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/*
* Copyright (c) 1992, 1993, 1996
* Berkeley Software Design, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Berkeley Software
* Design, Inc.
*
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* BSDI int2f.c,v 2.2 1996/04/08 19:32:53 bostic Exp
*
* $FreeBSD$
*/
#include "doscmd.h"
#include "dispatch.h"
/*
** Multiplex interrupt.
**
** subfunctions 0-0x7f reserved for DOS, some are implemented here.
**
*/
/*
** 2f:00 2f:01 2f:02 2f:03
**
** Various PRINT.COM functions
*/
static int
int2f_printer(regcontext_t *REGS)
{
debug (D_FILE_OPS, "Called printer function 0x%02x", R_AH);
R_AL = FUNC_NUM_IVALID;
}
/*
** 2f:12
**
** DOS internal functions. Only one we support is 0x2e, and then only to
** complain about it.
*/
static int
int2f_dosinternal(regcontext_t *REGS)
{
switch (R_AL) {
case 0x2e: /* XXX - GET/SET ERROR TABLE ADDRESSES */
switch (R_DL) {
case 0x00:
case 0x02:
case 0x04:
case 0x06:
debug(D_ALWAYS,"DOS program attempted to get internal error table.\n");
break;
case 0x01:
case 0x03:
case 0x05:
case 0x07:
case 0x09:
debug(D_ALWAYS,"DOS program attempted to set error table.\n");
break;
}
default:
unknown_int4(0x2f, 0x12, R_AL, R_DL, REGS);
break;
}
R_AL = FUNC_NUM_IVALID;
return(0);
}
/*
** 2f:16
**
** Windows Enhanced Mode functions. Aigh!
*/
static int
int2f_windows(regcontext_t *REGS)
{
switch (R_AL) {
case 0x00:
R_AL = 0x00; /* Neither Win 3.x nor 2.x running */
return(0);
case 0x80: /* installation check */
tty_pause();
R_AL = 0x00;
return(0);
default:
unknown_int3(0x2f, 0x16, R_AL, REGS);
break;
}
R_AL = FUNC_NUM_IVALID;
return(0);
}
/*
** 2f:43
**
** XMS interface
*/
static int
int2f_xms(regcontext_t *REGS)
{
switch(R_AL) {
case 0: /* installation check */
return(0); /* %al = 0 */
default:
R_AL = FUNC_NUM_IVALID;
return(0);
}
}
static struct intfunc_table int2f_table[] = {
{ 0x00, IFT_NOSUBFUNC, int2f_printer, "printer"},
{ 0x01, IFT_NOSUBFUNC, int2f_printer, "printer"},
{ 0x02, IFT_NOSUBFUNC, int2f_printer, "printer"},
{ 0x03, IFT_NOSUBFUNC, int2f_printer, "printer"},
{ 0x12, IFT_NOSUBFUNC, int2f_dosinternal, "DOS internal function"},
{ 0x16, IFT_NOSUBFUNC, int2f_windows, "Windows detect"},
{ 0x43, IFT_NOSUBFUNC, int2f_xms, "XMS"},
{ -1, 0, NULL, NULL}
};
/*
** int2f (multiplex) handler.
**
** Note that due to the widely varied and inconsistent conventions, handlers
** called from here are expected to manage their own return values.
*/
void
int2f(regcontext_t *REGS)
{
int index;
/* look up the handler for the current function */
index = intfunc_search(int2f_table, R_AH, R_AL);
if (index >= 0) { /* respond on multiplex chain */
int2f_table[index].handler(REGS);
} else {
unknown_int2(0x2f, R_AH, REGS);
}
}
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