Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-22 08:22:15 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

subsino/lastfght.cpp: add non-instant blitter timings

Browse Source
This commit is contained in:
angelosa 2023-11-20 01:45:55 +01:00
parent d181220b83
commit 0bb5f255a4
1 changed files with 20 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
src/mame/subsino/lastfght.cpp
View File

@ -63,7 +63,7 @@ Notes:
V100.U7 - ST M27C801 8MBit DIP32 EPROM; Audio Samples?
TODO:
- Game speed seems to be completely wrong, timers and player movement too fast?
- blitter timing is guessed, definitely expect non-instant transfers otherwise game is too fast
The EEPROM protection method is the same as in the subsino2.cpp games.
@ -151,6 +151,10 @@ private:
required_device<ds2430a_device> m_eeprom;
required_device<screen_device> m_screen;
required_device<palette_device> m_palette;
bool m_blitter_busy = false;
emu_timer *m_blitter_end_timer = nullptr;
TIMER_CALLBACK_MEMBER(blitter_end_cb);
};
@ -166,6 +170,8 @@ void lastfght_state::video_start()
save_item(NAME(m_bitmap[0]));
save_item(NAME(m_bitmap[1]));
m_blitter_end_timer = timer_alloc(FUNC(lastfght_state::blitter_end_cb), this);
}
@ -348,11 +354,21 @@ void lastfght_state::blit_w(offs_t offset, uint16_t data, uint16_t mem_mask)
dest.pix(m_y + y, m_x + x) = data;
}
}
m_blitter_busy = true;
// num pixels x2 seems to match a reasonable timer countdown during gameplay.
// notice that the other two bits (bit 6 and bit 5 in $c00007) are all
// busy checks, implying multiple stall checks (drawing? vblank?).
m_blitter_end_timer->adjust(m_maincpu->cycles_to_attotime(m_w * m_h * 2));
}
if (ACCESSING_BITS_0_7)
logerror("%06x: 600007.b = %02x\n", m_maincpu->pc(), data);
}
TIMER_CALLBACK_MEMBER(lastfght_state::blitter_end_cb)
{
m_blitter_busy = false;
}
// toggle framebuffer
void lastfght_state::dest_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
@ -364,7 +380,7 @@ uint8_t lastfght_state::c00000_r()
{
// bit 7 = blitter busy
// bit 6 = blitter?
return 0x40;
return 0x40 | m_blitter_busy << 7;
}
uint8_t lastfght_state::c00002_r()
@ -553,6 +569,7 @@ void lastfght_state::lastfght(machine_config &config)
m_screen->set_size(512, 256);
m_screen->set_visarea(0, 512-1, 0, 256-16-1);
m_screen->set_refresh_hz(60);
m_screen->set_vblank_time(ATTOSECONDS_IN_USEC(2500));
m_screen->set_screen_update(FUNC(lastfght_state::screen_update));
m_screen->set_palette(m_palette);
m_screen->screen_vblank().set_inputline(m_maincpu, 0);
@ -591,4 +608,4 @@ void lastfght_state::init_lastfght()
} // Anonymous namespace
GAME( 2000, lastfght, 0, lastfght, lastfght, lastfght_state, init_lastfght, ROT0, "Subsino", "Last Fighting", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )
GAME( 2000, lastfght, 0, lastfght, lastfght, lastfght_state, init_lastfght, ROT0, "Subsino", "Last Fighting", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_IMPERFECT_TIMING | MACHINE_SUPPORTS_SAVE )