gtps1m45System Macros

PHYBC-Return Physical Size of Storage Block

Use this system macro to return the physical size of a storage block.

Note:
You cannot use all of the available physical storage in a block. You can only use the user size of the block, which is available from the SIZBC macro. The remaining portion of the block is available for system use only. This portion will not be saved on DASD if a block is filed.

See TPF General Macros for more information about the SIZBC macro.

Required Authorizations
Key0 Restricted System Common Storage

X

Format




TYPE=R1|Rn
The specified register contains the logical storage block type value. Register R1 is the default value. R0 is not valid for all calls and R8 through R13 are not valid for E-type calls.

Sizes are returned for the following block type equates:

LECB (or L3)
Entry Control Block

LIOCB
I/O Control Block

LSWB
System Work Block

LCOMMON
Common frame

LFRAME
Frame

Entry Requirements

Return Conditions

Programming Considerations

Examples

None.