GDSX (Extended General Device Support) Manual

Overview of GDSX

Extended General Device Support (GDSX) Manual—529931-001

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Starting SU/Line With accessname NONE

When the I/O operation(s) completes, the data is picked up by the LINE^HANDLER

task, sent through TSCODE to the DEVICE^HANDLER task, and then passed back to

the requester.

Starting SU/Line With accessname NONE

This feature provides support for preconfigured SUs and LINEs without the need for an

associated file as accessname. TSCODE will not open any device for a task configured

with accessname NONE. The Device^Handler/Line^Handler procedure gets called with

term^file^num/line^file^num set to -1.

The example below shows two SUs configured through SCF under the GDSX process

$gds:

-> add su $gds.#t1, accessname NONE

-> add su $gds.#t2, accessname $LT1

-> start su $gds.#t1

-> start su $gds.#t2

SU T1 has no associated IOP and is configured with accessname NONE (instead of

using a dummy $NULL process). SU T2 communicates through $gds to $LT1.

Figure 1-8. GDSX With a LINE^HANDLER

$GDS

D^H Task

TSCODE

IN^QUEUE^FI

LE^NUM

Requester

$RECEIVE

VST008.vsd

D^H Task

L^H Task

LINE^FILE^NUM

IOP

Requester