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zaccaria.c

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- Remove tms5220 kludge
- hooked up new RS/WS/READY tms5220 interface
- removed dac1 as well. Replaced it by attenuation control for ay2, channel B
This commit is contained in:
Couriersud 2009-09-20 23:37:43 +00:00
parent 12992dad26
commit 387b021a2c
1 changed files with 31 additions and 31 deletions
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62
src/mame/drivers/zaccaria.c
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@ -6,10 +6,9 @@ driver by Nicola Salmoria
thanks to Andrea Babich for the manual.
TODO:
- correctly hook up TMS5200 (there's a kludge in zaccaria_ca2_r to make it work)
- there seems to be a strange kind of DAC connected to 8910 #0 port A, but it sounds
horrible so I'm leaving its volume at 0.
- implement discrete filters for analog signals 1 to 5 and attenuation control
for signal 5 (74LS156)
- The 8910 outputs go through some analog circuitry to make them sound more like
real intruments.
@ -89,17 +88,23 @@ static READ8_HANDLER( zaccaria_dsw_r )
static WRITE8_DEVICE_HANDLER( ay8910_port0a_w )
{
// bits 0-2 go to a weird kind of DAC ??
/* bits 0-2 go to a 74LS156 with open collector outputs
* one out of 8 Resitors is than used to form a resistor
* divider with Analog input 5 (tromba)
*/
// bits 3-4 control the analog drum emulation on 8910 #0 ch. A
if (data & 1) /* DAC enable */
{
/* TODO: is this right? it sound awful */
static const int table[4] = { 0x05, 0x1b, 0x0b, 0x55 };
dac_signed_data_w(devtag_get_device(device->machine, "dac1"),table[(data & 0x06) >> 1]);
}
else
dac_signed_data_w(devtag_get_device(device->machine, "dac1"),0x80);
static const int table[8] = { 8200, 5600, 3300, 1500, 820, 390, 150, 47 };
int b0, b1, b2, ba, v;
b0 = data & 0x01;
b1 = (data & 0x02) >> 1;
b2 = (data & 0x04) >> 2;
ba = (b0<<2) | (b1<<1) | b2;
/* 150 below to scale to volume 100 */
v = (150 * table[ba]) / (4700 + table[ba]);
//printf("dac1w %02d %04d\n", ba, v);
ay8910_set_volume(devtag_get_device(device->machine, "ay2"), 1, v);
}
@ -162,29 +167,30 @@ static INTERRUPT_GEN( zaccaria_cb1_toggle )
static int port1a,port1b;
//static int port1a,port1b;
static READ8_DEVICE_HANDLER( zaccaria_port1a_r )
{
const device_config *tms = devtag_get_device(device->machine, "tms");
if (~port1b & 1) return tms5220_status_r(tms,0);
else return port1a;
return tms5220_status_r(tms,0);
}
static WRITE8_DEVICE_HANDLER( zaccaria_port1a_w )
{
port1a = data;
const device_config *tms = devtag_get_device(device->machine, "tms");
tms5220_data_w(tms,0,data);
}
static WRITE8_DEVICE_HANDLER( zaccaria_port1b_w )
{
const device_config *tms = devtag_get_device(device->machine, "tms");
port1b = data;
// bit 0 = /RS
tms5220_rs_w(tms,0, (data >> 0) & 0x01);
// bit 1 = /WS
if (~data & 2) tms5220_data_w(tms,0,port1a);
tms5220_ws_w(tms,0, (data >> 1) & 0x01);
// bit 3 = "ACS" (goes, inverted, to input port 6 bit 3)
acs = ~data & 0x08;
@ -195,14 +201,7 @@ static WRITE8_DEVICE_HANDLER( zaccaria_port1b_w )
static READ_LINE_DEVICE_HANDLER( zaccaria_ca2_r )
{
// TODO: this doesn't work, why?
// return !tms5220_ready_r();
static int counter;
counter = (counter+1) & 0x0f;
return counter;
return !tms5220_ready_r(device);
}
static void tms5220_irq_handler(const device_config *device, int state)
@ -235,7 +234,7 @@ static const pia6821_interface pia_1_intf =
DEVCB_NULL, /* port B in */
DEVCB_NULL, /* line CA1 in */
DEVCB_NULL, /* line CB1 in */
DEVCB_LINE(zaccaria_ca2_r), /* line CA2 in */
DEVCB_DEVICE_LINE("tms", zaccaria_ca2_r), /* line CA2 in */
DEVCB_NULL, /* line CB2 in */
DEVCB_HANDLER(zaccaria_port1a_w), /* port A out */
DEVCB_HANDLER(zaccaria_port1b_w), /* port B out */
@ -573,13 +572,17 @@ static MACHINE_DRIVER_START( zaccaria )
MDRV_CPU_ADD("maincpu", Z80,XTAL_18_432MHz/6) /* verified on pcb */
MDRV_CPU_PROGRAM_MAP(main_map)
MDRV_CPU_VBLANK_INT("screen", nmi_line_pulse)
MDRV_QUANTUM_TIME(HZ(1000000))
MDRV_CPU_ADD("audiocpu", M6802,XTAL_3_579545MHz) /* verified on pcb */
MDRV_CPU_PROGRAM_MAP(sound_map_1)
MDRV_CPU_PERIODIC_INT(zaccaria_cb1_toggle,(double)3580000/4096)
MDRV_QUANTUM_TIME(HZ(1000000))
MDRV_CPU_ADD("audio2", M6802,XTAL_3_579545MHz) /* verified on pcb */
MDRV_CPU_PROGRAM_MAP(sound_map_2)
MDRV_QUANTUM_TIME(HZ(1000000))
MDRV_PPI8255_ADD( "ppi8255", ppi8255_intf )
MDRV_PIA6821_ADD( "pia0", pia_0_intf )
@ -610,9 +613,6 @@ static MACHINE_DRIVER_START( zaccaria )
MDRV_SOUND_ADD("ay2", AY8910, XTAL_3_579545MHz/2) /* verified on pcb */
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.15)
MDRV_SOUND_ADD("dac1", DAC, 0)
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.0) /* first DAC sounds awful */
MDRV_SOUND_ADD("dac2", DAC, 0)
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)