MarketProgram status word
Company Profile

Program status word

The program status word (PSW) is a register that performs the function of a status register and program counter, and sometimes more. The term is also applied to a copy of the PSW in storage. This article only discusses the PSW in the IBM System/360 and its successors, and follows the IBM convention of numbering bits starting with 0 as the leftmost bit.

Format
S/360 On all but 360/20, the PSW has the following formats. S/360 Extended PSW format only applies to the 360/67 with bit 8 of control register 6 set. S/370 S/370 Extended Architecture (S/370-XA) Enterprise Systems Architecture (ESA) z/Architecture ==Notes==
tickerdossier.comtickerdossier.substack.com