Syntax Terror demo
that doesn't work under Steem (the screen seems to show an offset in the
I've tested under Hatari (nearly latest version), and it seems that I
have the same rendering problem.
yes it's a known problem ; the overscan doesn't use a stabiliser on one
of the line, which confuses the shifter on a real ST and the coder
didn't notice this mistake and compensated it by shifting the bitplane
But Hatari so far assumes it's a "good" overscan line with usual number
of bytes, so the shifted bitplane in ram appear shifted on screen too.
There're several demos with this kind of bug ; for example "ultimate
dist" in the Ventura demo
This can be resolved one day when emulating the low level work of the
shifter, but it's not done yet.