gtps1m5oSystem Macros

TYPBC-Obtain Block Type and Size

Use this system macro to obtain the logical block type and logical size of a storage block in a format suitable for storing in a core block reference word (CBRW).

Format




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

On return the block type and logical size are in this register. Supported types are:

L0
128-byte block

L1
381-byte block

L2
1055-byte block

L4
4095-byte block.

Entry Requirements

The specified register must contain a valid block type.

Return Conditions

Programming Considerations

Examples

None.