NIB2D13
=======

"nib2d13" and its companion "d132nib" are fairly simple-minded utilities for
converting between a Nibble (.nib) Image of an Apple II 13-sector disk and a
Disk (.d13) Image. Please note that these utilities are intended *only* for
13-sector disks (also known as "DOS 3.2 format" disks) as used during the
earliest period of Apple II history, not for the much more common 16-sector
disks introduced in mid-1980.

Both utilities read from standard input and write to standard output. Thus
you'll have to use indirection symbols "<" and ">" to denote input and output
files.

Usage examples:

nib2d13 < 13sec.nib > 13sec.d13

d132nib < 13sec.d13 > 13sec.nib

If everything works as intended, the utilities print no message. If you get
complaints, the target image is usually invalid and should be deleted.

WARNING: Don't confuse ">" with "<" and always write protect your source image
files; otherwise they might get overwritten accidentally.

While d132nib should work on any valid .d13 image, nib2d13 will work only if
the .nib image does indeed contain data for a 13-sector disk; most .nib images
floating around on the net do not, and are thus not convertable to .d13 in any
meaningful way.

Linux-i386 executables are included, as well as MS-DOS executables which work
fine under both DOS and MS Windows (all versions). You can use the shell
script "make-nib2d13.sh" to rebuild the Linux executables if needed.

Some code was taken from YAE 0.6 ("Yet another Apple Emulator") which doesn't
include any kind of identifiable license terms; I took the liberty of
including it here as I doubt very much that the authors would mind. Thanks to
Doug Kwan and to Warren! This concerns the files "yae.h", "hardware.h", and
the original version of "gcr.c"; the 13-sector modifications in "gcr.c" were
done by me.

I can be reached at "ticmanis@gmx.de" for the forseeable future.

-- 
Linards Ticmanis