The header file <inmaxq.h> defines a number of intrinsic functions of general use for the MAXQ processor.

Status register manipulation functions
__disable_interrupt Ddisable interrupts
__enable_interrupt Enable interrupts
__save_interrupt Save interrupt enable flag state
__restore_interrupt Restore interrupt enable flag state
Data manipulation
__swap_nibbles Swap nibbles within a byte
__swap_bytes Swap bytes within a word
Miscellaneous functions
__delay_cycles Delay processor for a number of cycles
__no_operation Insert a NOP instruction into code
__insert_opcode Insert an instruction into code