Managing CMOS Processors › Hardware Access Facility (HAF) › HAF Message Format › Determining HAF Message Numbers

Determining HAF Message Numbers

To determine a HAF message number (mm)

1. Look up the hexadecimal value of the event type in the document IBM System z Application Programming Interfaces manual (SB10-7030-11).

   The number will have either no bits or a single bit on. Use the following table to determine the HAF message number.

2. Find the position of the bit that is on by numbering the bit positions from right to left with the rightmost position being 1. Consider no bits on to be position 0. Add one to the position to obtain the HAF message number.
3. Use the following table to find the mm value that corresponds to the hexadecimal event value.