TOPS-10 Monitor Calls Manual Volume 2 AA-K039D ... - Trailing-Edge

OPEN [OPCODE 050]
22.111 OPEN [OPCODE 050]
FUNCTION
Initializes a channel for I/O
extended I/O channel.
operation.
Use
FILOP. to assign an
CALLING SEQUENCE
OPEN channo,addr
error return
skip return
addr:
argument list
In the calling sequence, the program supplies the following variables:
o
o
channo is the number of a channel.
addr is the address of the argument list.
The argument list is described in the following subsections.
22.111.1 ARGUMENT WORD 0 (.OPMOD)
Contains flags and status bits. The I/O status bits are a set of 18
bits (right halfword) that reflect the current state of a file
transmission. They are initially set by your program with the OPEN
monitor call. Thereafter, the monitor sets the bits, but your program
can test and reset them using any of several monitor calls.
Bits
o
Symbol
UU.PHS
Meaning
Only physical device names will be used in the
search. All logical names defined by the job will
be ignored.
1
UU.DEL
Disables error logging; only user-mode
programs may set this bit.
diagnostic
1
2
2
2
UU.FSP
UU.DER
UU.BJP
UU.DMR
Specifies a full SCNSER PTY (pseudo-terminal).
That is, all terminal characteristics that are
normally ignored for PTYs will be set and
enforced. Refer to Chapter 15.
Disables error retry; only user-mode diagnostic
programs may set this bit.
If the given device is a PTY, and if the calling
program is privileged, this bit specifies that
jobs logging on this PTY are to be treated as
batch jobs.
Disables message re-assembly. This bit is used in
ANF-I0 intertask communication to allow the
receipt of messages that do not have the EOM bit
set. This flag should be set if UU.AIO is set for
TSK devices. (Refer to Chapter 5.)
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