From c2b1f89fa2e6804bd7f16e608f5245f9a55a8431 Mon Sep 17 00:00:00 2001
From: Ulf Wohlers <finsterr@users.sourceforge.net>
Date: Sun, 27 Oct 2002 10:48:47 +0000
Subject: [PATCH] int 8 is now saving ds,dx,ax before calling int 1c

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@452
---
 src/ints/bios.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/ints/bios.cpp b/src/ints/bios.cpp
index 64c80207..a3c5db35 100644
--- a/src/ints/bios.cpp
+++ b/src/ints/bios.cpp
@@ -104,9 +104,19 @@ static Bitu INT8_Handler(void) {
 	/* decrease floppy motor timer */
 	Bit8u val = mem_readb(BIOS_DISK_MOTOR_TIMEOUT);
 	if (val>0) mem_writeb(BIOS_DISK_MOTOR_TIMEOUT,val-1);
-	
+	/* and running drive */
+	mem_writeb(BIOS_DRIVE_RUNNING,mem_readb(BIOS_DRIVE_RUNNING) & 0xF0);
+	// Save ds,dx,ax
+	Bit16u oldds = SegValue(ds);
+	Bit16u olddx = reg_dx;
+	Bit16u oldax = reg_ax;
+	// run int 1c	
 	CALLBACK_RunRealInt(0x1c);
 	IO_Write(0x20,0x20);
+	// restore old values
+	SegSet16(ds,oldds);
+	reg_dx = olddx;
+	reg_ax = oldax;
 	return CBRET_NONE;
 };