OPSYS parameter
Operating system
Summary
- Default value
- None
- Parameter type
- System
- Where set
- View-only
- Related products
- All
- Introduced
- Model 204 V2.1 or earlier
Description
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. |