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author Phil Bennett <philipjbennett@users.noreply.github.com>2010-07-15 10:53:29 +0000
committer Phil Bennett <philipjbennett@users.noreply.github.com>2010-07-15 10:53:29 +0000
commit616ea71eb6b97a25350ccaea5ddb682ea231b2ad (patch)
treed8f836a90aeaa30b07e89f50f2ed0ce3fb8ce01c /src/emu
parent81f4046df821186241cc7117d406af64430c7a33 (diff)
* Fixed some bugs in the MB88xx CPU core [Alex Jackson]
Diffstat (limited to 'src/emu')
-rw-r--r--src/emu/cpu/mb88xx/mb88xx.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/src/emu/cpu/mb88xx/mb88xx.c b/src/emu/cpu/mb88xx/mb88xx.c
index 59f1ef960c3..32cb4787468 100644
--- a/src/emu/cpu/mb88xx/mb88xx.c
+++ b/src/emu/cpu/mb88xx/mb88xx.c
@@ -245,7 +245,7 @@ static int pla( mb88_state *cpustate, int inA, int inB )
static void set_irq_line(mb88_state *cpustate, int state)
{
/* on falling edge trigger interrupt */
- if ( (cpustate->pio & 0x04) && cpustate->nf && state == CLEAR_LINE )
+ if ( (cpustate->pio & 0x04) && cpustate->nf == 0 && state != CLEAR_LINE )
{
cpustate->pending_interrupt |= INT_CAUSE_EXTERNAL;
}
@@ -593,7 +593,7 @@ static CPU_EXECUTE( mb88 )
case 0x24: /* tstr ZCS:..x */
arg = READPORT( MB88_PORTR0+(cpustate->Y/4) );
- cpustate->st = ( arg & ( 1 << (cpustate->Y%4) ) ) ? 1 : 0;
+ cpustate->st = ( arg & ( 1 << (cpustate->Y%4) ) ) ? 0 : 1;
break;
case 0x25: /* tsti ZCS:..x */
@@ -679,7 +679,7 @@ static CPU_EXECUTE( mb88 )
case 0x38: case 0x39: case 0x3a: case 0x3b: /* tbit ZCS:... */
arg = RDMEM(GETEA());
- cpustate->st = ( arg & (1 << (opcode&3) ) ) ? 1 : 0;
+ cpustate->st = ( arg & (1 << (opcode&3) ) ) ? 0 : 1;
break;
case 0x3c: /* rti ZCS:... */
@@ -729,11 +729,11 @@ static CPU_EXECUTE( mb88 )
case 0x48: case 0x49: case 0x4a: case 0x4b: /* tstD ZCS:..x */
arg = READPORT(MB88_PORTR2);
- cpustate->st = (arg & (1 << (opcode&3))) ? 1 : 0;
+ cpustate->st = (arg & (1 << (opcode&3))) ? 0 : 1;
break;
case 0x4c: case 0x4d: case 0x4e: case 0x4f: /* tba ZCS:..x */
- cpustate->st = (cpustate->A & (1 << (opcode&3))) ? 1 : 0;
+ cpustate->st = (cpustate->A & (1 << (opcode&3))) ? 0 : 1;
break;
case 0x50: case 0x51: case 0x52: case 0x53: /* xd ZCS:x.. */