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-rw-r--r--src/mame/audio/snes_snd.cpp3
-rw-r--r--src/mame/drivers/nss.cpp3
-rw-r--r--src/mame/drivers/sfcbox.cpp3
-rw-r--r--src/mame/drivers/snes.cpp3
-rw-r--r--src/mame/drivers/snesb.cpp3
5 files changed, 10 insertions, 5 deletions
diff --git a/src/mame/audio/snes_snd.cpp b/src/mame/audio/snes_snd.cpp
index d8dc6ab583f..42b206c2072 100644
--- a/src/mame/audio/snes_snd.cpp
+++ b/src/mame/audio/snes_snd.cpp
@@ -1156,7 +1156,8 @@ WRITE8_MEMBER( snes_sound_device::spc_io_w )
case 0x7: /* Port 3 */
// osd_printf_debug("SPC: %02x to APU @ %d %s\n", data, offset & 3, machine().describe_context());
m_port_out[offset - 4] = data;
- machine().scheduler().boost_interleave(attotime::zero, attotime::from_usec(20));
+ // Unneeded, we already run at perfect_interleave
+ // machine().scheduler().boost_interleave(attotime::zero, attotime::from_usec(20));
break;
case 0xa: /* Timer 0 */
case 0xb: /* Timer 1 */
diff --git a/src/mame/drivers/nss.cpp b/src/mame/drivers/nss.cpp
index 57ce1816ca7..67b7bc3a70c 100644
--- a/src/mame/drivers/nss.cpp
+++ b/src/mame/drivers/nss.cpp
@@ -823,7 +823,8 @@ static MACHINE_CONFIG_START( nss )
MCFG_CPU_ADD("maincpu", _5A22, MCLK_NTSC) /* 2.68Mhz, also 3.58Mhz */
MCFG_CPU_PROGRAM_MAP(snes_map)
- MCFG_CPU_ADD("soundcpu", SPC700, 2048000/2) /* 2.048 Mhz, but internal divider */
+ // runs at 24.576 MHz / 12 = 2.048 MHz
+ MCFG_CPU_ADD("soundcpu", SPC700, XTAL_24_576MHz / 12)
MCFG_CPU_PROGRAM_MAP(spc_mem)
MCFG_QUANTUM_PERFECT_CPU("maincpu")
diff --git a/src/mame/drivers/sfcbox.cpp b/src/mame/drivers/sfcbox.cpp
index 1317fa7a7bc..4e03d1f0285 100644
--- a/src/mame/drivers/sfcbox.cpp
+++ b/src/mame/drivers/sfcbox.cpp
@@ -451,7 +451,8 @@ static MACHINE_CONFIG_START( sfcbox )
MCFG_CPU_ADD("maincpu", _5A22, 3580000*6) /* 2.68Mhz, also 3.58Mhz */
MCFG_CPU_PROGRAM_MAP(snes_map)
- MCFG_CPU_ADD("soundcpu", SPC700, 2048000/2) /* 2.048 Mhz, but internal divider */
+ // runs at 24.576 MHz / 12 = 2.048 MHz
+ MCFG_CPU_ADD("soundcpu", SPC700, XTAL_24_576MHz / 12)
MCFG_CPU_PROGRAM_MAP(spc_mem)
MCFG_QUANTUM_PERFECT_CPU("maincpu")
diff --git a/src/mame/drivers/snes.cpp b/src/mame/drivers/snes.cpp
index b0280949519..eb3b2e51ae8 100644
--- a/src/mame/drivers/snes.cpp
+++ b/src/mame/drivers/snes.cpp
@@ -1331,7 +1331,8 @@ static MACHINE_CONFIG_START( snes )
MCFG_CPU_ADD("maincpu", _5A22, MCLK_NTSC) /* 2.68 MHz, also 3.58 MHz */
MCFG_CPU_PROGRAM_MAP(snes_map)
- MCFG_CPU_ADD("soundcpu", SPC700, XTAL_24_576MHz / 24) /* 1.024 MHz */
+ // runs at 24.576 MHz / 12 = 2.048 MHz
+ MCFG_CPU_ADD("soundcpu", SPC700, XTAL_24_576MHz / 12)
MCFG_CPU_PROGRAM_MAP(spc_map)
//MCFG_QUANTUM_TIME(attotime::from_hz(48000))
diff --git a/src/mame/drivers/snesb.cpp b/src/mame/drivers/snesb.cpp
index 277d445f285..bc90590097d 100644
--- a/src/mame/drivers/snesb.cpp
+++ b/src/mame/drivers/snesb.cpp
@@ -693,7 +693,8 @@ static MACHINE_CONFIG_START( kinstb )
MCFG_CPU_PROGRAM_MAP(snesb_map)
/* audio CPU */
- MCFG_CPU_ADD("soundcpu", SPC700, 2048000/2) /* 2.048 Mhz, but internal divider */
+ // runs at 24.576 MHz / 12 = 2.048 MHz
+ MCFG_CPU_ADD("soundcpu", SPC700, XTAL_24_576MHz / 12)
MCFG_CPU_PROGRAM_MAP(spc_mem)
MCFG_QUANTUM_PERFECT_CPU("maincpu")