User`s guide

C:\WINDOWS>cd\
C:\>cd nulib
o- Enter the xd command to create the disk image from modem1.sdk:
C:\nulib>nulib xd modem1.sdk
You should get a message saying the 'NEW DISK' image is being extracted ending
with "...done".
o- Exit the MS-DOS window-- e.g. click on the "X" in the corner.
o- Open the C:\nulib folder. Probably, your new disk image will be named
"new.dis". Rename the new file to "modem1.po". It should show up with a size of
140k in the usual Windows listing. (If it shows size 0, go to "View" for the
window and click "Refresh".)
If the new modem1.po has some size other than 140k-- like size is shown as 75k,
etc.-- it means that modem1.sdk was probably created by GS-ShrinkIt and can not
be converted to a disk image using NuLib. (You might as well scrap the bad
modem1.po .)
Most likely, though, the conversion will work and modem1.po will be a good disk
image.
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014- How can I convert a .po image to/from a .dsk or .do
image?
Most emulator programs have no problem using .po, .do, or .dsk disk images.
So, the usual reason for wishing to change ordering is to go from .po (ProDOS
order) to .dsk (typically, DOS 3.3 order) to permit transferring the image to
your Apple II via ADT. In a few cases, it may be useful to go from DOS 3.3 order
to ProDOS order, too.
Since a disk copy done on an emulator (like AppleWin) adjusts ordering to
match the target, doing a disk copy from, for example, a .po image to a .dsk
image (in DOS 3.3 order) is a simple way to do a conversion*. A good emulator
choice for Windows users is AppleWin. A good disk copier program is Disk
Muncher-- it is included on the TNILUTIL.DSK available from Ground and GSWV.
An easy way to check ordering of a bootable .po or .do disk image is to
boot it under AppleWin. If it boots correctly, the ordering is as claimed-- .do
= DOS 3.3 order and .po = ProDOS order. For a bootable .dsk image, you can
change the suffix to ".do" or ".po" and boot it to check that it is really in
the order you expect.
*Note: AppleWin, evidently, checks the ordering of a .dsk image used as a target
for copying. It does not check actual ordering of .po or .do images. So, for
example, if the target image has the ".po" suffix, the copy to the image will be
in ProDOS order. Some emulators may work differently.