On 24 February 2016 at 17:53, Ed Jaffe <[email protected]> wrote: >> Right. PSA is an MVS control block. > > Replacing FLC from the old, old days. > > AFAIK, prefixing did occur until multiprocessing came about...
On the S/360 model 65MP there was prefixing, but no prefix register for software to set. Instead it was done on the machine front panel! In those days there wasn't even an FLC macro or DSECT... Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
