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SCSP: Made a more sane Sound->Main IRQ behaviour

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This commit is contained in:
Angelo Salese 2013-01-22 05:19:57 +00:00
parent 9896580053
commit 60be7f289e
1 changed files with 48 additions and 7 deletions
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55
src/emu/sound/scsp.c
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@ -222,6 +222,9 @@ struct scsp_state
UINT16 dma_regs[3];
UINT16 mcieb;
UINT16 mcipd;
int ARTABLE[64], DRTABLE[64];
SCSPDSP DSP;
@ -309,6 +312,14 @@ static void CheckPendingIRQ(scsp_state *scsp)
scsp->Int68kCB(scsp->device, 0);
}
static void MainCheckPendingIRQ(scsp_state *scsp, UINT16 irq_type)
{
scsp->mcipd |= irq_type;
if(scsp->mcipd & scsp->mcieb)
scsp->main_irq(1);
}
static void ResetInterrupts(scsp_state *scsp)
{
UINT32 reset = scsp->udata.data[0x22/2];
@ -789,6 +800,14 @@ static void SCSP_UpdateReg(scsp_state *scsp, address_space &space, int reg)
}
}
break;
case 0x1e:
case 0x1f:
if(scsp->Master)
{
if(scsp->udata.data[0x1e/2] & 0x630)
popmessage("SCSP SCIEB enabled %04x, contact MAMEdev",scsp->udata.data[0x1e/2]);
}
break;
case 0x22: //SCIRE
case 0x23:
@ -826,6 +845,25 @@ static void SCSP_UpdateReg(scsp_state *scsp, address_space &space, int reg)
scsp->IrqMidi=DecodeSCI(scsp,SCIMID);
}
break;
case 0x2a:
case 0x2b:
scsp->mcieb = scsp->udata.data[0x2a/2];
MainCheckPendingIRQ(scsp, 0);
if(scsp->mcieb & ~0x20)
popmessage("SCSP MCIEB enabled %04x, contact MAMEdev",scsp->mcieb);
break;
case 0x2c:
case 0x2d:
if(scsp->udata.data[0x2c/2] & 0x20)
MainCheckPendingIRQ(scsp, 0x20);
break;
case 0x2e:
case 0x2f:
scsp->mcipd &= ~scsp->udata.data[0x2e/2];
MainCheckPendingIRQ(scsp, 0);
break;
}
}
@ -878,6 +916,16 @@ static void SCSP_UpdateRegR(scsp_state *scsp, address_space &space, int reg)
case 0x1c:
case 0x1d:
break;
case 0x2a:
case 0x2b:
scsp->udata.data[0x2a/2] = scsp->mcieb;
break;
case 0x2c:
case 0x2d:
scsp->udata.data[0x2c/2] = scsp->mcipd;
break;
}
}
@ -1322,13 +1370,6 @@ WRITE16_DEVICE_HANDLER( scsp_w )
if(ACCESSING_BITS_8_15 && offset*2 == 0x416)
dma_scsp(space, scsp);
break;
case 0x42a: //check main cpu IRQ
scsp->main_irq(1);
break;
case 0x42c:
break;
case 0x42e:
break;
}
}