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berzerk: use volume filter device

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This commit is contained in:
hap 2022-10-07 13:49:27 +02:00
parent e65cb612cf
commit 2453ff4961
1 changed files with 10 additions and 6 deletions
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16
src/mame/stern/berzerk.cpp
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@ -61,6 +61,7 @@ Game difference analysis by The Cutting Room Floor (tcrf.net)
#include "cpu/z80/z80.h"
#include "machine/74181.h"
#include "machine/nvram.h"
#include "sound/flt_vol.h"
#include "sound/s14001a.h"
#include "screen.h"
@ -77,6 +78,7 @@ public:
driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_s14001a(*this, "speech"),
m_s14001a_volume(*this, "s14001a_volume"),
m_ls181_10c(*this, "ls181_10c"),
m_ls181_12c(*this, "ls181_12c"),
m_custom(*this, "exidy"),
@ -100,6 +102,7 @@ protected:
private:
required_device<cpu_device> m_maincpu;
required_device<s14001a_device> m_s14001a;
required_device<filter_volume_device> m_s14001a_volume;
required_device<ttl74181_device> m_ls181_10c;
required_device<ttl74181_device> m_ls181_12c;
required_device<exidy_sound_device> m_custom;
@ -599,8 +602,7 @@ void berzerk_state::audio_w(offs_t offset, uint8_t data)
case 1:
{
/* volume - 0 appears to be inaudible */
m_s14001a->force_update();
m_s14001a->set_output_gain(0, (data >> 3 & 7) / 7.0);
m_s14001a_volume->flt_volume_set_volume((data >> 3 & 7) / 7.0);
/* clock control - the first LS161 divides the clock by 9 to 16, the 2nd by 8,
giving a final clock from 19.5kHz to 34.7kHz */
@ -645,7 +647,6 @@ uint8_t berzerk_state::audio_r(offs_t offset)
}
void berzerk_state::sound_reset()
{
/* clears the flip-flop controlling the volume and freq on the speech chip */
@ -995,7 +996,7 @@ uint8_t berzerk_state::moonwarp_p1_r()
// one difference is it lacks the strobe input (does it?), which if not active causes
// the dial input to go open bus. This is used in moon war 2 to switch between player 1
// and player 2 dials, which share a single port. moonwarp uses separate ports for the dials.
signed char dialread = ioport("P1_DIAL")->read();
int8_t dialread = ioport("P1_DIAL")->read();
uint8_t ret;
uint8_t buttons = (ioport("P1")->read()&0xe0);
if (dialread < 0) m_p1_direction = 0;
@ -1010,7 +1011,7 @@ uint8_t berzerk_state::moonwarp_p1_r()
uint8_t berzerk_state::moonwarp_p2_r()
{
// same as above, but for player 2 in cocktail mode
signed char dialread = ioport("P2_DIAL")->read();
int8_t dialread = ioport("P2_DIAL")->read();
uint8_t ret;
uint8_t buttons = (ioport("P2")->read()&0xe0);
if (dialread < 0) m_p2_direction = 0;
@ -1187,7 +1188,10 @@ void berzerk_state::berzerk(machine_config &config)
/* audio hardware */
SPEAKER(config, "mono").front_center();
S14001A(config, m_s14001a, S14001_CLOCK/16/8).add_route(ALL_OUTPUTS, "mono", 1.00); /* placeholder - the clock is software controllable */
S14001A(config, m_s14001a, S14001_CLOCK/16/8); // placeholder clock - it is software controllable
m_s14001a->add_route(ALL_OUTPUTS, "s14001a_volume", 0.5);
FILTER_VOLUME(config, m_s14001a_volume).add_route(ALL_OUTPUTS, "mono", 1.0);
EXIDY(config, m_custom, 0).add_route(ALL_OUTPUTS, "mono", 0.33);
}