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- floppy hardware interrupt handler issues 'sense interrupt status' if there

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are no result bytes to read
This commit is contained in:
Volker Ruppert 2002-01-24 20:32:22 +00:00
parent dde7bd3a61
commit 14679e9413
2 changed files with 29 additions and 4 deletions
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bochs/bios/BIOS-bochs-latest
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33
bochs/bios/rombios.c
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: rombios.c,v 1.30 2002-01-20 00:25:12 vruppert Exp $
// $Id: rombios.c,v 1.31 2002-01-24 20:31:40 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
@ -273,10 +273,10 @@ static void boot_failure_msg();
static void nmi_handler_msg();
static void print_bios_banner();
static char bios_cvs_version_string[] = "$Revision: 1.30 $";
static char bios_date_string[] = "$Date: 2002-01-20 00:25:12 $";
static char bios_cvs_version_string[] = "$Revision: 1.31 $";
static char bios_date_string[] = "$Date: 2002-01-24 20:31:40 $";
static char CVSID[] = "$Id: rombios.c,v 1.30 2002-01-20 00:25:12 vruppert Exp $";
static char CVSID[] = "$Id: rombios.c,v 1.31 2002-01-24 20:31:40 vruppert Exp $";
/* Offset to skip the CVS $Id: prefix */
#define bios_version_string (CVSID + 4)
@ -5122,6 +5122,30 @@ i13d_f01:
.org 0xef57 ; INT 0Eh Diskette Hardware ISR Entry Point
int0e_handler:
push ax
push dx
mov dx, #0x03f4
in al, dx
and al, #0xc0
cmp al, #0xc0
je int0e_normal
mov dx, #0x03f5
mov al, #0x08 ; sense interrupt status
out dx, al
int0e_loop1:
mov dx, #0x03f4
in al, dx
and al, #0xc0
cmp al, #0xc0
jne int0e_loop1
int0e_loop2:
mov dx, #0x03f5
in al, dx
mov dx, #0x03f4
in al, dx
and al, #0xc0
cmp al, #0xc0
je int0e_loop2
int0e_normal:
push ds
mov ax, #0x0000 ;; segment 0000
mov ds, ax
@ -5131,6 +5155,7 @@ int0e_handler:
or al, #0x80 ;; diskette interrupt has occurred
mov 0x043e, al
pop ds
pop dx
pop ax
iret