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hh_hmcs40: add note about bultrman bug cause (nw)

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hap 2017-05-12 00:06:30 +02:00
parent c8d0aea11d
commit 78ecf89a06
1 changed files with 5 additions and 3 deletions
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8
src/mame/drivers/hh_hmcs40.cpp
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@ -75,12 +75,14 @@
- gckong random lockups (tap the jump button repeatedly): mcu stack overflow, - gckong random lockups (tap the jump button repeatedly): mcu stack overflow,
works ok if stack levels is increased, 38800 B rev. has more stack levels? works ok if stack levels is increased, 38800 B rev. has more stack levels?
Or it could be a race condition: irq happening too late/early. Or it could be a race condition: irq happening too late/early.
- bultrman building explosions are wrong, especially visible on the first one
- epacman booting the game in demo mode, pacman should go straight to the - epacman booting the game in demo mode, pacman should go straight to the
upper-left power pill: mcu cycle/interrupt timing related upper-left power pill: mcu cycle/interrupt timing related
- Though very uncommon when compared to games with LED/lamp display, - Though very uncommon when compared to games with LED/lamp display, some
some games may manipulate VFD plate brightness by strobing it longer, games may manipulate VFD plate brightness by strobing it longer/shorter,
eg. cgalaxn when the player ship explodes. eg. cgalaxn when the player ship explodes.
- Related to the above issue: bultrman sometimes strobes D0/D1/D2 for a very
short duration, causing (unwanted) dimly lit segments on the real machine.
On MAME they will show with full brightness, see eg. building explosions.
- bzaxxon 3D effect is difficult to simulate - bzaxxon 3D effect is difficult to simulate
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