1 operating system support, 2 z/os software support, 1 compatibility support for z/os – IBM 990 User Manual
Page 146
134
IBM
^
zSeries 990 Technical Guide
6.1 Operating system support
There are many significant changes in the z990 architecture and hardware features when
compared to the z900 processor. Extensive software support has been made available to
existing OS levels via compatibility and Exploitation Support to accommodate these changes
in the OS/390, z/OS, z/VSE, VSE/ESA, TPF, z/VM and Linux on zSeries operating systems.
Table 6-1 summarizes supported software on the z990.
Table 6-1 z990 software support summary
6.2 z/OS software support
z/OS software support has been designed at two levels:
Compatibility Support
and
Exploitation Support
.
6.2.1 Compatibility Support for z/OS
Compatibility Support for z/OS software is delivered in several ways, depending on the
version of release of z/OS.
Operating system
ESA/390
(31-bit)
z/Arch.
(64-bit)
Compatibility
Exploitation
OS/390® Version 2 Release 10
Yes
Yes
Yes
No
z/OS Version 1 Release 2
No
a
a. 31-bit mode is only available as part of the z/OS Bimodal Migration Accommodation software
program. The program is intended to provide fallback support to 31-bit mode in the event that
it is required during migration to z/OS in z/Architecture mode (64-bit).
Yes
Yes
No
z/OS Version 1 Release 3
No
a
Yes
Yes
No
z/OS Version 1 Release 4
No
a
Yes
Yes
Yes
z/OS Version 1 Release 5 and 6
b
b. z/OS 1.6 is planned to be available in September 2004.
No
Yes
Included
Included
Linux for S/390
Yes
No
Yes
Yes
Linux® on zSeries
No
Yes
Yes
Yes
z/VM Version 3 Release 1
Yes
Yes
Yes
No
z/VM™ Version 4 Release 3
Yes
Yes
Yes
No
z/VM Version 4 Release 4
Yes
Yes
Included
Included
z/VM Version 5 Release 1
No
Yes
Included
Included
VSE/ESA™ Version 2
Release 6 and 7
Yes
No
Yes
Yes
z/VSE Version 3 Release 1
c
c. The z/VSE operating system can execute in 31-bit mode only. It does not implement z/Archi-
tecture, and specifically does not implement 64-bit mode capabilities. The z/VSE operating sys-
tem is designed to exploit select features of IBM
^
zSeries hardware.
Yes
No
Included
Included
TPF Version 4 Release 1
(ESA mode only)
Yes
No
Yes
No