System Control

These instructions change the state of the 68000 processor. They require that the supervisor bit is set.

MOVE USP Gives a program in supervisor mode access to the stack pointer in user mode.
RESET Restores the peripheral units.
RTE Returns from an interrupt.
STOP Stops the execution until a given interrupt occurs.
CHK, TRAPV Finds fatal program errors.
TRAP 16 instructions that give a program in user mode the possibility to call another program in supervisor mode.