DRL FILSP (octal 13) - space a linked file.

Usage:

drl    filsp
zero   l(fileid),l(n)
zero   l(stat),0

Where:

fileid

is a two-word vector containing the file name in lower case ASCII.

n

contains the number of 320-word blocks to be spaced; a negative value of "n" denotes backspacing.

stat

is a two-word long status return location.

Description:

DRL FILSP spaces a linked file forward or backward by "n" 320-word blocks, depending on whether "n" is positive or negative. Loadpoint and end-of-file status indications are returned. An undefined-file condition is returned as Device Busy status (major status 01).

If a request is made to space a random file, the requesting system is aborted and an error message is sent to the terminal.