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o remove -f from doscmd man page, as it is not implemented.

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o Remove init printf
o Don't set optind from return value for do_args.  getopt has already
  done this.
o Bump EMS memory from 1M to 10M (this really should be a command line
  option).
o Open /dev/null when requested to open emmxxxx0 to allow many programs
  checking to see if EMS is installed to find it.
o Route int67 to ems_entry to allow EMS to be used when DOS is emulated
  as well as when DOS is booted.  This may obviate the need for the
  driver doing anything at all in a really booted situation and won't
  hurt that case.

I can now run the DOS program I'm interested in running with enough
EMS memory that its "advanced" functions are enabled and working.
This commit is contained in:
Warner Losh 1998-07-16 23:54:26 +00:00
parent 47402bab91
commit 10f1d28ac1
4 changed files with 25 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
usr.bin/doscmd/dos.c
View File

@ -31,7 +31,7 @@
*
* BSDI int21.c,v 2.2 1996/04/08 19:32:51 bostic Exp
*
* $Id: dos.c,v 1.2 1998/07/01 19:56:13 imp Exp $
* $Id: dos.c,v 1.3 1998/07/02 05:12:52 imp Exp $
*/
#include "doscmd.h"
@ -277,6 +277,14 @@ translate_filename(u_char *dname, u_char *uname, int *drivep)
return (0);
}
/* XXX KLUDGE for EMS support w/o booting DOS */
/* Really need a better way to handle devices */
if (!strcasecmp(dname, "emmxxxx0")) {
*drivep = -1;
strcpy(uname, "/dev/null");
return (0);
}
error = dos_makepath(dname, newpath);
if (error)
return (error);
@ -2466,6 +2474,12 @@ int21(regcontext_t *REGS)
return;
}
static void
int67(regcontext_t *REGS)
{
ems_entry(REGS);
}
static u_char upcase_trampoline[] = {
0xf4, /* HLT */
0xcb, /* RETF */
@ -2493,6 +2507,10 @@ dos_init(void)
ivec[0x29] = vec;
register_callback(vec, int29, "int 29");
vec = insert_softint_trampoline();
ivec[0x67] = vec;
register_callback(vec, int67, "int 67 (EMS)");
vec = insert_null_trampoline();
ivec[0x28] = vec; /* dos idle */
ivec[0x2b] = vec; /* reserved */
@ -2505,4 +2523,6 @@ dos_init(void)
/* build fastlookup index into the monster table of interrupts */
intfunc_init(int21_table, int21_fastlookup);
ems_init();
}

8
usr.bin/doscmd/doscmd.1
View File

@ -137,14 +137,6 @@ Enable debugging of the exec routines.
.\"
.\"
.\"
.It Fl f
Use
.Xr fork 2
for spawned processes rather than running them in the
current memory space.
.\"
.\"
.\"
.It Fl H
Enable tracing of half implemented calls.
.\"

5
usr.bin/doscmd/doscmd.c
View File

@ -29,7 +29,7 @@
*
* BSDI doscmd.c,v 2.3 1996/04/08 19:32:30 bostic Exp
*
* $Id: doscmd.c,v 1.5 1998/07/01 19:56:14 imp Exp $
* $Id: doscmd.c,v 1.6 1998/07/02 05:23:54 imp Exp $
*/
#include <sys/types.h>
@ -129,7 +129,7 @@ main(int argc, char **argv)
debug_set(0); /* debug any D_TRAPS without intnum */
/* perform option argument processing */
optind = do_args(argc, argv);
do_args(argc, argv);
argc -= optind;
argv += optind;
@ -270,7 +270,6 @@ main(int argc, char **argv)
vm86.sub_op = VM86_INIT;
vm86.sub_args = (char *)&kargs;
i = sysarch(I386_VM86, &vm86);
printf("Init: %d\n", i);
sigreturn(&sc);
debug(D_ALWAYS,"sigreturn failed : %s\n", strerror(errno));

4
usr.bin/doscmd/ems.h
View File

@ -25,7 +25,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id$
* $Id: ems.h,v 1.1 1997/09/30 22:03:45 jlemon Exp $
*/
#ifndef EMS_H
@ -36,7 +36,7 @@
/* Global definitions, some of them will be configurable in the future */
#define EMS_NUM_HANDLES 256 /* Includes OS handle 0 */
#define EMS_MAXSIZE 1024 /* In kbytes */
#define EMS_MAXSIZE 10240 /* In kbytes */
#define EMS_MAX_PHYS 4 /* Frame is 64kB */
#define EMS_FRAME_ADDR 0xe0000
#define EMS_VERSION 0x40 /* Version 4.0 */