If Supervisor State
Then Rc → Rn or Rn → Rc
Else TRAP
MOVEC Rc,Rn
MOVEC Rn,RcSize longword
Moves the contents of the specified control register (Rc) to the specified general register (Rn) or copies the contents of the specified general register to the specified control register. This is always a 32-bit transfer, even though the control register may be implemented with fewer bits. Unimplemented bits are read as zeros.
Not affected.
From MOTOROLA M68000 FAMILY Programmer's reference manual. Copyright 1992 by Motorola Inc./NXP. Adapted with permission.