Add our doscmd to the tree. This is a result of work from BSDI, and

a group of dos emulator developers.
Submitted by:	Jonathan Lemon <jlemon@americantv.com>
Obtained from:	BSDI

1 files changed, 167 insertions, 0 deletions

diff --git a/usr.bin/doscmd/int2f.c b/usr.bin/doscmd/int2f.c
new file mode 100644
index 0000000..450d4d7
--- /dev/null
+++ b/usr.bin/doscmd/int2f.c
@@ -0,0 +1,167 @@
+/*
+ * 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
+ *
+ * $Id: int2f.c,v 1.4 1996/09/22 15:42:56 miff Exp $
+ */
+
+#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 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);
+    }
+}
+
+
+