--- np2/io/pic.c	2003/11/12 00:55:38	1.3
+++ np2/io/pic.c	2004/01/22 01:10:04	1.11
@@ -1,5 +1,5 @@
 #include	"compiler.h"
-#include	"i286.h"
+#include	"cpucore.h"
 #include	"pccore.h"
 #include	"iocore.h"
 
@@ -63,6 +63,7 @@ void extirq_pop(void) {
 		*(UINT32 *)(p->pi[1].level+0) = *(UINT32 *)(p->pi[1].levelbak+0);
 		*(UINT32 *)(p->pi[1].level+4) = *(UINT32 *)(p->pi[1].levelbak+4);
 		p->pi[1].isr = p->pi[1].isrbak;
+//		TRACEOUT(("iret: extirq_pop"));
 	}
 }
 
@@ -79,7 +80,7 @@ static void pic_rolpry(PICITEM pi) {
 }
 
 
-static void pic_downbylevel(PICITEM picp, BYTE level) {
+static void pic_downbylevel(PICITEM picp, UINT level) {
 
 	int		i;
 
@@ -93,13 +94,13 @@ static void pic_downbylevel(PICITEM picp
 
 
 // eoi処理
-static void pic_forceeoibylevel(PICITEM picp, BYTE level) {
+static void pic_forceeoibylevel(PICITEM picp, UINT level) {
 
 	int		i;
 
 	if (picp->isr & (1 << level)) {
 		picp->isr &= ~(1 << level);
-		(picp->levels)--;
+		picp->levels--;
 		for (i=0; (i<picp->levels) && (picp->level[i] != level); i++) { }
 		for (; i<picp->levels; i++) {
 			picp->level[i] = picp->level[i+1];
@@ -112,7 +113,7 @@ void pic_irq(void) {
 
 	int		i;
 	BYTE	bit;
-	char	pry;
+	SINT8	pry;
 	BYTE	irq;
 	BYTE	sirq;
 	BYTE	targetbit;
@@ -121,7 +122,7 @@ void pic_irq(void) {
 	p = &pic;
 
 	// 割込み許可で　要求あり？
-	if ((isI286EI) && (!p->ext_irq) &&
+	if ((CPU_isEI) && (!p->ext_irq) &&
 		((p->pi[0].irr & (~p->pi[0].imr)) ||
 			(p->pi[1].irr & (~p->pi[1].imr)))) {
 
@@ -130,14 +131,14 @@ void pic_irq(void) {
 			pry = -1;
 		}
 		else {
-			pry = (char)p->pi[0].pry[p->pi[0].level[p->pi[0].levels - 1]];
+			pry = (SINT8)p->pi[0].pry[p->pi[0].level[p->pi[0].levels - 1]];
 		}
 		irq = 0xff;
 		targetbit = 0;
-		for (bit=1, i=0; bit; bit<<=1, i++) {
+		for (bit=1, i=0; i<8; bit<<=1, i++) {
 			if ((p->pi[0].irr & bit) &&
 				(!((p->pi[0].imr | p->pi[0].isr) & bit))) {
-				if ((char)p->pi[0].pry[i] > pry) {
+				if ((SINT8)p->pi[0].pry[i] > pry) {
 					pry = p->pi[0].pry[i];
 					irq = (BYTE)i;
 					targetbit = bit;
@@ -152,7 +153,7 @@ void pic_irq(void) {
 			sirq = p->pi[1].icw[2] & 7;
 			bit = 1 << sirq;
 			if (!((p->pi[0].imr | p->pi[0].isr) & bit)) {
-				if ((char)p->pi[0].pry[sirq] > pry) {
+				if ((SINT8)p->pi[0].pry[sirq] > pry) {
 					irq = sirq;
 					targetbit = bit;
 				}
@@ -170,7 +171,8 @@ void pic_irq(void) {
 				if (irq == 0) {									// ver0.28
 					nevent_reset(NEVENT_PICMASK);
 				}
-				i286_interrupt((BYTE)((p->pi[0].icw[1] & 0xf8) | irq));
+// TRACEOUT(("hardware-int %.2x", (p->pi[0].icw[1] & 0xf8) | irq));
+				CPU_INTERRUPT((REG8)((p->pi[0].icw[1] & 0xf8) | irq));
 				return;
 			}
 			if ((!p->pi[0].levels) ||
@@ -183,13 +185,13 @@ void pic_irq(void) {
 			pry = -1;
 		}
 		else {
-			pry = (char)p->pi[1].pry[p->pi[1].level[p->pi[1].levels - 1]];
+			pry = (SINT8)p->pi[1].pry[p->pi[1].level[p->pi[1].levels - 1]];
 		}
 		targetbit = 0;
-		for (bit=1, i=0; bit; bit<<=1, i++) {
+		for (bit=1, i=0; i<8; bit<<=1, i++) {
 			if ((p->pi[1].irr & bit) &&
 				(!((p->pi[1].imr | p->pi[1].isr) & bit))) {
-				if ((char)p->pi[1].pry[i] > pry) {
+				if ((SINT8)p->pi[1].pry[i] > pry) {
 					pry = p->pi[1].pry[i];
 					irq = (BYTE)i;
 					targetbit = bit;
@@ -211,8 +213,8 @@ void pic_irq(void) {
 					p->pi[0].irr &= ~(1 << sirq);
 					p->pi[0].level[p->pi[0].levels++] = sirq;
 				}
-// TRACEOUT(("hardware int %.2x", (p->pi[1].icw[1] & 0xf8) | irq));
-				i286_interrupt((BYTE)((p->pi[1].icw[1] & 0xf8) | irq));
+// TRACEOUT(("hardware-int %.2x", (p->pi[1].icw[1] & 0xf8) | irq));
+				CPU_INTERRUPT((REG8)((p->pi[1].icw[1] & 0xf8) | irq));
 			}
 		}
 	}
@@ -230,10 +232,10 @@ void picmask(NEVENTITEM item) {
 	}
 }
 
-void pic_setirq(BYTE irq) {
+void pic_setirq(REG8 irq) {
 
 	PICITEM	pi;
-	BYTE	bit;
+	REG8	bit;
 
 	pi = pic.pi;
 	bit = 1 << (irq & 7);
@@ -243,12 +245,12 @@ void pic_setirq(BYTE irq) {
 			if (bit & PIC_SYSTEMTIMER) {
 				if ((pit.mode[0] & 0x0c) == 0x04) {
 					SINT32 cnt;										// ver0.29
-					if (pit.value[0].w > 8) {
-						cnt = pc.multiple * pit.value[0].w;
+					if (pit.value[0] > 8) {
+						cnt = pccore.multiple * pit.value[0];
 						cnt >>= 2;
 					}
 					else {
-						cnt = pc.multiple << (16 - 2);
+						cnt = pccore.multiple << (16 - 2);
 					}
 					nevent_set(NEVENT_PICMASK, cnt, picmask, NEVENT_ABSOLUTE);
 				}
@@ -266,7 +268,7 @@ void pic_setirq(BYTE irq) {
 	}
 }
 
-void pic_resetirq(BYTE irq) {
+void pic_resetirq(REG8 irq) {
 
 	PICITEM		pi;
 
@@ -274,8 +276,7 @@ void pic_resetirq(BYTE irq) {
 	pi->irr &= ~(1 << (irq & 7));
 }
 
-
-void pic_registext(BYTE irq) {
+void pic_registext(REG8 irq) {
 
 	PICITEM		pi;
 
@@ -286,10 +287,10 @@ void pic_registext(BYTE irq) {
 
 // ---- I/O
 
-static void IOOUTCALL pic_o00(UINT port, BYTE dat) {
+static void IOOUTCALL pic_o00(UINT port, REG8 dat) {
 
 	PICITEM		picp;
-	BYTE		level;
+	UINT		level;
 
 //	TRACEOUT(("pic %x %x", port, dat));
 	picp = &pic.pi[(port >> 3) & 1];
@@ -337,14 +338,33 @@ static void IOOUTCALL pic_o00(UINT port,
 	}
 }
 
-static void IOOUTCALL pic_o02(UINT port, BYTE dat) {
+#if defined(TRACE)
+extern int piccnt;
+#endif
+
+static void IOOUTCALL pic_o02(UINT port, REG8 dat) {
 
 	PICITEM		picp;
 
 //	TRACEOUT(("pic %x %x", port, dat));
 	picp = &pic.pi[(port >> 3) & 1];
 	if (!picp->writeicw) {
+#if 1	// マスクのセットだけなら nevent_forceexit()をコールしない
+		if ((CPU_isDI) || (pic.ext_irq) ||
+			((picp->imr & dat) == picp->imr)) {
+			picp->imr = dat;
+			return;
+		}
+		// リセットされたビットは割り込みある？
+		if (!(picp->irr & (picp->imr & (~dat)))) {
+			picp->imr = dat;
+			return;
+		}
+#endif
 		picp->imr = dat;
+#if defined(TRACE)
+		piccnt++;
+#endif
 	}
 	else {
 		picp->icw[picp->writeicw] = dat;
@@ -356,7 +376,7 @@ static void IOOUTCALL pic_o02(UINT port,
 	nevent_forceexit();
 }
 
-static BYTE IOINPCALL pic_i00(UINT port) {
+static REG8 IOINPCALL pic_i00(UINT port) {
 
 	PICITEM		picp;
 
@@ -373,7 +393,7 @@ static BYTE IOINPCALL pic_i00(UINT port)
 	}
 }
 
-static BYTE IOINPCALL pic_i02(UINT port) {
+static REG8 IOINPCALL pic_i02(UINT port) {
 
 	PICITEM		picp;
 
@@ -394,6 +414,7 @@ void pic_reset(void) {
 
 	pic.pi[0] = def_master;
 	pic.pi[1] = def_slave;
+	pic.ext_irq = 0;
 }
 
 void pic_bind(void) {