
This is the modernized version of the floppy device driver.
It lock now the drive with Dlock.


Frank Naumann
<fnaumann@cs.uni-magdeburg.de>

Magdeburg, 06.05.1999

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Here is the original readme file from dave Gymer
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This is Dave Gymer's raw MiNT floppy device hacked up to work as a .XDD
driver and to handle multiple devices.

To build it you need the PureC compiler v1.1, I haven't tested with an
another compiler... Send me a note if you succeed in compiling with an other
C compiler!

The compiled devices got fd0 (ex-ps0.. fd0 seems more logical to me), fh0
for HD 1.44meg and fx0, a fat HD format (1.6meg = 20 sectors/track).
If you wish to add others devices (other drive, different density..), you
just have to put their description in the array "drivers", and recompile!
Then you got a ready-to-work nice XDD driver! 

How to add a device in "driver[]":
{device_name, drive, tracks/side, sides, sectors/track, bytes/sector}

device_name:   ex: "fd0", "fh0", "ps0"...
               Note that all the devices will be in /dev
drive:         0 for drive A:, 1 for drive B: (no harddisk!)
tracks/side:   80 is the standard
sides:         1 (single-sided) or 2 (double-sided)
sectors/track: 9 is for DD MS-DOS disks, 18 for HD MS-DOS disks, 36 for ED disks.
               Of course don't surestimate your drive... If you put a greater
               value than standard it might be unreliable and slower!
bytes/sector:  512 is the standard

adviced values for sectors/track (values between braces are standard values)
DD 3'5 : [9] 10 11
HD 5'25: [15] 16 17
HD 3'25: [18] 19 20 21 22
ED     : [36] 37 38 39 40
beware of higher values!

-- Stephane Boisson (Nucleus)
boisso_s@epita.fr

Here is the original readme file from dave Gymer
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ps0 - a simple raw floppy device driver
Written by Dave Gymer and placed in the public domain.

Basically, what this program does is to install a character special
device called /dev/ps0 (the name is adjustable) which can be manipulated
almost like a normal file, but whose contents reflect the contents of the
floppy disk in drive A: (also adjustable).

There are a few things you can't do with /dev/ps0 that you can with a real
file:
	- delete it (well, you can, but then the device driver is lost and
	must be reloaded)
	- alter it's length (this is fixed at the length of the disk; attempts
	to seek further will silently fail)
	- stat it (again, you can, but you don't get anything useful out)

By default, it read double sided, 9 sector/track, 80 track disks in drive A:,
but you can alter all these things in the source and recompile.

I wrote this program after buying a 386 PC to run Linux on; the easiest way
to transfer files is via /dev/ps0 on the PC, but there was no MiNT equivalent.
At first I used a program called STraw (ST rawrite) which I knocked up in a
night, but I stupidly went and deleted the source, so I wrote this instead.
Good, huh?

You should add a line to your mint.cnf file to install it, along the lines of
	exec c:\mintboot\ps0.tos

Quick hint: if you use the GNU fileutils under MiNT, do _not_ use cp to
write files to /dev/ps0, cos it does them a byte at a time! Instead, use
`cat file >/dev/ps0'. Maybe one day Eric Smith will add proper block-special
devices to MiNT. But what do I care? :-) I run Eunuchs! 8^}

-- Dave Gymer
dpg@Cs.Nott.AC.UK
