The IPL PSW provided by software is always 8 bytes. There is no provision for providing a 16 byte PSW.
Jim Mulder -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Joe Monk Sent: Sunday, January 8, 2023 4:27 AM To: [email protected] Subject: Question and CZAM and IPL When a z/arch machine has CZAM installed, is it possible to use a short PSW to IPL. Or, does the short PSW always become a long PSW before IPL, so it is better to use a long PSW to start with? In POPs, it says on page 3-75: "When the CZAM facility is installed, the IPL PSW has the short-PSW format, as shown in Figure 4-3 on page 4-8." But on page 4-8, it says: "Note: The term short PSW refers only to the eight-byte entity in storage. The actual PSW used by the CPU is the 16-byte register illustrated in Figure 4-2." Joe ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
