SPI Programming Manual (G06.24+, H06.03+, J06.03+)

SPI Concepts and Protocol
SPI Programming Manual—427506-006
2-45
Subsystem IDs (SSIDs)
The subsystem version field (Z-VERSION) is a 16-bit unsigned integer value
representing the software release version of the subsystem. For NonStop Kernel
subsystems, this value is in the form returned by the TOSVERSION procedure: that is,
the left byte contains the letter part of the version as an ASCII uppercase alphabetic
character, and the right byte contains the numeric part of the version as an unsigned
integer value. For example, for the version “G06” the left byte is the ASCII character
G
and the right byte is 06, so the result is the unsigned integer 18182.
Each NonStop Kernel subsystem defines a subsystem ID structure giving the values of
all three fields for that subsystem. This structure has the name
subsys-VAL-SSID,
where
subsys is the subsystem abbreviation.