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Reworked 1942 interrupts by not using cpu_getiloops() function [Angelo Salese]

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This commit is contained in:
Angelo Salese 2010-10-19 17:52:26 +00:00
parent 66fb765d2b
commit 8aea6d8cd3
1 changed files with 10 additions and 8 deletions
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18
src/mame/drivers/1942.c
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@ -65,7 +65,6 @@ correctly.
#include "emu.h"
#include "cpu/z80/z80.h"
#include "deprecat.h"
#include "sound/ay8910.h"
#include "includes/1942.h"
@ -75,12 +74,15 @@ static WRITE8_HANDLER( c1942_bankswitch_w )
memory_set_bank(space->machine, "bank1", data & 0x03);
}
static INTERRUPT_GEN( c1942_interrupt )
static TIMER_DEVICE_CALLBACK( c1942_scanline )
{
if (cpu_getiloops(device) != 0)
cpu_set_input_line_and_vector(device, 0, HOLD_LINE, 0xcf); /* RST 08h */
else
cpu_set_input_line_and_vector(device, 0, HOLD_LINE, 0xd7); /* RST 10h - vblank */
int scanline = param;
if(scanline == 240) // vblank-out irq
cputag_set_input_line_and_vector(timer.machine, "maincpu", 0, HOLD_LINE, 0xd7); /* RST 10h - vblank */
if(scanline == 0) // unknown irq event, presumably vblank-in or a periodic one (writes to the soundlatch and drives freeze dip-switch)
cputag_set_input_line_and_vector(timer.machine, "maincpu", 0, HOLD_LINE, 0xcf); /* RST 08h */
}
@ -258,11 +260,11 @@ static MACHINE_CONFIG_START( 1942, _1942_state )
/* basic machine hardware */
MDRV_CPU_ADD("maincpu", Z80, MAIN_CPU_CLOCK) /* 4 MHz ??? */
MDRV_CPU_PROGRAM_MAP(c1942_map)
MDRV_CPU_VBLANK_INT_HACK(c1942_interrupt,2)
MDRV_TIMER_ADD_SCANLINE("scantimer", c1942_scanline, "screen", 0, 1)
MDRV_CPU_ADD("audiocpu", Z80, SOUND_CPU_CLOCK) /* 3 MHz ??? */
MDRV_CPU_PROGRAM_MAP(sound_map)
MDRV_CPU_VBLANK_INT_HACK(irq0_line_hold,4)
MDRV_CPU_PERIODIC_INT(irq0_line_hold,4*60)
MDRV_MACHINE_START(1942)
MDRV_MACHINE_RESET(1942)