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