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ironhors: add discrete filtering and mixing

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* one driver less using FILTER_RC
This commit is contained in:
Couriersud 2008-04-02 22:00:10 +00:00
parent 5bc94c30dd
commit 622bbf8e6a
1 changed files with 58 additions and 17 deletions
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75
src/mame/drivers/ironhors.c
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@ -10,8 +10,7 @@ driver by Mirko Buffoni
#include "deprecat.h"
#include "cpu/m6809/m6809.h"
#include "sound/2203intf.h"
#include "sound/flt_rc.h"
#include "sound/discrete.h"
extern UINT8 *ironhors_scroll;
static UINT8 *ironhors_interrupt_enable;
@ -48,15 +47,14 @@ static WRITE8_HANDLER( ironhors_sh_irqtrigger_w )
static WRITE8_HANDLER( ironhors_filter_w )
{
if (sndti_exists(SOUND_FILTER_RC, 2))
if (sndti_exists(SOUND_DISCRETE, 2))
{
filter_rc_set_RC(0,FLT_RC_LOWPASS, 1000,2200,1000,data & 0x04 ? CAP_N(220) : 0); /* YM2203-SSG-A */
filter_rc_set_RC(1,FLT_RC_LOWPASS, 1000,2200,1000,data & 0x02 ? CAP_N(220) : 0); /* YM2203-SSG-B */
filter_rc_set_RC(2,FLT_RC_LOWPASS, 1000,2200,1000,data & 0x01 ? CAP_N(220) : 0); /* YM2203-SSG-C */
discrete_sound_w(machine, NODE_11, (data & 0x04) >> 2);
discrete_sound_w(machine, NODE_12, (data & 0x02) >> 1);
discrete_sound_w(machine, NODE_13, (data & 0x01) >> 0);
}
}
static ADDRESS_MAP_START( master_map, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x0000, 0x0002) AM_RAM
AM_RANGE(0x0003, 0x0003) AM_RAM AM_WRITE(ironhors_charbank_w)
@ -382,6 +380,50 @@ static GFXDECODE_START( farwest )
GFXDECODE_ENTRY( REGION_GFX2, 0, farwest_spritelayout2,16*8*16, 16*8 ) /* to handle 8x8 sprites */
GFXDECODE_END
static const discrete_mixer_desc ironhors_mixer_desc =
{DISC_MIXER_IS_RESISTOR,
{RES_K(2.2), RES_K(2.2), RES_K(2.2)},
{0,0,0,0,0,0}, /* no variable resistors */
{0,0,0,0,0,0}, /* no node capacitors */
0, RES_K(1), /* RF */
0,
0,
0, 1};
static const discrete_mixer_desc ironhors_mixer_desc_final =
{DISC_MIXER_IS_RESISTOR,
{RES_K(0.5), RES_K(1)},
{0,0,0,0,0,0}, /* no variable resistors */
{CAP_U(4.7), CAP_U(4.7)}, /* node capacitors */
0, RES_K(1), /* RF */
0,
0,
0, 1};
static DISCRETE_SOUND_START( ironhors )
DISCRETE_INPUTX_STREAM(NODE_01, 0, 1.0, 0)
DISCRETE_INPUTX_STREAM(NODE_02, 1, 1.0, 0)
DISCRETE_INPUTX_STREAM(NODE_03, 2, 1.0, 0)
DISCRETE_INPUTX_STREAM(NODE_04, 3, 1.0, 0)
DISCRETE_INPUT_DATA(NODE_11)
DISCRETE_INPUT_DATA(NODE_12)
DISCRETE_INPUT_DATA(NODE_13)
DISCRETE_RCFILTER_SW(NODE_21, 1, NODE_01, NODE_11, 1000, CAP_U(0.22), 0, 0, 0)
DISCRETE_RCFILTER_SW(NODE_22, 1, NODE_02, NODE_12, 1000, CAP_U(0.22), 0, 0, 0)
DISCRETE_RCFILTER_SW(NODE_23, 1, NODE_03, NODE_13, 1000, CAP_U(0.22), 0, 0, 0)
DISCRETE_MIXER3(NODE_30, 1, NODE_21, NODE_22, NODE_23, &ironhors_mixer_desc)
DISCRETE_RCFILTER(NODE_31,1,NODE_04, RES_K(1), CAP_N(33) )
DISCRETE_MIXER2(NODE_33, 1, NODE_30, NODE_31, &ironhors_mixer_desc_final)
DISCRETE_OUTPUT(NODE_33, 5.0 )
DISCRETE_SOUND_END
static const struct YM2203interface ym2203_interface =
{
@ -422,19 +464,18 @@ static MACHINE_DRIVER_START( ironhors )
/* sound hardware */
MDRV_SPEAKER_STANDARD_MONO("mono")
MDRV_SOUND_ADD(YM2203, 18432000/6)
MDRV_SOUND_ADD_TAG("ym2203", YM2203, 18432000/6)
MDRV_SOUND_CONFIG(ym2203_interface)
MDRV_SOUND_ROUTE(0, "filter1", 0.40)
MDRV_SOUND_ROUTE(1, "filter2", 0.40)
MDRV_SOUND_ROUTE(2, "filter3", 0.40)
MDRV_SOUND_ROUTE(3, "mono", 0.40)
MDRV_SOUND_ROUTE_EX(0, "disc_ih", 1.0, 0)
MDRV_SOUND_ROUTE_EX(1, "disc_ih", 1.0, 1)
MDRV_SOUND_ROUTE_EX(2, "disc_ih", 1.0, 2)
MDRV_SOUND_ROUTE_EX(3, "disc_ih", 1.0, 3)
MDRV_SOUND_ADD_TAG("filter1", FILTER_RC, 0)
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MDRV_SOUND_ADD_TAG("filter2", FILTER_RC, 0)
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MDRV_SOUND_ADD_TAG("filter3", FILTER_RC, 0)
MDRV_SOUND_ADD_TAG("disc_ih", DISCRETE, 0)
MDRV_SOUND_CONFIG_DISCRETE(ironhors)
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_DRIVER_END