GDSX (Extended General Device Support) Manual

Design and Development

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

2-59

EXTSUSIZE

This static parameter specifies the number of words added to the device control block

for application-specific purposes (see the dcb^template in the ULHDECSE file listed in

Appendix C).

If additional space is not required in the DCB, EXTSUSIZE should be set to 0 so that

unneeded space is not allocated in the DCB pool (see the description of MAXTERMS

on page 2-69 for an explanation of how the size of the pool is calculated). If the

sample GDSX object file called OGDS is run as a line handler, MAXLINES must be

greater than 0 and EXTSUSIZE must be equal to 8.

Changing the value of EXTSUSIZE after the GDSX process is initialized has no effect

on the structure of a DCB or the allocation of the DCB pool.

IOCBWAITTIME

This dynamic parameter specifies the maximum time that TSCODE should wait for an

IOCB to become available during a call to ALLOCATEIOCB that does not specify a

timeout. (See ALLOCATEIOCB on page 8-9) If a task waits longer than

IOCBWAITTIME ticks, it will be suspended with a fault.

IOCB allocation faults may be displayed by issuing an SCF STATS command.

LOGSTATUS

This dynamic parameter indicates whether event messages are to be sent to the EMS

$0 collector. If the parameter value is nonzero, all status, events, faults, and errors are

sent to the $0 collector. If the parameter value is zero, EMS messages are not

generated by TSCODE.

LOOPTIME

This dynamic parameter indicates the maximum processor time that any task is

allowed to execute before relinquishing control. Unless this parameter is set to zero, in

which case TSCODE makes no attempt to monitor looping tasks, if a task executes for

Internal DEFINE Name CONFIG^PARAMS Name Default Value Range

termdata term^data 8 words 0–64 words

Internal DEFINE Name CONFIG^PARAMS Name Default Value Range

iocbwait iocb^wait^time 1000 ticks 0–6000 ticks

Internal DEFINE Name CONFIG^PARAMS Name Default Value Range

log^enabled log^status 1 (enabled) 0–1