I never ran a S/360-32bit system, but different users logged on to TSS in different modes. An IPL of the entire computer complex every time that every user logged on was probably not done. i.e. It was a bi-modal architecture. An LPSW or other instruction would have made more sense.
I also believe, but have no experience, that memory from 2GB to 4GB-1 was avoided because there were no logical versions of BXH and BXLE and some programmers like to index. - - - old post - - - Subject: Re: GETMAIN LOC=32 From: Joe Monk <[email protected]> Date: Fri, 11 May 2018 11:57:19 -0500 "How did that work? Did a high bit in BASR cause AM32 to be activated?" No ... the 360-67 had to be IPL'd in extended PSW mode to activate AM32. Otherwise it was a BC mode PSW machine... Joe ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
