From 61fffb166eac2d971214905bb64f8461bb18ba9d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Strohh=C3=A4cker?=
 <c2woody@users.sourceforge.net>
Date: Mon, 20 Nov 2006 17:35:53 +0000
Subject: [PATCH] enable interrupts when leaving int16/ax=1 as bios uses
 sti/retf2 (fixes Joust)

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2723
---
 src/ints/bios_keyboard.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/ints/bios_keyboard.cpp b/src/ints/bios_keyboard.cpp
index aa99c174..58350f70 100644
--- a/src/ints/bios_keyboard.cpp
+++ b/src/ints/bios_keyboard.cpp
@@ -505,6 +505,8 @@ static Bitu INT16_Handler(void) {
 		}
 		break;
 	case 0x01: /* CHECK FOR KEYSTROKE */
+		// enable interrupt-flag after IRET of this int16
+		mem_writew(SegPhys(ss)+reg_sp+4,(mem_readw(SegPhys(ss)+reg_sp+4) | FLAG_IF));
 		for (;;) {
 			if (check_key(temp)) {
 				if (!IsEnhancedKey(temp)) {