Author: UmeySan
Posted: Tue Jan 31, 2017 3:36 pm (GMT 5.5)
@ Suja.Sai
With the GETMAIN instruction you obtain a contiguous block of virtual storage. So you requests a certain amount of storage space.
With the FREEMAIN command you release this storage.
See also STORAGE OPTAIN/RELEASE instructions in the manuals.
STORAGE OBTAIN/RELEASE -> uses PC(Program Call)
GETMAIN/FREEMAIN -> uses SVC
It was said that a PC instruction would be much more efficient than a SVC interruption.
Regards, UmeySan
_________________
Regards, UmeySan
Posted: Tue Jan 31, 2017 3:36 pm (GMT 5.5)
@ Suja.Sai
With the GETMAIN instruction you obtain a contiguous block of virtual storage. So you requests a certain amount of storage space.
With the FREEMAIN command you release this storage.
See also STORAGE OPTAIN/RELEASE instructions in the manuals.
STORAGE OBTAIN/RELEASE -> uses PC(Program Call)
GETMAIN/FREEMAIN -> uses SVC
It was said that a PC instruction would be much more efficient than a SVC interruption.
Regards, UmeySan
_________________
Regards, UmeySan