# 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.