X-Git-Url: http://gitweb.hugovil.com/?a=blobdiff_plain;f=src%2Fcpu8051.c;h=55e761a75e4a4c431b23d406df6c9ff4218bb22e;hb=98b757f83d9e4be02e9373f3279d432d3f7113f5;hp=213f61bbc120cac1a3df597002a4a1f10712912d;hpb=70b6c9964ce7dbe0457af41067a7d3c6e044bbbf;p=emu8051.git

diff --git a/src/cpu8051.c b/src/cpu8051.c
index 213f61b..55e761a 100644
--- a/src/cpu8051.c
+++ b/src/cpu8051.c
@@ -28,6 +28,7 @@
 #include "reg8051.h"
 #include "cpu8051.h"
 #include "memory.h"
+#include "psw.h"
 #include "disasm.h"
 #include "instructions_8051.h"
 
@@ -211,12 +212,7 @@ cpu8051_ReadB(uint8_t bit_address)
 static void
 cpu8051_process_interrupt(int pc, int pri)
 {
-	unsigned char SP;
-
-	SP = cpu8051_ReadD(_SP_);
-	cpu8051_WriteI(++SP, (cpu8051.pc & 0xFF));
-	cpu8051_WriteI(++SP, (cpu8051.pc >> 8));
-	cpu8051_WriteD(_SP_, SP);
+	stack_push16(pc);
 	cpu8051.pc = 0x0B;
 	cpu8051.active_priority = pri;
 }
@@ -379,6 +375,12 @@ cpu8051_Exec(void)
 	cpu8051.pc++;
 	insttiming = (*opcode_table[opcode])(); /* Function callback. */
 
+	/*
+	 * Parity bit (p): is automatically set or cleared in each machine
+	 * cycle to establish even parity in the accumulator.
+	 */
+	psw_compute_parity_bit();
+
 	for (i = 0; i < insttiming; i++) {
 		cpu8051_CheckInterrupts();
 		cpu8051_DoTimers();