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Added a delay to the GDROM DMA transfers, allows KOF Neowave to boot [Angelo Salese]

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This commit is contained in:
Angelo Salese 2010-04-27 18:10:22 +00:00
parent 4c1c2c8517
commit 13b38936ab
1 changed files with 13 additions and 5 deletions
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18
src/mame/machine/dc.c
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@ -191,16 +191,25 @@ static struct {
static TIMER_CALLBACK( aica_dma_irq )
{
wave_dma.start = g2bus_regs[SB_ADST] = 0;
dc_sysctrl_regs[SB_ISTNRM] |= IST_DMA_AICA;
dc_update_interrupt_status(machine);
}
static TIMER_CALLBACK( pvr_dma_irq )
{
pvr_dma.start = pvrctrl_regs[SB_PDST] = 0;
dc_sysctrl_regs[SB_ISTNRM] |= IST_DMA_PVR;
dc_update_interrupt_status(machine);
}
static TIMER_CALLBACK( gdrom_dma_irq )
{
g1bus_regs[SB_GDST]=0;
dc_sysctrl_regs[SB_ISTNRM] |= IST_DMA_GDROM;
dc_update_interrupt_status(machine);
}
static void wave_dma_execute(const address_space *space)
{
UINT32 src,dst,size;
@ -235,7 +244,6 @@ static void wave_dma_execute(const address_space *space)
wave_dma.root_addr = g2bus_regs[SB_ADSTAR] = src;
wave_dma.size = g2bus_regs[SB_ADLEN] = 0;
wave_dma.flag = (wave_dma.indirect & 1) ? 1 : 0;
wave_dma.start = g2bus_regs[SB_ADST] = 0;
/* Note: if you trigger an instant DMA IRQ trigger, sfz3upper doesn't play any bgm. */
/* TODO: timing of this */
timer_set(space->machine, ATTOTIME_IN_USEC(300), NULL, 0, aica_dma_irq);
@ -1289,7 +1297,7 @@ WRITE64_HANDLER( dc_g1_ctrl_w )
{
if (g1bus_regs[SB_GDDIR] == 0)
{
mame_printf_verbose("G1CTRL: unsupported transfer\n");
printf("G1CTRL: unsupported transfer\n");
return;
}
// printf("ROM board DMA to %x len %x (PC %x)\n", g1bus_regs[SB_GDSTAR], g1bus_regs[SB_GDLEN], cpu_get_pc(space->cpu));
@ -1308,9 +1316,9 @@ WRITE64_HANDLER( dc_g1_ctrl_w )
ddtdata.mode= -1; // copy from/to buffer
mame_printf_verbose("G1CTRL: transfer %x from ROM %08x to sdram %08x\n", g1bus_regs[SB_GDLEN], dmaoffset, g1bus_regs[SB_GDSTAR]);
sh4_dma_ddt(devtag_get_device(space->machine, "maincpu"), &ddtdata);
g1bus_regs[SB_GDST]=0;
dc_sysctrl_regs[SB_ISTNRM] |= IST_DMA_GDROM;
dc_update_interrupt_status(space->machine);
/* Note: KOF Neowave definitely wants this to be delayed (!) */
/* FIXME: timing of this */
timer_set(space->machine, ATTOTIME_IN_USEC(500), NULL, 0, gdrom_dma_irq);
}
break;
}