High Level Assembler - Opcodes overview, I/O Extension Set 9F

The table below lists all documented opcodes in extension set 9F for IBM mainframe processors. Each opcode links to a text section with additional info on the pertinent opcode.

Opcode Assignments.

Please note that the creation of descriptions for all individual instructions is an ongoing process. As yet no such descriptions have been created for the opcodes on this page.

Extension Set 9F - I/O Instructions

All instructions in this table are four bytes in length. The first byte always has a value of X'9F', the second byte has a value in the range X'00' through X'0F' and designates the exact instruction.

All entries in this table have a slightly darker background because the entire extension set is no longer supported on either current mainframe hardware or by IBM's current version of HLASM. The associated mnemonics are printed in italics.

9F0 0 1 2 3 4 5 6 7 8 9 A B C D E F
  TCH CLRCH                            


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