--- np2/i386c/ia32/interface.c	2004/03/08 12:56:22	1.17
+++ np2/i386c/ia32/interface.c	2004/05/23 15:01:45	1.21
@@ -1,4 +1,4 @@
-/*	$Id: interface.c,v 1.17 2004/03/08 12:56:22 monaka Exp $	*/
+/*	$Id: interface.c,v 1.21 2004/05/23 15:01:45 yui Exp $	*/
 
 /*
  * Copyright (c) 2002-2003 NONAKA Kimihiro
@@ -95,6 +95,16 @@ ia32shut(void)
 }
 
 void
+ia32a20enable(BOOL enable)
+{
+#if (CPU_FAMILY == 3)
+	CPU_ADRSMASK = (enable)?0x00ffffff:0x00ffffff;
+#else
+	CPU_ADRSMASK = (enable)?0xffffffff:0x00ffffff;
+#endif
+}
+
+void
 ia32(void)
 {
 	int rv;
@@ -185,10 +195,19 @@ ia32_step(void)
 }
 
 void CPUCALL
-ia32_interrupt(int vect)
+ia32_interrupt(int vect, int soft)
 {
 
-	INTERRUPT(vect, FALSE, FALSE, 0);
+//	TRACEOUT(("int (%x, %x) PE=%d VM=%d",  vect, soft, CPU_STAT_PM, CPU_STAT_VM86));
+	if (!soft) {
+		INTERRUPT(vect, FALSE, FALSE, 0);
+	}
+	else {
+		if (CPU_STAT_VM86 && (CPU_STAT_IOPL < CPU_IOPL3) && (soft == -1)) {
+			TRACEOUT(("BIOS interrupt: VM86 && IOPL < 3 && INTn"));
+		}
+		INTERRUPT(vect, TRUE, FALSE, 0);
+	}
 }
 
 
@@ -256,9 +275,15 @@ ia32_bioscall(void)
 	UINT32 adrs;
 
 	if (!CPU_STAT_PM || CPU_STAT_VM86) {
+#if 1
+		adrs = (CPU_EIP - 1) + ((CPU_REGS_SREG(CPU_CS_INDEX)) << 4);
+#else
 		adrs = (CPU_EIP - 1) + CPU_STAT_CS_BASE;
+#endif
 		if ((adrs >= 0xf8000) && (adrs < 0x100000)) {
-			biosfunc(adrs);
+			if (biosfunc(adrs)) {
+				CPU_PREFETCH_CLEAR();
+			}
 			if (!CPU_STAT_PM || CPU_STAT_VM86) {
 				CPU_SET_SEGREG(CPU_ES_INDEX, CPU_ES);
 				CPU_SET_SEGREG(CPU_CS_INDEX, CPU_CS);