User`s guide
SEQ.FILE.DEMO AND REL.FILE.DEMO
These two
files
are included as programming examples
or
guidelines when writing
your own programs. They also illustrate the important technique
of
checking the error
channel after each access to the disk drive.
SD.BACKUP .xx
These three programs are entitled SD.BACKUP.C64, SD.BACKUP.Cl6, and
SD.BACKUP.PLUS4. Each, when lo!ided into its respective computer, allows you to
create an exact duplicate
of
a diskette by switching a blank diskette and the diskette to
be copied in and out
of
the drive at the appropriate times. Loading and running them
incorrectly may damage a diskette.
PRINT
.xx.UTIL
These three programs are actually entitled PRINT.64.UTIL,
PRINT.+4,
and
PRINT.Cl6.UTIL. They provide two functions: a printout
of
any Text-Mode screen
display, and a listing
of
the contents
of
all
scaler (non-array) variables
in
a Basic pro-
gram to screen
or
printer. Any CBM printer may
be
used for either function. Printing
of
reverse-video and graphics characters depends on the specific printer model used. These
programs can run from tape.
C64
BASIC
DEMO
+4
BASIC
DEMO
These programs offer a set
of
demo routines which can perform minimal system
testing on the computers. Routines are provided for testing the video and sound output,
keyboard and joy stick input,
and disk unit 110.
LOAD ADDRES!t
LOAD ADDRESS
is
a simple program that tells you where a program
was
origi-
nally located in memory.
Some programs can only run
in
the same locations from which
they were saved. Load such programs with LOAD"filename'',8,1.
UNSCRATCH
Allows you to restore a
file
that's been deleted (scratched) from a diskette as long as
the diskette hasn't been written to since the scratch
was
performed.
HEADER CHANGE
Allows you to rename a diskette without losing the data currently stored in the
diskette.
IMPORTANT
NOTE:
Your Test/Demo diskette
may
contain
additional
programs.
Commodore
may update the diskette
from time to time.
ALL
ADDITIONS,
DELETIONS,
OR
MODIFICATIONS
TO
THE
PRO-
GRAMS
LISTED
IN
THIS
APPENDIX
WILL
BE
NOTED
IN
THE
"HOW
TO
USE"
PROGRAMS
ON
YOUR
TEST/DEMO
DISKETTE.
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