MIT
This page is designed to allow for a quick look over all the drivers with a MACHINE_IMPERFECT_TIMING flag by giving, as much as possible, an idea on the amount of effort needed to fix them.
alpha68k
goldmedl, goldmedla, goldmedlb - Dash events timers relies on MCU irq timings, which can't be accurate til the MCU is decapped and emulated.
alpha68k_n
sstingry - Super Stingray MCU irq controls timer speed. The MCU has been hooked up but the clock is almost certainly wrong.
aristmk5
Games are running at double speed.
as12
Seems a little bit slower than the real machine. Currently, a dummy timer workaround is needed, or it's much worse. Is the problem here is due to timing of CPU addressbus changes?
clshroad
clshroad and clones - Main and sound CPUs synching isn't perfect.
cobra
cv1k
Games are running faster than on real hardware.
eag68k
feagv10 - V10 CPU emulation is too slow, MAME 68040 opcode timing is same as 68030 but in reality it is much faster, same goes for V11 of course (see below).
feagv11 - V11 CPU should be M68EC060, not yet emulated. Now using M68EC040 in its place at twice the frequency due to lack of superscalar.
elite
fpres/feas irq active time needs verifying.
konamigs
ddrkids - Songs desync.
konamim2
Games are running slower than they should.
mm2
mm4tk, mm5p - They need proper emulation of the TurboKit (it's not as simple as a CPU overclock plus ROM patch).
modular
Waitstates emulation is preliminary.
monon_color
Clock divider unknown.
news_r4k.cpp
psikyo
Excessive input lag.
risc2500
More accurate dynamic cpu clock divider is needed.
sc12
Seems a little bit slower than the real machine. Currently, a dummy timer workaround is needed, or it's much worse. Is the problem here is due to timing of CPU addressbus changes?
spg2xx_shredmjr
Bad music timings (too slow).
taitojc
Games are running at wrong speed(unthrottled?) compared to PCB recordings, easily noticeable on sidebs/sidebs2, for example the selection screens are too fast, and the driving is almost twice as slow.
tasc
More accurate dynamic cpu clock divider is needed.
