athrxx 78ec256cca SCUMM: (FM-TOWNS) - fix bug no. 12560 ("[FM Towns] scrolling much too slow")
(partly revert fb8f1084)

There is no simple solution that would still  leave the "butter smooth" scrolling for faster platforms intact. I have measured times between several code points to find any bottlenecks. My finding is that even single script opcodes may well take over 200ms to execute. And exceeding a singe 60 Hz tick happens way more often (which makes the scrolling fall behind and have to catch up, thus becoming a bit sloppy). So, for the "butter smooth" scrolling I'll probably implement a timer for the screen updates (which will then really behave much more like the interrupt handler of the original). But that's for a separate commit. This one is mostly about the bug ticket..
2021-05-22 14:24:54 +02:00
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