OPSYS parameter: Difference between revisions

Revision as of 14:38, 19 April 2013

The operating system under which Model 204 is running

Valid settings of OPSYS are:

Setting	Meaning
`X'800000'`	Obsolete bit; ignore.
`X'400000'`	z/OS (any version). Bit is set whenever environment is z/OS.
`X'200000'`	IUCV communication available and in use.
`X'100000'`	z/OS supports real 64-bit storage.
`X'020000'`	64-bit virtual storage is supported.
`X'008000'`	z/VSE operating system
`X'004000'`	z/VSE 370 support
`X'002000'`	z/VSE 31-bit addressing supported
`X'001000'`	z/VM (any version). Bit is set whenever environment is z/VM. z/VM Release 7 or earlier, if not combined with X'000400'.
`X'000800'`	z/OS/ESA (z/OS SP2 or later). This option can be summed with X'400000'.
`X'000400'`	z/VM/ESA (CMS Release 8 or later). This option can be summed with X'001000'.
`X'000200'`	Fujitsu FACOM OSIV, F4 Edition, 40 OS.
`X'000100'`	Large data sets are supported.
`X'000080'`	Maintains the Breaking Event Address Register (BEAR), making its stored value available to `Model 204` debugging code. The BEAR, available on z9 or higher systems, stores the address of a breaking event in CPU sequential processing, such as a branch.
`X'000040'`	EAV volumes supported.
`X'000020'`	1 MB pages are supported.
`X'000008'`	I/O from 64-bit virtual storage areas is supported.

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 <tr><th align="right"><var>X'000008'</var></th><td>I/O from 64-bit virtual storage areas is supported.</td></tr>
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