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MICROPROCESSOR INSTRUCTION REFERENCE->MOVEC

MOVEC    Move Control Register

Compatibility: 68010, 68020 and CPU32 families.

This is a privileged instruction.

If supervisor state
        RC -> Rn   or   Rn -> Rc
else
        TRAP
    

Assembler syntax:	MOVEC Rc, Rn
	MOVEC Rn, Rc

Size:  Long

Moves the contents of the specified control register (Rc) to the specified general register (Rn) or visa versa.  This is always a 32 bit transfer even if the control register has fewer bits.  Unimplemented bits are read as zeros.

Condition codes:  not affected

Rc can be:

SFC    (Source function code)
DFC    (Destination function code)
CACR    (Cache control register  68020 only)
USP    (User stack pointer)
VBR    (Vector base register)
CAAR    (Cache address register  68020 only)
MSP    (Master stack pointer  68020 only)
ISP    (Interrupt stack pointer  68020 only)

Unsupported codes cause an illegal instruction exception.