|Viewing Issue Advanced Details||megasys1.cpp|
|ID||Category [?]||Severity [?]||Reproducibility||Date Submitted||Last Update|
|02640||Gameplay||Major||Have not tried||Nov 10, 2008, 02:13||Jan 4, 2016, 21:45|
|Tester||Tafoid||View Status||Public||Platform||MAME (Official Binary)|
|Assigned To||Kale||Resolution||Fixed||OS||Windows 2000|
|Version||0.128u3||Fixed in Version||0.170||Build||Normal|
|Summary||02640: kazan, iganinju: Multiple issues (slow graphic rendering, missing graphics)|
From 0.127u1 - there was some change (I suspect 68000 core related) which caused the speed of the action in the game to slow to at least 1/5th the speed of normal gameplay (use 0.127 to compare). MAME 0.127u6 introduced another issue, which renders the game completely unplayable due to lack of displayed graphics (you cannot see anything but a yellow screen.) Throughout all the issues, the sound is played at normal speed as well as inputs working as expected.
|Steps To Reproduce|
|Regression Version||0.127u1, 0.127u6|
|Affected Sets / Systems||kazan, iganinju|
Nov 11, 2008, 06:07
|Patching out from the interrupts routine the level3 IRQ makes the graphics appear again. The game remains very very slow though so my guess is that kazan need its own interrupt routine that is probably different from the other games.|
Nov 11, 2008, 12:44
more likely the interrupts just need fixing in the driver, just look at all the other problems (terrible sprite lag in avenging spirit for example)
I guess it's possible the protection device is involved, but, yeah, interrupts in the driver are a mess, and the sources aren't known.
Jun 29, 2011, 07:48
|Should be marked as non working?|
Jul 2, 2011, 17:13
No, it was somehow working before.
I'm planning into rewriting the whole irq stuff for the driver, and try to understand how the protection basically works in it rather than just do patches.