Texas Instruments 990 User Manual page 118

Applications Programming
4.6.2.3 WKUP4D Subroutine Call.
For requests of activation services, subroutine WKUP4D builds an
SVC block and executes an SVC with the I/O opcode specified by
the calling program. A call to subroutine WKUP4D places the
network ID of the calling program into the activation services
list or removes the calling program~s network ID from that list.
A program that has requested activation services is activated
when an input data addressed to it is found in the communications
input buffers.
The syntax for the call statement is as follows:
FORTRAN:
CALL WKUP4D (<option>,<st code»
Pascal:
WKUP4D (<option>, <st code»
where:
<option> contains the option code. Valid option codes
used to make requests of activation services are
as follows:
Code Function
04 Request is made for the applications
program to be activated from an
indefinite suspension when input data
from any station is addressed to it.
Applications programs that request
this service may be installed on any
program file in the DX10 system.
05 Request is made for the applications
program to be activated from a time
delay when input data from any
sta tion is addressed to it.
Applications programs that request
this service may be installed on any
program file in the DXlO system.
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