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dos part 2
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Commodore VIC 1541 Tutorial Part 2
========= === ==== ======== ==== =
note: (part 1 was on LOADSTAR # 1)
by: Joel Ellis Rea
Last month we discussed the ances-
try of the 1541 disk drive. If you
missed it, check out the back issues
offer.
This month we will discuss the bas-
ics of how the disk holds information,
and how to do the four most important
operations on a disk:
1. Format a NEW disk so that
information can be organized
on the surface of the disk.
2. SAVE a program onto the disk.
3. LOAD a program from the disk.
4. Make a BACKUP of the infor-
mation from one disk to an-
other in case Murphy visits!
We will not discuss the why's and
wherefore's of the particular commands
and syntaxes and such this time. We
will just show the commands.
When you got your disk drive, you
more than likely received a disk en-
titled "1541 TEST/DEMO". If you have
no such disk, go out and buy a copy of
the "1541 Bonus Pack" disk from a lo-
cal dealer. It is inexpensive and
very useful!
With the "1541 TEST/DEMO" disk in
your drive, type:
LOAD "C-64 WEDGE",8: (at this point
hold down the SHIFT key and press
the RUN/STOP key. DO NOT hit RE-
TURN!)
This will load and run DOS Manager
Version 5.1, also known as the DOS
Support Program or the DOS Wedge. You
should load the DOS Manager (herafter
called the Manager) every time you
turn on your computer, except when you
are just going to run a pre-packaged
program like Loadstar.
If you have the Disk Bonus Pack in-
stead of the 1541 TEST/DEMO disk, you
will have to insert it instead and
type:
LOAD " DOS 5.1",8,1
Wait for the drive to stop and the
word "READY." to appear, then type:
SYS 52224
That will also activate the Manager
for you.
The Manager makes it easier to use
the disk drive. You can use the drive
without it, but it is much more tedi-
ous. We will not discuss non-Manager
commands this time.
Before you can use a new, blank
disk, the disk must first be prepared
for use by a 1541 drive. This prepar-
ation is called "formatting". This
needs to be done only once per disk
unless the disk is physically erased,
partially or completely. You should
format all of your blank disks as soon
as you get them home!
To format a disk, type:
@NEW0:disk name,id
The "disk name" can be any name of
your choice up to 16 characters long.
It cannot contain a comma, colon, as-
terisk, question mark or quote. The
"id" is a Disk Identifier. It must be
exactly two characters long, with the
same restrictions on legal characters
as the "disk name". WARNING! The
disk "id" MUST be DIFFERENT on EVERY
DISK YOU OWN!!! Some examples:
@NEW0:JUNQUE DISQUE,JD
@NEW0:MY LETTERS #1,L1
@NEW0:ACCOUNTING 5,A5
Some examples of illegal format com-
mands:
@NEW0MY FAVORITE,MF
(No colon)
@NEW0:"GOOFY" STUFF,GS
(Quotes in disk name)
@NEW0:LOADSTAR PROGRAMS,LP
(Disk name too long)
@NEW0:DISK #1,1
(Id too short)
@NEW0:DATA DISK
(No id. This is legal, but the
disk will not be formatted --
just erased and renamed. Use
this to re-use an already for-
matted disk that has nothing
on it you want to keep.)
-------------<continued>--------------
(x to exit)