On 8/16/2005 7:26 AM, Bo Xie wrote:
I "D IPLINFO" and the following is log:
--------------------------
RESPONSE=TESTMVS IEE254I 19.27.13 IPLINFO DISPLAY 650 SYSTEM IPLED AT 11.48.05 ON 08/02/2005 RELEASE z/OS 01.06.00 LICENSE = z/OS USED LOAD00 IN SYS1.IPLPARM ON 01C1 ARCHLVL = 2 MTLSHARE = N IEASYM LIST = DP IEASYS LIST = 00 (OP) IODF DEVICE 01C1 IPL DEVICE 01C0 VOLUME DMTRES --------------------------

The "ARCHLVL = 2" will make sure that the z/OS V1R6 supports 64 bit
mode (or working at 64-bit mode)?

As far as I know, z/OS V1R6 -requires- ARCHLVL 2 and will not IPL without it. Thus, there is no question for z/OS V1R6 that 64-bit processing is available.

        Walt

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