For our site and the modules which we write ourselves (no third party software), it's zero percent. We started migration to 31-bit in the mid 80s and - like PL/1 - dropped support for 24-bit ASSEMBLER modules at some certain point in time in the last five years. We only support it for some third party software which we need absolutely and which our management forces us to use. But this count's for less than 1 %, given the number of modules or CPU cycles.
Regards, Bernd Am 19.04.2013 18:31, schrieb Ed Jaffe:
I saw a discussionon IBM-MAINrecently about how many MVS TCBs was "too many" MVS TCBs in an address space. System control blocks like TCB, located in LSQA below 16MB, will likely never be moved above 16MB since it's still possible for a 24-bit program to load PSATOLD and reference GUPI fields in the TCB. This got me wondering about just how much AMODE(24) code is still out there--not only for z/OS but for other operating systems as well. Any ideas? Are most programs still 24-bit? Half of them? Ten percent or less? -- Edward E Jaffe Phoenix Software International, Inc 831 Parkview Drive North El Segundo, CA 90245 http://www.phoenixsoftware.com/
