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alpha68k.cpp: improve dash event timings for Gold Medalist, relaxing gameplay qualification requirements [Angelo Salese]

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angelosa 2019-12-30 02:16:24 +01:00
parent dfc6988fe7
commit ae368dd322
1 changed files with 18 additions and 6 deletions
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24
src/mame/drivers/alpha68k.cpp
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@ -33,6 +33,11 @@ TODO:
- Sky Adventure, probably others: sprite drawing is off-sync, cfr. notes in video file;
- Gold Medalist: attract mode has missing finger on button 1, may be btanb;
- Gold Medalist: incorrect blank effect on shooting pistol for dash events (cfr. alpha68k_palette_device);
- Gold Medalist: dash events timers relies on MCU irq timings.
Previous emulation of 180 Hz was making it way too hard, and the timer was updating at 0.03 secs (-> 30 Hz refresh rate).
Using a timer of 100 Hz seems a better approximation compared to a stopwatch, of course fine tuning
this approximation needs HW probing and/or a MCU decap.
- Gold Medalist: MCU irq routine has an event driven path that is never taken into account, what is it for?
- Super Champion Baseball: enables opacity bit on fix layer, those are transparent on SNK Arcade Classics 0
but actually opaque on a reference shot, sounds like a btanb;
- Fix layer tilemap should be a common device between this, snk68.cpp and other Alpha/SNK-based games;
@ -327,7 +332,11 @@ u16 alpha68k_II_state::alpha_II_trigger_r(offs_t offset)
else
{
if (m_microcontroller_id == 0x8803) /* Gold Medalist */
m_microcontroller_data = 0x21; // timer
{
// TODO: dash events increments timer at 0x16c0 in irq routine (event driven?)
// There's also another unemulated event path if this is 0x5b, unknown purpose
m_microcontroller_data = 0x21;
}
else
m_microcontroller_data = 0x00;
m_shared_ram[0x29] = (source & 0xff00) | m_microcontroller_data;
@ -1310,6 +1319,7 @@ void alpha68k_II_state::btlfieldb(machine_config &config)
{
alpha68k_II(config);
m_maincpu->set_vblank_int("screen", FUNC(alpha68k_II_state::irq1_line_hold));
// TODO: timing
m_maincpu->set_periodic_int(FUNC(alpha68k_II_state::irq2_line_hold), attotime::from_hz(60*4)); // MCU irq
}
@ -1317,7 +1327,8 @@ void goldmedal_II_state::goldmedal(machine_config &config)
{
alpha68k_II(config);
m_maincpu->set_vblank_int("screen", FUNC(goldmedal_II_state::irq1_line_hold));
m_maincpu->set_periodic_int(FUNC(goldmedal_II_state::irq2_line_hold), attotime::from_hz(60*3)); // MCU irq
// TODO: dash events relies on MCU irq timings
m_maincpu->set_periodic_int(FUNC(goldmedal_II_state::irq2_line_hold), attotime::from_hz(100)); // MCU irq
}
void alpha68k_III_state::alpha68k_III(machine_config &config)
@ -1344,7 +1355,8 @@ void alpha68k_III_state::alpha68k_III(machine_config &config)
void goldmedal_III_state::goldmedal(machine_config &config)
{
alpha68k_III_state::alpha68k_III(config);
m_maincpu->set_periodic_int(FUNC(goldmedal_III_state::irq2_line_hold), attotime::from_hz(60*3)); // MCU irq
// TODO: dash events relies on MCU irq timings
m_maincpu->set_periodic_int(FUNC(goldmedal_III_state::irq2_line_hold), attotime::from_hz(100)); // MCU irq
}
void alpha68k_V_state::alpha68k_V(machine_config &config)
@ -2136,11 +2148,11 @@ GAME( 1988, skysoldr, 0, alpha68k_II, skysoldr, alpha68k_II_state, i
GAME( 1988, skysoldrbl,skysoldr, alpha68k_II, skysoldr, alpha68k_II_state, init_skysoldr, ROT90, "bootleg", "Sky Soldiers (bootleg)", MACHINE_SUPPORTS_SAVE )
GAME( 1988, goldmedl, 0, goldmedal, goldmedl, goldmedal_II_state, init_goldmedl, ROT0, "SNK", "Gold Medalist (set 1, Alpha68k II PCB)", MACHINE_SUPPORTS_SAVE )
GAME( 1988, goldmedl, 0, goldmedal, goldmedl, goldmedal_II_state, init_goldmedl, ROT0, "SNK", "Gold Medalist (set 1, Alpha68k II PCB)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_TIMING )
// Alpha III HW
GAME( 1988, goldmedla, goldmedl, goldmedal, goldmedl, goldmedal_III_state, init_goldmedla, ROT0, "SNK", "Gold Medalist (set 2, Alpha68k III PCB)", MACHINE_SUPPORTS_SAVE )
GAME( 1988, goldmedlb, goldmedl, goldmedal, goldmedl, goldmedal_III_state, init_goldmedla, ROT0, "bootleg", "Gold Medalist (bootleg, Alpha68k III PCB)", MACHINE_SUPPORTS_SAVE )
GAME( 1988, goldmedla, goldmedl, goldmedal, goldmedl, goldmedal_III_state, init_goldmedla, ROT0, "SNK", "Gold Medalist (set 2, Alpha68k III PCB)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_TIMING )
GAME( 1988, goldmedlb, goldmedl, goldmedal, goldmedl, goldmedal_III_state, init_goldmedla, ROT0, "bootleg", "Gold Medalist (bootleg, Alpha68k III PCB)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_TIMING )
// Alpha V HW
GAME( 1989, skyadvnt, 0, skyadventure, skyadvnt, skyadventure_state, init_skyadvnt, ROT90, "Alpha Denshi Co.", "Sky Adventure (World)", MACHINE_SUPPORTS_SAVE )