Commodore 1541-II - Initializing

files, with loss of all their contents when other files are added. Unless specifically
instructed otherwise, never collect a diskette containing direct access files. (Note: these
are not the same as the relative files described in Chapter 6. Collect may be used on
relative files without difficulty.)
FORMAT FOR THE COLLECT COMMAND
COLLECT Ddrive #,Udevice #
where "D" is the drive number (always 0 on the 1541,) and "U" the device number. As
usual, if omitted they default to drive 0 and device 8 respectively.
EXAMPLE:
COLLECT DO
INITIALIZING
One command that should not often be needed on the 1541, but is still of occasional
value is Initialize. On the 1541, and nearly all other Commodore drives, this function is
performed automatically, whenever a new diskette is inserted. (The optical' write-protect
switch is used to sense when a diskette is changed. >'
The result of an Initialize, whether forced by a command, or done automatically by
the disk, is a re-reading of the current diskette's BAM (Block Availability Map) into a
disk buffer. This information must, of course, always be correct in order for the disk to
store new files properly. However, since the chore is handled automatically, the only time
you'd need to use the command is if something happened to make the information in the
drive buffers unreliable. Even so, you may use the command for reassurance, as often as
you like, so long as you close all your files except for the command channel first.
FORMAT FOR THE INITIALIZE COMMAND EXAMPLE:
PRINT#15,ttINITIALIZEdrive #" PRINT# 15,"INITIALIZE 0"
or it may be abbreviated to
PKINT#15,''Idrive #" PRINT#15,t<I0"
where the command channel is assumed to be opened by file 15, and "drive #" is 0 on
the 1541.
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