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enigma2: increase audiocpu interrupt frequency

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hap 2024-11-22 02:09:45 +01:00
parent 366aaf99a9
commit 1b9c531f20
2 changed files with 59 additions and 42 deletions
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3
src/mame/dataeast/chanbara.cpp
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@ -45,6 +45,9 @@ Notes:
------------------------
TODO:
- Verify what happens if you skip an enemy, on MAME the next one may appear out of
thin air. MAME previously showed garbage sprites moving fast to the left and later
changing into an enemy character, disable the (~attr & 0x01) check to see.
- Verify if YM2203 RD is connected. If it is, it waits too long checking the busy flag,
while it already does soft-delays itself. This would cause too slow BGM tempo.

60
src/mame/misc/enigma2.cpp
View File

@ -18,12 +18,12 @@ enigma2b (1981)
Conversion like enigma2a, but boots with 1981 copyright and Phantoms II title
TODO:
- enigma2 - Star blinking frequency
- enigma2 - Sound is incorrectly emulated (see MT07777)
- enigma2a + enigma2b - bad sound ROM?
- enigma2 - Star blinking frequency
- enigma2b - bad sound ROM?
*********************************************************************
Enigma II, Game Plan, 1981
PCB hardware notes by Guru
@ -125,9 +125,11 @@ DIP Switches
*********************************************************************/
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "cpu/z80/z80.h"
#include "sound/ay8910.h"
#include "emupal.h"
#include "screen.h"
#include "speaker.h"
@ -208,6 +210,7 @@ private:
emu_timer *m_interrupt_clear_timer = nullptr;
emu_timer *m_interrupt_assert_timer = nullptr;
emu_timer *m_audio_interrupt_timer = nullptr;
uint8_t dip_switch_r(offs_t offset);
void sound_data_w(uint8_t data);
@ -218,8 +221,9 @@ private:
uint32_t screen_update_enigma2a(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
TIMER_CALLBACK_MEMBER(interrupt_clear_callback);
TIMER_CALLBACK_MEMBER(interrupt_assert_callback);
inline uint16_t vpos_to_vysnc_chain_counter( int vpos );
inline int vysnc_chain_counter_to_vpos( uint16_t counter );
TIMER_CALLBACK_MEMBER(audio_interrupt_callback);
inline uint16_t vpos_to_vysnc_chain_counter(int vpos);
inline int vysnc_chain_counter_to_vpos(uint16_t counter);
void create_interrupt_timers();
void start_interrupt_timers();
@ -236,14 +240,13 @@ private:
*
*************************************/
uint16_t enigma2_state::vpos_to_vysnc_chain_counter( int vpos )
uint16_t enigma2_state::vpos_to_vysnc_chain_counter(int vpos)
{
return vpos + VCOUNTER_START;
}
int enigma2_state::vysnc_chain_counter_to_vpos( uint16_t counter )
int enigma2_state::vysnc_chain_counter_to_vpos(uint16_t counter)
{
return counter - VCOUNTER_START;
}
@ -278,17 +281,27 @@ TIMER_CALLBACK_MEMBER(enigma2_state::interrupt_assert_callback)
}
void enigma2_state::create_interrupt_timers( )
TIMER_CALLBACK_MEMBER(enigma2_state::audio_interrupt_callback)
{
m_interrupt_clear_timer = timer_alloc(FUNC(enigma2_state::interrupt_clear_callback), this);
m_interrupt_assert_timer = timer_alloc(FUNC(enigma2_state::interrupt_assert_callback), this);
m_audiocpu->set_input_line(0, HOLD_LINE);
int next_vpos = m_screen->vpos() + 16;
m_audio_interrupt_timer->adjust(m_screen->time_until_pos(next_vpos > VTOTAL ? 8 : next_vpos));
}
void enigma2_state::start_interrupt_timers( )
void enigma2_state::create_interrupt_timers()
{
m_interrupt_clear_timer = timer_alloc(FUNC(enigma2_state::interrupt_clear_callback), this);
m_interrupt_assert_timer = timer_alloc(FUNC(enigma2_state::interrupt_assert_callback), this);
m_audio_interrupt_timer = timer_alloc(FUNC(enigma2_state::audio_interrupt_callback), this);
}
void enigma2_state::start_interrupt_timers()
{
int vpos = vysnc_chain_counter_to_vpos(INT_TRIGGER_COUNT_1);
m_interrupt_assert_timer->adjust(m_screen->time_until_pos(vpos));
m_audio_interrupt_timer->adjust(m_screen->time_until_pos(8));
}
@ -384,8 +397,10 @@ uint32_t enigma2_state::screen_update_enigma2(screen_device &screen, bitmap_rgb3
if (bit)
color = fore_color;
else
{
/* stars only appear at certain positions */
color = ((x & y & 0x0f) == 0x0f) ? star_color : 0;
}
bitmap.pix(bitmap_y, x) = m_palette->pen_color(color);
@ -489,10 +504,7 @@ uint8_t enigma2_state::dip_switch_r(offs_t offset)
break;
case 0x02:
if (m_maincpu->pc() == 0x07e5)
ret = 0xaa;
else
ret = 0xf4;
ret = m_protection_data & ~0x01;
break;
case 0x35: ret = 0x38; break;
@ -508,7 +520,7 @@ void enigma2_state::sound_data_w(uint8_t data)
{
/* clock sound latch shift register on rising edge of D2 */
if (!(data & 0x04) && (m_last_sound_data & 0x04))
m_sound_latch = (m_sound_latch << 1) | (~data & 0x01);
m_sound_latch = (m_sound_latch >> 1) | (~data << 7 & 0x80);
m_audiocpu->set_input_line(INPUT_LINE_NMI, (data & 0x02) ? ASSERT_LINE : CLEAR_LINE);
@ -518,7 +530,7 @@ void enigma2_state::sound_data_w(uint8_t data)
uint8_t enigma2_state::sound_latch_r()
{
return bitswap<8>(m_sound_latch,0,1,2,3,4,5,6,7);
return m_sound_latch;
}
@ -716,9 +728,10 @@ void enigma2_state::enigma2(machine_config &config)
Z80(config, m_maincpu, CPU_CLOCK);
m_maincpu->set_addrmap(AS_PROGRAM, &enigma2_state::enigma2_main_cpu_map);
Z80(config, m_audiocpu, 2500000);
Z80(config, m_audiocpu, CPU_CLOCK);
m_audiocpu->set_addrmap(AS_PROGRAM, &enigma2_state::enigma2_audio_cpu_map);
m_audiocpu->set_periodic_int(FUNC(enigma2_state::irq0_line_hold), attotime::from_hz(8*52));
config.set_maximum_quantum(attotime::from_hz(m_maincpu->clock() / 4));
/* video hardware */
SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
@ -744,9 +757,10 @@ void enigma2_state::enigma2a(machine_config &config)
m_maincpu->set_addrmap(AS_PROGRAM, &enigma2_state::enigma2a_main_cpu_map);
m_maincpu->set_addrmap(AS_IO, &enigma2_state::enigma2a_main_cpu_io_map);
Z80(config, m_audiocpu, 2500000);
Z80(config, m_audiocpu, CPU_CLOCK);
m_audiocpu->set_addrmap(AS_PROGRAM, &enigma2_state::enigma2_audio_cpu_map);
m_audiocpu->set_periodic_int(FUNC(enigma2_state::irq0_line_hold), attotime::from_hz(8*52));
config.set_maximum_quantum(attotime::from_hz(m_maincpu->clock() / 4));
/* video hardware */
SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
@ -794,7 +808,7 @@ ROM_START( enigma2a )
ROM_LOAD( "6.13d", 0x4800, 0x0800, CRC(240a9d4b) SHA1(ca1c69fafec0471141ce1254ddfaef54fecfcbf0) )
ROM_REGION( 0x10000, "audiocpu", 0 )
ROM_LOAD( "sound.bin", 0x0000, 0x0800, BAD_DUMP CRC(5f092d3c) SHA1(17c70f6af1b5560a45e6b1bdb330a98b27570fe9) )
ROM_LOAD( "sound.bin", 0x0000, 0x0800, CRC(5f092d3c) SHA1(17c70f6af1b5560a45e6b1bdb330a98b27570fe9) )
ROM_END
ROM_START( enigma2b )