~¬¬¬¬¬ ALL ¬¬¬¬¬¬®

Êʬ¬¬ ARCHLVL ¬¬¬ ¬¬¬¦¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¦¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬ÊÍ

facility

or

Êʬ¬¬ ARCHLVL ¬¬¬§¬¬¬ ¬¬¬¬§¬¬¬ bitno ¬¬¬§¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬§¬¬¬¬¬¬¬¬¬¬¬¬¬ÊÍ

8.12.3 Parameter

S/370

Use S/370 for OS/360, VM/370 and MVS 3.8.

ESA/390

Use ESA/390 for MVS/XA, MVS/ESA, OS/390, VM/ESA, VSE/ESA, Linux/390 and
ZZSA. zOS can be run until version 1.2 with ESA/390 mode without installed bimo-
dal feature or until version 1.4 if the bimodal feature is installed.

ESAME

Use ESAME (Enterprise System Architecture, Modal Extensions) for z/OS, z/VM,
z/VSE and z/Linux. The ESAME mode is equivalent to z/Archtecture mode at at
Architecture Level 2.

When ESAME is specified, the machine will always be IPL’ed in ESA/390 mode but
the system is capable of being switched into the z/Architecture mode after IPL. This
is handled automatically by all z/Architecture operating systems.

z/ARCH

Use z/ARCH for z/OS, z/VM, z/VSE and z/Linux. z/ARCH is similar to ESAME. The
z/Arch mode is equivalent to z/Architecture mode at Architecture Level 3.

ENABLE

Enable the specified facility. If no architecture mode is given as additional parame-
ter the facility is enabled for all architecture modes.

DISABLE

Disable the specified facility. If no architecture mode is given as additional parame-
ter the facility is disabled for all architecture modes.

facility

The name of the facility that has to be enabled, disabled or displayed. An overview
of all architecture facilities can be found in “

bitno

The bit number of the facility that has to be enabled or disabled. The format of bitno is
BITnn, e.g. “BIT44” (Bit 44 = PFPO Facility Bit). An overview of all architecture facilities
can be found in “

QUERY

Display the facility settings.

ALL

Specifies that all facilities have to be displayed.

8.12.4 Examples

Example 1:

Display the current setting of the architecture mode.

HHC00013I Herc command: 'archlvl'

HHC02203I Value 'archmode': 'S/370'

Figure 23: ARCHLVL command (display architecture mode)

Example 2:

Set the architecture level to z/ARCH.

HHC00013I Herc command: 'archlvl z/arch'

Figure 24: ARCHLVL command (set new architecture mode)

Example 3:

Disable the ‘DECIMAL_FLOAT’ facility in z/Architecture mode.

HHC00013I Herc command: 'archlvl disable decimal_float z/arch'

HHC00898I Facility(DECIMAL_FLOAT) disabled for archmode z/Arch

Figure 25: ARCHLVL command (enable facility)

Example 4:

Force the enabling of the PFPO feature (bit number 44) for all architecture modes.

HHC00013I Herc command: 'archlvl enable bit44'

HHC00898I Facility(44) enabled for archmode S/370

HHC00898I Facility(44) enabled for archmode ESA/390

HHC00898I Facility(44) enabled for archmode z/Arch

Figure 26: ARCHLVL command (force on facility)

Example 5:

Query all facilities.

HHC00013I Herc command: 'archlvl query all'

HHC00890I Facility(N3 ) Enabled

HHC00890I Facility(ESAME_INSTALLED ) Enabled

HHC00890I Facility(ESAME_ACTIVE ) Enabled

HHC00890I Facility(IDTE_INSTALLED ) Enabled