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mpu4hw.c: reduced tagmap lookups (nw)

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C:\mame>mame64d0159 m4twintm -str 2 -w
533317 tagmap lookups

C:\mame>mame64d m4twintm -str 2 -w
6464 tagmap lookups
This commit is contained in:
Ivan Vangelista 2015-03-04 19:10:36 +01:00
parent 35cdc22c80
commit 655bd1ca31
1 changed files with 3 additions and 21 deletions
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24
src/mame/drivers/mpu4hw.c
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@ -1388,24 +1388,6 @@ and t1 is the initial value in clock 1.
*/
//O3 -> G1 O1 -> c2 o2 -> c1
WRITE8_MEMBER(mpu4_state::ic3ss_o1_callback)
{
device_t * device = machine().device("ptm_ic3ss");
downcast<ptm6840_device *>(device)->set_c2(data);
}
WRITE8_MEMBER(mpu4_state::ic3ss_o2_callback)//Generates 'beep' tone
{
device_t * device = machine().device("ptm_ic3ss");
downcast<ptm6840_device *>(device)->set_c1(data);//?
}
WRITE8_MEMBER(mpu4_state::ic3ss_o3_callback)
{
//downcast<ptm6840_device *>(device)->set_g1(data); /* this output is the clock for timer1 */
}
/* This is a bit of a cheat - since we don't clock into the OKI chip directly, we need to
calculate the oscillation frequency in advance. We're running the timer for interrupt
@ -2661,9 +2643,9 @@ MACHINE_CONFIG_FRAGMENT( mpu4_common2 )
MCFG_DEVICE_ADD("ptm_ic3ss", PTM6840, 0)
MCFG_PTM6840_INTERNAL_CLOCK(MPU4_MASTER_CLOCK / 4)
MCFG_PTM6840_EXTERNAL_CLOCKS(0, 0, 0)
MCFG_PTM6840_OUT0_CB(WRITE8(mpu4_state, ic3ss_o1_callback))
MCFG_PTM6840_OUT1_CB(WRITE8(mpu4_state, ic3ss_o2_callback))
MCFG_PTM6840_OUT2_CB(WRITE8(mpu4_state, ic3ss_o3_callback))
MCFG_PTM6840_OUT0_CB(DEVWRITELINE("ptm_ic3ss", ptm6840_device, set_c2))
MCFG_PTM6840_OUT1_CB(DEVWRITELINE("ptm_ic3ss", ptm6840_device, set_c1))
//MCFG_PTM6840_OUT2_CB(DEVWRITELINE("ptm_ic3ss", ptm6840_device, set_g1))
//MCFG_PTM6840_IRQ_CB(WRITELINE(mpu4_state, cpu1_ptm_irq))
MCFG_DEVICE_ADD("pia_ic4ss", PIA6821, 0)