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ssriders.cpp: protection chip actually uses the work RAM buffer for horizontal scrolling in collision dtection routine. Fixed players/enemies collision detection on slopes. [Angelo Salese]

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angelosa 2016-09-17 02:28:13 +02:00
parent 026487927f
commit a7c6b6df1c
1 changed files with 3 additions and 4 deletions
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7
src/mame/drivers/tmnt.cpp
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@ -43,8 +43,7 @@ Updates:
correctly. TMNT2 stays dimmed most of the time.(fixed)
- sprite lag, quite evident in lgtnfght and mia but also in the others.
Also see the left corner of the wall in punkshot DownTown level(should be better)
- ssriders: Billy no longer goes berserk at stage 4's boss. Players
don't jitter as much walking on slanted surfaces.
- ssriders: Billy no longer goes berserk at stage 4's boss.
* uncertain bugs:
- Detana!! Twin Bee's remaining sprite lag does not appear to be
@ -320,8 +319,8 @@ READ16_MEMBER(tmnt_state::ssriders_protection_r)
/* collision table */
data = -space.read_word(0x105818);
data = ((data / 8 - 4) & 0x1f) * 0x40;
data += ((space.read_word(0x105cb0) +
256 * m_k052109->read(space, 0x1a01) + m_k052109->read(space, 0x1a00) - 6) / 8 + 12) & 0x3f;
// 0x1040c8 is the x scroll buffer, avoids stutter on slopes + scrolling (and it's actually more logical as HW pov)
data += ((space.read_word(0x105cb0) + space.read_word(0x1040c8) - 6) / 8 + 12) & 0x3f;
return data;
default: