> - The first word of the TCB proper, ie. +0 is TCBRBP, but this > offset is "fixed by architecture"! > > Back in the early '70s, when I first noticed the IKJTCB macro, I > speculated that TSO was the first component to "macroize" the DSECT, > and hence gave it the IKJ prefix. I never found out the truth but > it is possible that, up until that time, offsets fixed by > architecture were hard-coded rather than named.
"Fixed by architecture" means that some part of the machine architecture depended on it. I would guess that TCBRBP and RBOPSW were used by the SVC Assist (which became defunct long ago). Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
