>No. System z still IPLs in ESA/390 mode. A SIGP instruction must be explicitly >issued by the operating system to switch into z/Architecture mode.
Then why does SAPR say minimum of z/OS 1.4 with PTFs? Also, while bi-modal exists, it stops at 1.5. Both 1.4 & 1.5 go out of support on APR01. - Too busy driving to stop for gas! ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html

