On Thu, 27 Oct 2011 18:38:33 -0500, John McKown wrote: >As I recall the x'81' in the undefined area was a mod by SLAC to the >Linkage Editor. I remember it well. Mainly because IBM had a bunch of DS > Hmmm. Would that tend to bloat load modules, or does the load module definition have some sort of RLE compression capability?
>instructions in the MVS CVT. When I did a sysgen one time the system >died because the "default" vol of 0x00 in the DS areas were now x'81'. >The NIP logic apparently had a compare against 0 to see if some field >was initialized and bypassed further initialization if non-zero. When >the slack bytes were x'81', MVS died during NIP. > Old stuff. Nowadays there's the diagnostic Dirty GETMAIN facility to wring out such oversights. But is Dirty GETMAIN functional in NIP? I recall a computer, perhaps pre-360; perhaps non-IBM whose operator's console had a deeply recessed button that set all central memory to 0. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
