How to configure Mtools to your system...

1) Things you'll need to know.

	The full path to the devices you want to use.

	The number of tracks, heads, and sectors supported by each device.

		5.25" 160k = 40 tracks, 1 head, and 8 sectors
		5.25" 180k = 40 tracks, 1 head, and 9 sectors
		5.25" 320k = 40 tracks, 2 heads, and 8 sectors
		5.25" 360k = 40 tracks, 2 heads, and 9 sectors
		5.25" 1.2m = 80 tracks, 2 heads, and 15 sectors
		3.5"  720k = 80 tracks, 2 heads, and 9 sectors
		3.5" 1.44m = 80 tracks, 2 heads, and 18 sectors

	If you choose to use a hard disk partition as one of your devices,
	then you may have to change the read/write permissions on that
	partition.

2) The Makefile and msdos.h files

	The following pre-processor variables are used in Mtools.  They
	should be set with "-Dvariable" in CFLAGS in the Makefile.

		BSD	for systems without System V style strings functions
			and System V style utime().

		ISC	default devices for ISC's Unix V.

		UNIXPC	default devices for AT&T Unix PC 7300/3B1

		SPARC	default devices for SunOS 4.1 on a SPARCstation

	There is a variable in msdos.h called SIG_TYPE which should be
	configured to the "base" return type of signal();

3) The devices "database" in devices.c

	WARNING:  The devices.c file, as distributed, has *NO* devices
	defined.  You *MUST* select from one of the examples or edit the
	devices database yourself.

	struct device {
		char drive;			/* the drive letter */
		char *name;			/* full path to device */
		long offset;			/* skip this many bytes */
		int fat_bits;			/* FAT encoding scheme */
		int mode;			/* any special open() flags */
		int (*gioctl) ();		/* gioctl() if needed */
		int tracks;			/* tracks */
		int heads;			/* heads */
		int sectors;			/* sectors */
	};

	drive	the drive letter (in uppercase) that you want to associate
		to this device.

	name	full path to the device.  Shell expansion is done on the
		name so things like $HOME/vpix/C: will work.

	offset	skip over a partition table.  Useful for msdos disk "images"
		such as those VP/ix uses.

	fat_bits The encoding scheme for the File Allocation Table.  Currently
		supports only 12 and 16 bit FATs.

	mode	any special open() mode flags (not normally used, except
		in the AT&T Unixpc 7300/3b1).

	gioctl	any special ioctl() calls required after opening the device
		(not normally used, except in the AT&T Unixpc 7300/3b1).

	tracks	the number of tracks supported by this device or zero if
		this type of sanity checking is not required.  Do NOT use
		this field for hard disks or disk "images".  Also used by
		gioctl(), if present, as a default starting place.

	heads	the number of heads supported by this device or zero if
		this type of sanity checking is not required.

	sectors	the number of sectors supported by this device or zero if
		this type of sanity checking is not required.


	If a device supports more than one disk capacity (1.2m and
	360k), then you should place the most frequently used capacity
	first.  You may get an error message from the device driver when
	the disk capacity doesn't match the device, but these can be
	safely ignored.

4)  Examples devices

	for Interactive 386ix 2.0.2 with:
		1.2m 5.25" as a: (supports 1.2m, 360k, and 320k)
		1.44m 3.5" as b: (supports 1.44m, 720k)
		hard disk partition as c:
		vpix disk image as d:
		user's vpix disk image as e:

		{'A', "/dev/rdsk/f0q15dt", 0L, 12, 0, (int (*)()) 0, 80, 2, 15},
		{'A', "/dev/rdsk/f0d9dt", 0L, 12, 0, (int (*)()) 0, 40, 2, 9},
		{'A', "/dev/rdsk/f0d8dt", 0L, 12, 0, (int (*)()) 0, 40, 2, 8},
		{'B', "/dev/rdsk/f13ht", 0L, 12, 0, (int (*)()) 0, 80, 2, 18},
		{'B', "/dev/rdsk/f13dt", 0L, 12, 0, (int (*)()) 0, 80, 2, 9},
		{'C', "/dev/rdsk/0p1", 0L, 16, 0, (int (*)()) 0, 0, 0, 0},
		{'D', "/usr/vpix/defaults/C:", 8704L, 12, 0, (int (*)()) 0, 0, 0, 0},
		{'E', "$HOME/vpix/C:", 8704L, 12, 0, (int (*)()) 0, 0, 0, 0},
		{'\0', (char *) NULL, 0L, 0, 0, (int (*)()) 0, 0, 0, 0}


	for AT&T Unixpc 7300/3b1 with:
		360k 5.25" as a: (supports 360k, and 320k, 180k, 160k)
		DOS73 disk image as c:

		{'A', "/dev/rfp020", 0L, 12, O_NDELAY, init_unixpc, 40, 2, 9},
		{'C', "/usr/bin/DOS/dvd000", 0L, 12, 0, (int (*)()) 0, 0, 0, 0}
		{'\0', (char *) NULL, 0L, 0, 0, (int (*)()) 0, 0, 0, 0}


	for Sun SparcStation with:
		1.44m 3.5" as a: (supports 1.44m and 720k)

		{'A', "/dev/rfd0c", 0L, 12, 0, (int (*)()) 0, 80, 2, 18},
		{'A', "/dev/rfd0c", 0L, 12, 0, (int (*)()) 0, 80, 2, 9},
		{'\0', (char *) NULL, 0L, 0, 0, (int (*)()) 0, 0, 0, 0}

		Note that the two devices are actually the same physical
		device, and that only the number of sectors are
		different.