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

GETSEG [CALLI 40]
The right half of .JBHRL is set to the new
legal user address in the high segment .
highest
. JBSA and .JBREN are cleared if they contain addresses
in the new high segment. This removes the program's
start address, so that an error will occur on a START
or REENTER command.
Channel 0 is released by
channels are not released.
the GETSEG call. Other
Refer to the RELEAS UUO.
A GETSEG call made from the current program's high segment can succeed
only if the start of the new high segment coincides with the skip
return for the call. Program execution returns to the user program at
the PC corresponding to the skip return from the GETSEG UUO in the
previous segment. It is the user's responsibility to ensure that this
PC contains instructions he wishes to be executed.
ERROR RETURN
See Section 11.14 for a list of GETSEG errors.
If the segment already exists in the user's address space, error code
70 is returned in the ac.
RELATED CALLS
o
o
o
o
MERGE.
RELEAS
RUN
SEGOP.
COMMON PROGRAMMING ERRORS
o
o
o
Forgetting to save the acs over the GETSEG.
Forgetting that channel 0 is destroyed.
Forgetting that a GETSEG from a high .segment returns control
to the PC in the new high segment.
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