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system1: do cycle adjust with modulo instead of float,

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cking_master: move init function
This commit is contained in:
hap 2023-08-30 19:52:07 +02:00
parent bbaa41135f
commit f6ff2217e1
4 changed files with 41 additions and 32 deletions
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38
src/mame/chess/cking_master.cpp
View File

@ -74,6 +74,28 @@ private:
u16 m_inp_mux = 0;
};
/*******************************************************************************
Initialization
*******************************************************************************/
void master_state::init_master()
{
u8 *rom = memregion("maincpu")->base();
const u32 len = memregion("maincpu")->bytes();
// descramble data lines
for (int i = 0; i < len; i++)
rom[i] = bitswap<8>(rom[i], 4,5,0,7,6,1,3,2);
// descramble address lines
std::vector<u8> buf(len);
memcpy(&buf[0], rom, len);
for (int i = 0; i < len; i++)
rom[i] = buf[bitswap<16>(i, 15,14,13,12,11,3,7,9, 10,8,6,5,4,2,1,0)];
}
void master_state::machine_start()
{
// register for savestates
@ -116,22 +138,6 @@ u8 master_state::input_r()
return ~data;
}
void master_state::init_master()
{
u8 *rom = memregion("maincpu")->base();
const u32 len = memregion("maincpu")->bytes();
// descramble data lines
for (int i = 0; i < len; i++)
rom[i] = bitswap<8>(rom[i], 4,5,0,7,6,1,3,2);
// descramble address lines
std::vector<u8> buf(len);
memcpy(&buf[0], rom, len);
for (int i = 0; i < len; i++)
rom[i] = buf[bitswap<16>(i, 15,14,13,12,11,3,7,9, 10,8,6,5,4,2,1,0)];
}
/*******************************************************************************

6
src/mame/chess/compuchess.cpp
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@ -180,6 +180,12 @@ private:
bool m_blink = false;
};
/*******************************************************************************
Initialization
*******************************************************************************/
void cmpchess_state::machine_start()
{
// register for savestates

25
src/mame/sega/system1.cpp
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@ -340,7 +340,7 @@ void system1_state::machine_start()
}
save_item(NAME(m_dakkochn_mux_data));
save_item(NAME(m_cycle_adjust));
save_item(NAME(m_adjust_cycles));
save_item(NAME(m_videomode_prev));
save_item(NAME(m_mcu_control));
save_item(NAME(m_nob_maincpu_latch));
@ -375,18 +375,15 @@ void system1_state::machine_reset()
is 10, which means the 20MHz clock is divided by 6. When /M1 is high, the reload
count is 11, which means the clock is divided by 5.
Since /M1 is low for 2 cycles during opcode fetch, this makes every opcode fetch
take an extra 2 20MHz clocks, which is 0.4 cycles at 4MHz.
Since /M1 is low for 2 cycles during opcode fetch, this makes every opcode fetch
take an extra 2 20MHz clocks, which is 2/5th cycles at 4MHz.
*/
void system1_state::refresh_cb(u8 data)
void system1_state::adjust_cycles(u8 data)
{
m_cycle_adjust += 0.4;
if (m_cycle_adjust >= 1.0)
{
m_cycle_adjust -= 1.0;
m_adjust_cycles = (m_adjust_cycles + 2) % 5;
if (m_adjust_cycles <= 1)
m_maincpu->adjust_icount(-1);
}
}
@ -2174,7 +2171,7 @@ void system1_state::sys1ppi(machine_config &config)
m_maincpu->set_addrmap(AS_PROGRAM, &system1_state::system1_map);
m_maincpu->set_addrmap(AS_IO, &system1_state::system1_ppi_io_map);
m_maincpu->set_vblank_int("screen", FUNC(system1_state::irq0_line_hold));
m_maincpu->refresh_cb().set(FUNC(system1_state::refresh_cb));
m_maincpu->refresh_cb().set(FUNC(system1_state::adjust_cycles));
Z80(config, m_soundcpu, SOUND_CLOCK/2);
m_soundcpu->set_addrmap(AS_PROGRAM, &system1_state::sound_map);
@ -2193,7 +2190,7 @@ void system1_state::sys1ppi(machine_config &config)
/* video hardware */
SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
m_screen->set_video_attributes(VIDEO_ALWAYS_UPDATE); /* needed for proper hardware collisions */
m_screen->set_video_attributes(VIDEO_ALWAYS_UPDATE); /* needed for proper hardware collisions */
m_screen->set_raw(MASTER_CLOCK/2, 640, 0, 512, 260, 0, 224);
m_screen->set_screen_update(FUNC(system1_state::screen_update_system1));
m_screen->set_palette(m_palette);
@ -2242,7 +2239,7 @@ void system1_state::encrypted_sys1ppi_maps(machine_config &config)
m_maincpu->set_addrmap(AS_OPCODES, &system1_state::decrypted_opcodes_map);
m_maincpu->set_addrmap(AS_IO, &system1_state::system1_ppi_io_map);
m_maincpu->set_vblank_int("screen", FUNC(system1_state::irq0_line_hold));
m_maincpu->refresh_cb().set(FUNC(system1_state::refresh_cb));
m_maincpu->refresh_cb().set(FUNC(system1_state::adjust_cycles));
}
void system1_state::encrypted_sys1pio_maps(machine_config &config)
@ -2251,7 +2248,7 @@ void system1_state::encrypted_sys1pio_maps(machine_config &config)
m_maincpu->set_addrmap(AS_OPCODES, &system1_state::decrypted_opcodes_map);
m_maincpu->set_addrmap(AS_IO, &system1_state::system1_pio_io_map);
m_maincpu->set_vblank_int("screen", FUNC(system1_state::irq0_line_hold));
m_maincpu->refresh_cb().set(FUNC(system1_state::refresh_cb));
m_maincpu->refresh_cb().set(FUNC(system1_state::adjust_cycles));
}
void system1_state::encrypted_sys2_mc8123_maps(machine_config &config)
@ -2260,7 +2257,7 @@ void system1_state::encrypted_sys2_mc8123_maps(machine_config &config)
m_maincpu->set_addrmap(AS_OPCODES, &system1_state::banked_decrypted_opcodes_map);
m_maincpu->set_addrmap(AS_IO, &system1_state::system1_ppi_io_map);
m_maincpu->set_vblank_int("screen", FUNC(system1_state::irq0_line_hold));
m_maincpu->refresh_cb().set(FUNC(system1_state::refresh_cb));
m_maincpu->refresh_cb().set(FUNC(system1_state::adjust_cycles));
}
void system1_state::sys1pioxb(machine_config &config)

4
src/mame/sega/system1.h
View File

@ -137,7 +137,7 @@ private:
u8 m_tilemap_pages = 0;
// protection, miscs
float m_cycle_adjust = 0.0;
u8 m_adjust_cycles = 0;
u8 m_mute_xor = 0;
u8 m_dakkochn_mux_data = 0;
u8 m_mcu_control = 0;
@ -166,7 +166,7 @@ private:
void sound_control_w(u8 data);
// misc handlers
void refresh_cb(u8 data);
void adjust_cycles(u8 data);
void mcu_control_w(u8 data);
u8 mcu_io_r(offs_t offset);
void mcu_io_w(offs_t offset, u8 data);