DRL PDIO (octal 24) - do I/O on a system file.
Usage:
drl pdio
(seek command)
zero L(fileid),L(dcw1)
(read/write command)
zero L(fileid),L(dcw2)
zero L(stat),0
Where:
- fileid
- contains the one-word file code in BCI (two characters,
right-justified with leading zeroes).
- dcw1, dcw2, stat
- are the same as for DRL DIO (see "expl drl dio").
Description:
Files allocated directly to the TSS Executive appear only
in an executive table, and only privileged subsystems can do I/O on them.
They do this using DRL PDIO.
The system files that may be accessed with DRL PDIO are
- #D
Deferred processing queue file.
- #P
The TSS primary file, on which subsystem programs are kept.
- #Q
The TSS secondary program file, on which subsystem programs are kept.
- #R
TSS dump file.
- SS
System Scheduler file (SSFILE).
- #S, #T, #U, #V
TSS swap files.
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