Commodore 128 Programmer's Reference Manual page 57

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BASIC BUILDING BLOCKS AND BASIC 7.0 ENCYCLOPEDIA 47
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HEADER
Format a diskette
HEADER "diskname" [91 i.d.] [,Ddrive number]
^ [<ON|,>Udevice number]
} | Before a new disk can be used for the first time, it must be formatted with the HEADER
command. The HEADER command can also be used to erase a previously formatted
disk, which can then be reused.
j | When you enter a HEADER command in direct mode, the prompt ARE YOU
• SURE? appears. In program mode, the prompt does not appear.
The HEADER command is analogous to the BASIC 2.0 command:
j" OPEN l,8,15,"N0:diskname,i.d."
EXAMPLES:
I HEADER "MYDISK",I23, DO This headers "MYDISK" using i.d. 23
on drive 0, (default) device number 8.
p HEADER "RECS", 145, Dl ON U9 This headers "RECS" using i.d. 45, on
j drive 1, device number 9.
HEADER "C128 PROGRAMS", DO This is a quick header on drive 0, device
" number 8, assuming the disk in the drive
j j was already formatted. The old i.d. is
used.
H HEADER (A$),I76,D0,U9 This example headers the diskette with
j | the name specified by the variable A$,
and the i.d. 76 on drive 0, device num-
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HELP
j Highlight the line where the error occurred
HELP
p The HELP command is used after an error has been reported in a program. When HELP
j is typed in 40-column format, the line where the error occurs is listed, with the portion
containing the error displayed in reverse field. In 80-column format, the portion of the
p line where the error occurs is underlined.
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IF / THEN / ELSE
j Evaluate a conditional expression and execute portions of a program depending on the
' outcome of the expression