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mirror of https://github.com/holub/mame synced 2025-05-22 21:58:57 +03:00
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OG's fixes:

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* proper interrupt handling
 * fixed dcclub magic latch
This commit is contained in:
Aaron Giles 2008-10-05 16:09:46 +00:00
parent dfa4d1a50f
commit fabff71d78
1 changed files with 60 additions and 72 deletions
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132
src/mame/drivers/segas24.c
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@ -762,11 +762,11 @@ static WRITE16_HANDLER( ym_data_w )
static const UINT8 mahmajn_mlt[8] = { 5, 1, 6, 2, 3, 7, 4, 0 };
static const UINT8 mahmajn2_mlt[8] = { 6, 0, 5, 3, 1, 4, 2, 7 };
static const UINT8 gqh_mlt[8] = { 3, 7, 4, 0, 2, 6, 5, 1 };
static const UINT8 qgh_mlt[8] = { 3, 7, 4, 0, 2, 6, 5, 1 };
static const UINT8 bnzabros_mlt[8] = { 2, 4, 0, 5, 7, 3, 1, 6 };
static const UINT8 qrouka_mlt[8] = { 1, 6, 4, 7, 0, 5, 3, 2 };
static const UINT8 quizmeku_mlt[8] = { 0, 3, 2, 4, 6, 1, 7, 5 };
static const UINT8 dcclub_mlt[8] = { 4, 3, 7, 0, 2, 6, 1, 5 };
static const UINT8 dcclub_mlt[8] = { 4, 7, 3, 0, 2, 6, 5, 1 };
static UINT8 mlatch;
static const UINT8 *mlatch_table;
@ -814,8 +814,8 @@ enum {
static UINT16 irq_timera;
static UINT8 irq_timerb;
static UINT8 irq_allow0, irq_allow1;
static int irq_timer_pend0, irq_timer_pend1, irq_yms;
static emu_timer *irq_timer;
static int irq_timer_pend0, irq_timer_pend1, irq_yms, irq_vblank, irq_sprite;
static emu_timer *irq_timer, *irq_timer_clear;
static TIMER_CALLBACK( irq_timer_cb )
{
@ -826,6 +826,15 @@ static TIMER_CALLBACK( irq_timer_cb )
cpunum_set_input_line(machine, 1, IRQ_TIMER+1, ASSERT_LINE);
}
static TIMER_CALLBACK( irq_timer_clear_cb )
{
irq_sprite = irq_vblank = 0;
cpunum_set_input_line(machine, 0, IRQ_VBLANK+1, CLEAR_LINE);
cpunum_set_input_line(machine, 0, IRQ_SPRITE+1, CLEAR_LINE);
cpunum_set_input_line(machine, 1, IRQ_VBLANK+1, CLEAR_LINE);
cpunum_set_input_line(machine, 1, IRQ_SPRITE+1, CLEAR_LINE);
}
static void irq_init(void)
{
irq_timera = 0;
@ -834,7 +843,10 @@ static void irq_init(void)
irq_allow1 = 0;
irq_timer_pend0 = 0;
irq_timer_pend1 = 0;
irq_vblank = 0;
irq_sprite = 0;
irq_timer = timer_alloc(irq_timer_cb, NULL);
irq_timer_clear = timer_alloc(irq_timer_clear_cb, NULL);
}
static void irq_timer_reset(void)
@ -866,81 +878,46 @@ static WRITE16_HANDLER(irq_w)
break;
case 2:
irq_allow0 = data;
cpunum_set_input_line(machine, 0, IRQ_TIMER+1, irq_timer_pend0 && (irq_allow0 & (1 << IRQ_TIMER)) ? ASSERT_LINE : CLEAR_LINE);
irq_timer_pend0 = 0;
cpunum_set_input_line(machine, 0, IRQ_TIMER+1, CLEAR_LINE);
cpunum_set_input_line(machine, 0, IRQ_YM2151+1, irq_yms && (irq_allow0 & (1 << IRQ_YM2151)) ? ASSERT_LINE : CLEAR_LINE);
cpunum_set_input_line(machine, 0, IRQ_VBLANK+1, irq_vblank && (irq_allow0 & (1 << IRQ_VBLANK)) ? ASSERT_LINE : CLEAR_LINE);
cpunum_set_input_line(machine, 0, IRQ_SPRITE+1, irq_sprite && (irq_allow0 & (1 << IRQ_SPRITE)) ? ASSERT_LINE : CLEAR_LINE);
break;
case 3:
irq_allow1 = data;
cpunum_set_input_line(machine, 1, IRQ_TIMER+1, irq_timer_pend1 && (irq_allow1 & (1 << IRQ_TIMER)) ? ASSERT_LINE : CLEAR_LINE);
irq_timer_pend1 = 0;
cpunum_set_input_line(machine, 1, IRQ_TIMER+1, CLEAR_LINE);
cpunum_set_input_line(machine, 1, IRQ_YM2151+1, irq_yms && (irq_allow1 & (1 << IRQ_YM2151)) ? ASSERT_LINE : CLEAR_LINE);
cpunum_set_input_line(machine, 1, IRQ_VBLANK+1, irq_vblank && (irq_allow1 & (1 << IRQ_VBLANK)) ? ASSERT_LINE : CLEAR_LINE);
cpunum_set_input_line(machine, 1, IRQ_SPRITE+1, irq_sprite && (irq_allow1 & (1 << IRQ_SPRITE)) ? ASSERT_LINE : CLEAR_LINE);
break;
}
}
static int ggground_kludge;
/* This IRQ needs to be generated before the others or the GFX
don't get uploaded correctly and you see nothing */
static TIMER_CALLBACK( gground_generate_kludge_irq )
{
cpunum_set_input_line(machine, 1, 5, HOLD_LINE);
}
static READ16_HANDLER(irq_r)
{
/* These hacks are for Gain Ground */
/* otherwise the interrupt occurs before the correct state has been
set and the game crashes before booting */
if (!strcmp(machine->gamedrv->name,"gground"))
{
if (activecpu_get_pc()==0x0084aa)
{
ggground_kludge = 1;
return mame_rand(machine);
}
if (activecpu_get_pc()==0x084ba)
{
/* Clear IRQ line so IRQ doesn't happen too early */
cpunum_set_input_line(machine, 1, 5, CLEAR_LINE);
/* set a timer to generate an irq at the needed point */
if (ggground_kludge == 1)
{
timer_set(ATTOTIME_IN_USEC(180000), NULL, 0, gground_generate_kludge_irq);
ggground_kludge = 0;
}
return 1;
}
}
if (!strcmp(machine->gamedrv->name,"ggroundj"))
{
if (activecpu_get_pc()==0x0084ac)
{
ggground_kludge = 1;
return mame_rand(machine);
}
if (activecpu_get_pc()==0x084bc)
{
/* Clear IRQ line so IRQ doesn't happen too early */
cpunum_set_input_line(machine, 1, 5, CLEAR_LINE);
/* set a timer to generate an irq at the needed point */
if (ggground_kludge == 1)
{
timer_set(ATTOTIME_IN_USEC(180000), NULL, 0, gground_generate_kludge_irq);
ggground_kludge = 0;
}
return 1;
}
}
extern int activecpu;
switch(offset) {
case 0: {
int pc = activecpu_get_pc();
static int turns;
if(pc == 0x84a4 || pc == 0x84a6)
return 0;
if(pc == 0x84aa || pc == 0x84ac) {
// limit = 0x1b5f
turns = 0x0100;
return 1;
}
if(pc == 0x84ba || pc == 0x84bc) {
// 26 cycles/read
turns--;
return turns ? 1 : 0x200;
}
// 84c8
// -> 85ac / 85bc?
break;
}
case 2:
irq_timer_pend0 = 0;
cpunum_set_input_line(machine, 0, IRQ_TIMER+1, CLEAR_LINE);
@ -955,14 +932,25 @@ static READ16_HANDLER(irq_r)
static INTERRUPT_GEN(irq_vbl)
{
int irq = cpu_getiloops() ? IRQ_SPRITE : IRQ_VBLANK;
int mask = 1 << irq;
int irq, mask;
if(cpu_getiloops()) {
irq = IRQ_SPRITE;
irq_sprite = 1;
} else {
irq = IRQ_VBLANK;
irq_vblank = 1;
}
timer_adjust_oneshot(irq_timer_clear, ATTOTIME_IN_HZ(VIDEO_CLOCK/2/656.0), 0);
mask = 1 << irq;
if(irq_allow0 & mask)
cpunum_set_input_line(machine, 0, 1+irq, HOLD_LINE);
cpunum_set_input_line(machine, 0, 1+irq, ASSERT_LINE);
if(irq_allow1 & mask)
cpunum_set_input_line(machine, 1, 1+irq, HOLD_LINE);
cpunum_set_input_line(machine, 1, 1+irq, ASSERT_LINE);
if(!cpu_getiloops()) {
// Ensure one index pulse every 20 frames
@ -2152,7 +2140,7 @@ ROM_END
static DRIVER_INIT( qgh )
{
system24temp_sys16_io_set_callbacks(hotrod_io_r, hotrod_io_w, resetcontrol_w, iod_r, iod_w);
mlatch_table = gqh_mlt;
mlatch_table = qgh_mlt;
track_size = 0;
}