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Added basic ADPCM support to Grand Cross [Angelo Salese]

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Angelo Salese 2009-05-14 20:46:22 +00:00
parent aa7b8f9323
commit 728b617f74
1 changed files with 54 additions and 23 deletions
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77
src/mame/drivers/gcpinbal.c
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@ -38,7 +38,8 @@ Stephh's notes (based on the game M68000 code and some tests) :
/* M6585 */
static int start, end, bank;
static UINT32 msm_start, msm_end, msm_bank;
static UINT32 adpcm_start, adpcm_end, adpcm_idle;
/***********************************************************
INTERRUPTS
@ -119,7 +120,7 @@ static WRITE16_HANDLER( ioc_w )
switch (offset)
{
// these are all written every frame
/*case 0x3b:
case 0x3b:
case 0xa:
case 0xc:
case 0xb:
@ -127,21 +128,17 @@ static WRITE16_HANDLER( ioc_w )
case 0xe:
case 0xf:
case 0x10:
break;
case 0x47:
popmessage("%04x",data);
break;*/
break;
// MSM6585 bank, coin LEDs, maybe others?
case 0x44:
if (data & 0x10) // Check this, this looks a 8-bit port so it must be bit 12, not 4 -AS
bank = 0x100000;
else
bank = 0;
msm_bank = data & 0x1000 ? 0x100000 : 0;
okim6295_set_bank_base(devtag_get_device(space->machine, "oki"), 0x40000 * ((data & 0x800)>>11));
break;
case 0x45:
//adpcm_idle = 1;
break;
// OKIM6295
@ -152,32 +149,38 @@ static WRITE16_HANDLER( ioc_w )
// MSM6585 ADPCM - mini emulation
case 0x60:
start &= 0xffff00;
start |= (data>>8);
msm_start &= 0xffff00;
msm_start |= (data>>8);
break;
case 0x61:
start &= 0xff00ff;
start |= data;
msm_start &= 0xff00ff;
msm_start |= data;
break;
case 0x62:
start &= 0x00ffff;
start |= (data<<8);
msm_start &= 0x00ffff;
msm_start |= (data<<8);
break;
case 0x63:
end &= 0xffff00;
end |= (data>>8);
msm_end &= 0xffff00;
msm_end |= (data>>8);
break;
case 0x64:
end &= 0xff00ff;
end |= data;
msm_end &= 0xff00ff;
msm_end |= data;
break;
case 0x65:
end &= 0x00ffff;
end |= (data<<8);
msm_end &= 0x00ffff;
msm_end |= (data<<8);
break;
case 0x66:
if (start < end)
if (msm_start < msm_end)
{
/* data written here is adpcm param? */
//popmessage("%08x %08x",msm_start+msm_bank,msm_end);
adpcm_idle = 0;
msm5205_reset_w(devtag_get_device(space->machine, "msm"),0);
adpcm_start = msm_start+msm_bank;
adpcm_end = msm_end;
// ADPCM_stop(0);
// ADPCM_play(0, start+bank, end-start);
}
@ -197,7 +200,28 @@ static WRITE16_HANDLER( ioc_w )
/* Controlled through ioc? */
static void gcp_adpcm_int(const device_config *device)
{
static UINT8 trigger,adpcm_data;
if (adpcm_idle)
msm5205_reset_w(device,1);
if (adpcm_start >= 0x200000 || adpcm_start > adpcm_end)
{
//msm5205_reset_w(device,1);
adpcm_start = msm_start+msm_bank;
trigger = 0;
}
else
{
UINT8 *ROM = memory_region(device->machine, "msm");
adpcm_data = ((trigger ? (ROM[adpcm_start] & 0x0f) : (ROM[adpcm_start] & 0xf0)>>4) );
msm5205_data_w(device,adpcm_data & 0xf);
trigger^=1;
if(trigger == 0) { adpcm_start++; }
}
}
/***********************************************************
@ -357,10 +381,15 @@ GFXDECODE_END
static const msm5205_interface msm5205_config =
{
NULL, /* VCK function */
gcp_adpcm_int, /* VCK function */
MSM5205_S48_4B /* 8 kHz */
};
static MACHINE_RESET( gcpinbal )
{
adpcm_idle = 1;
}
/***********************************************************
MACHINE DRIVERS
***********************************************************/
@ -383,6 +412,8 @@ static MACHINE_DRIVER_START( gcpinbal )
MDRV_GFXDECODE(gcpinbal)
MDRV_PALETTE_LENGTH(4096)
MDRV_MACHINE_RESET(gcpinbal)
MDRV_VIDEO_START(gcpinbal)
MDRV_VIDEO_UPDATE(gcpinbal)