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CONVERT.DOC
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1985-11-20
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4KB
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128 lines
February 20,1992
Format Converter 1.0
By Lonnie Dwayne Webb
Format Converter is written in GFA-BASIC 3.5 to convert the
boot record of old TOS diskettes to IBM standards. It also
permits the user to write the Neodesk boot record. Since I
don't have NeoDesk (yet!) I can only make small observations
about disks that already have that format. Needless to say,
this option is not considered finished--USE AT YOUR OWN RISK!
Atari TOS Format
In case you haven't found out already, old TOS machines
like mine will not format IBM disks without some help. The
first sector(boot sector, or boot record as Norton puts it) is
written differently. I assume the difference is this: IBM puts
a lot of information on the boot record concerning the DOS
version number, system files, default error messages, and the
boot program.
For the most part Atari disks don't need any of that
information. I suppose that's the reason for the difference.
The first two words of the boot sector(this is all ala Webb)are
identifiers. I really don't know exactly what they identify, so
I'll just stop speculating now.
I haven't written a routine to write Atari boot records for
two reasons. One, there's no reason to. Atari reads all IBM
formats I know of. Two, I just don't have enough information at
my disposal to write a complete routine for every Atari format,
and I know there have been changes.
By the way, the converter will not alter hard drives. I
can't afford an Atari drive to make the comparison, besides I
can't think of a real need for it right now.
IBM Conversion
When run, CONVERT.PRG reads DISK A by default. Change the
drive with the File menu. A tick will appear next to the disk
chosen.
Choose either MS-DOS or NeoDesk to do the conversion. You
get to choose from the three most common identifiers:
28: This is the byte that Norton's Safe Format writes.
I have also found it on DOS disks with DOS 3.3 and
earlier.
34: This byte is on all my DOS 4 5.25 disks.
3C: I get this byte by formatting under DOS 5.0.
When you have made you selections, the first two words are
displayed. You can see off hand if they need converting.
Sector 0 is read in, and should you click the button, the
first two words are changed accordingly.
I credit the functionality of this program to a post on
Netnews. Someone posted the information I used, and I thank
them. I believe it was in the welcome message II.
Autoboot Programs
I have tested the converter on my autoboot programs and
haven't had any trouble. I don't think it should, either.
HOWEVER, it's always a good idea to make a backup first. And
test on the BACKUP.
Fixing Disks
As you may have heard, the best programs for dealing with
bad disks are on other computers. With this conversion, your
data is a big step closer to being secure and portable.
Plus you don't have to format on another machine anymore!
Shareware
This program is shareware and may be freely distributed in
its original form. If you use, or plan to use, this program,
please send $15(or whatever you think it's worth)to:
Lonnie Dwayne Webb
16007 Dutch Mills N.
Lincoln, AR 72744
I will continue to support this and all software I write.
Those who register their copy of CONVERT will receive upgrades
and the next program I write free. Hopefully that will be a
good sector editor with a decent routine for fixing disks.
Every effort has been made to insure that this program is
bug free. In testing, no problems have arisen, HOWEVER...
DISCLAIMER
No warranties either implied, expressed, or written have
been made concerning this program. The author assumes no
responsibility concerning quality or long reaching effects of
the program.
Please send any problems, bugs, or comments to the above
address or by Internet to: lwebb@uafhp.uark.edu.
Good Luck.