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a bit faster this way =)

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This commit is contained in:
Michaël Banaan Ananas 2014-04-19 17:11:31 +00:00
parent 4232420bda
commit ee6e952772
1 changed files with 10 additions and 16 deletions
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26
src/mame/drivers/tempest.c
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@ -329,7 +329,7 @@ public:
DECLARE_READ8_MEMBER(input_port_1_bit_r);
DECLARE_READ8_MEMBER(input_port_2_bit_r);
DECLARE_READ8_MEMBER(rom_read);
DECLARE_READ8_MEMBER(rom_ae1f_r);
virtual void machine_start();
};
@ -421,17 +421,15 @@ WRITE8_MEMBER(tempest_state::tempest_coin_w)
*
*************************************/
READ8_MEMBER(tempest_state::rom_read)
READ8_MEMBER(tempest_state::rom_ae1f_r)
{
const UINT8 *rom = m_rom->base();
const int real_addr = offset + 0xa800;
// This is needed to ensure that the routine starting at ae1c passes checks and does not corrupt data;
// MCFG_QUANTUM_PERFECT_CPU("maincpu") would be very taxing on this driver.
machine().scheduler().boost_interleave(attotime::zero, attotime::from_usec(100));
machine().scheduler().abort_timeslice();
if (real_addr == 0xAE1F)
{
machine().scheduler().boost_interleave(attotime::zero, attotime::from_usec(100));
machine().scheduler().abort_timeslice();
}
return rom[real_addr];
const UINT8 *rom = m_rom->base();
return rom[0xae1f];
}
@ -456,9 +454,8 @@ static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8, tempest_state )
AM_RANGE(0x60c0, 0x60cf) AM_DEVREADWRITE("pokey1", pokey_device, read, write)
AM_RANGE(0x60d0, 0x60df) AM_DEVREADWRITE("pokey2", pokey_device, read, write)
AM_RANGE(0x60e0, 0x60e0) AM_WRITE(tempest_led_w)
AM_RANGE(0x9000, 0xa7ff) AM_ROM
AM_RANGE(0xa800, 0xafff) AM_READ(rom_read)
AM_RANGE(0xb000, 0xdfff) AM_ROM
AM_RANGE(0xae1f, 0xae1f) AM_READ(rom_ae1f_r)
AM_RANGE(0x9000, 0xdfff) AM_ROM
AM_RANGE(0xf000, 0xffff) AM_ROM /* for the reset / interrupt vectors */
ADDRESS_MAP_END
@ -629,9 +626,6 @@ static MACHINE_CONFIG_START( tempest, tempest_state )
MCFG_CPU_ADD("maincpu", M6502, MASTER_CLOCK / 8)
MCFG_CPU_PROGRAM_MAP(main_map)
/* needed to ensure routine at ae1c passes checks and does not corrupt data */
// MCFG_QUANTUM_PERFECT_CPU("maincpu")
MCFG_CPU_PERIODIC_INT_DRIVER(tempest_state, irq0_line_assert, CLOCK_3KHZ / 12)
MCFG_WATCHDOG_TIME_INIT(attotime::from_hz(CLOCK_3KHZ / 256))