 No.18131
MetalGod Senior Tester
Nov 3, 2020, 23:11
edited on: Nov 3, 2020, 23:13
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It is not only a sound issue. The game runs faster in MAME |
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 No.18132
danylopez123 Tester
Nov 4, 2020, 06:16
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Seeing that Reference video, i did also saw some other things in it. Like when you begin a new game, it should be always random with the position and movement of everyone and stuff. Not to mention, it should also give the random chance if they block the ball or not, because as far i can tell with what i had, everyone gets hit without blocking. |
 No.18135
AJR Developer
Nov 5, 2020, 19:41
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The whole driver suffers from a problem similar to metro.cpp: the VDP generates several types of interrupts, and their timing is not well understood. In the case of metro.cpp, at least one game (puzzlet) is thoroughly broken by this; in the case of sigmab98.cpp, gegege usually fails to boot if the non-VDP interrupts are given what should be more accurate (computed) timings. |
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No.20349
AJR Developer
Jun 30, 2022, 14:30
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I now believe that the KY80 games generate all their interrupts using internal timers. However, they also poll VDP registers for timing purposes, and these remain poorly understood. While experimenting with more probably correct interrupt timings, I noticed lufykzku repeatedly blanking its title screen before redrawing it, which suggests the VDP might well do some form of sprite buffering. |