--- src/include/cpu.h	Wed Jun 26 21:58:32 2002
+++ src/include/cpu.h	Sat Jul 27 23:12:23 2002
@@ -198,6 +198,10 @@
 #define set_TF() (_EFLAGS |= TF)
 #define clear_TF() (_EFLAGS &= ~TF)
 #define isset_TF() ((_EFLAGS & TF) != 0)
+       /* alignment flag */
+#define set_AC() (_EFLAGS |= AC)
+#define clear_AC() (_EFLAGS &= ~AC)
+#define isset_AC() ((_EFLAGS & AC) != 0)
        /* Virtual Interrupt Pending flag */
 #define set_VIP()   (_EFLAGS |= VIP)
 #define clear_VIP() (_EFLAGS &= ~VIP)
--- src/emu-i386/do_vm86.c	Fri Jul 26 21:16:46 2002
+++ src/emu-i386/do_vm86.c	Sun Jul 28 00:06:46 2002
@@ -506,6 +506,14 @@
 	pic_iret();
 	break;
     case VM86_INTx:
+	/*
+	 * AC flag gets cleared by the INT instruction and is not restored
+	 * by IRET because it resides in the higher word of eflags and
+	 * hence not saved in the stack.
+	 * However we can't clear it in real_run_int() et al because
+	 * it is not cleared by hardware interrupts (???)
+	 */
+	clear_AC();
 #ifdef USE_MHPDBG
 	mhp_debug(DBG_INTx + (VM86_ARG(retval) << 8), 0, 0);
 #endif
--- src/dosext/dpmi/dpmi.c	Sun Jun 23 23:42:23 2002
+++ src/dosext/dpmi/dpmi.c	Sun Jul 28 00:07:35 2002
@@ -2240,6 +2227,14 @@
 		pic_iret();
 		break;
 	case VM86_INTx:
+	/*
+	 * AC flag gets cleared by the INT instruction and is not restored
+	 * by IRET because it resides in the higher word of eflags and
+	 * hence not saved in the stack.
+	 * However we can't clear it in real_run_int() et al because
+	 * it is not cleared by hardware interrupts (???)
+	 */
+		clear_AC();
 #ifdef X86_EMULATOR
 		D_printf("DPMI: Return from vm86() for interrupt\n");
 #endif