SVC 44 (0A2C)

CHAP macro - is type 2, gets LOCAL lock.

Calls module IEAVECH0.

GTF data is:
R15
No applicable data.
R0
Signed value to be added to the dispatching priority of the specified task; negative value will be in two's-complement form.
R1
Address of the area containing the address of TCB whose priority is to be changed; or zeros. Zeros indicates that the active task's priority is to be changed.
TCB Address Comment
CHAP TCB hhhhhhhh Address of the TCB whose priority is to be changed. Must be a subtask of the current task.