> Next its test for an ASCB that is assigned. > > TM 0(R11),ASVTAVAL VALID ASCB Available ? > > BO RUNLOP1 NO, CHECK NEXT ASVT ENTRY
I wouldn't separate the test for valid with picking up the ASCB address as the ASVT slot might change between my ASVT references. I'd load the word from the ASVT slot and then test the high bit in the register (LTR or ICM). I'm assuming you don't hold the required locks to serialize ASVT updates (unlike deep in the zOS dispatcher etc..) ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
