From 0b12c58d77572cd8150e4d2fe82361f6e159418c Mon Sep 17 00:00:00 2001
From: Sjoerd van der Berg <harekiet@users.sourceforge.net>
Date: Tue, 8 Jul 2003 16:46:28 +0000
Subject: [PATCH] Check for interrupt flag and waiting irq's on moments where
 flags are changed.

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1095
---
 src/cpu/core_full/load.h | 11 +++++++----
 src/cpu/core_full/save.h |  8 ++++++++
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/src/cpu/core_full/load.h b/src/cpu/core_full/load.h
index 97e2b348..86634ccc 100644
--- a/src/cpu/core_full/load.h
+++ b/src/cpu/core_full/load.h
@@ -268,6 +268,10 @@ l_M_Ed:
 		flags.type=t_UNKNOWN;
 		CPU_IRET(false);
 		LoadIP();
+		if (GETFLAG(IF) && PIC_IRQCheck) {
+			SaveIP();	
+			return CBRET_NONE;
+		}
 		goto nextopcode;
 	case D_IRETd:
 		flags.type=t_UNKNOWN;
@@ -346,10 +350,9 @@ l_M_Ed:
 		goto nextopcode;
 	case D_STI:
 		SETFLAGBIT(IF,true);
-		if (PIC_IRQCheck) {
-			SaveIP();
-			PIC_runIRQs();	
-			LoadIP();
+		if (GETFLAG(IF) && PIC_IRQCheck) {
+			LEAVECORE;	
+			return CBRET_NONE;
 		}
 		goto nextopcode;
 	case D_STC:
diff --git a/src/cpu/core_full/save.h b/src/cpu/core_full/save.h
index 9e849d18..a5e97eb1 100644
--- a/src/cpu/core_full/save.h
+++ b/src/cpu/core_full/save.h
@@ -103,9 +103,17 @@ switch (inst.code.save) {
 		break;
 	case S_FLGw:
 		SETFLAGSw(inst.op1.w);
+		if (GETFLAG(IF) && PIC_IRQCheck) {
+			SaveIP();	
+			return CBRET_NONE;
+		}
 		break;
 	case S_FLGd:
 		SETFLAGSd(inst.op1.d);
+		if (GETFLAG(IF) && PIC_IRQCheck) {
+			SaveIP();	
+			return CBRET_NONE;
+		}
 		break;
 	case 0:
 		break;