z/OS 1.5 (not 1.4) was the last release that could also run in ESA (31-bit) mode. If it's z/OS 1.6 or higher, you know for sure you're running in z/Architecture (64-bit) mode.
-------------------------------------------------------------------------------------------------------- Timothy Sipples Resident Enterprise Architect (Based in Singapore) E-Mail: [email protected] ---------------------------------------------------------------------- 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
