DRL SWITCH (octal 53) - switch temp file names.

Usage:

drl    switch
zero   L(fileid1),L(fileid2)
(error return)
(successful return)

Where:

fileid1 and fileid2: each contain two-word ASCII file names.

Description:

DRL SWITCH is used to switch the names assigned to the two temporary files specified by "fileid1" and "fileid2". Note that this effectively accomplishes an exchange of the contents of the two files.

On an error return, the A-register will contain a zero value if either of the files is non-existent and a non-zero value if either file is not temporary.