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				 CPU

USAGE:
    CPU [options]

OPTIONS:
    Cache, Burst, NoCache, NoBurst, InstCache, InstBurst,  DataCache
    DataBurst, NoInstCache,  NoInstBurst,  NoDataCache,  NoDataBurst
    FastROM,    Check  [68010,68020,68030,68881,68882,68851,MMU,FPU]
    Trap

PURPOSE:
    To set/clear the CPU caches,  check for a  particular processor,
    load the  ROM image into fast  32-bit  memory or set an  illegal
    memory access handler which  will  output  information  out  the
    serial port at 9600 baud if a task accesses page zero (lower 256
    bytes) or memory above 16M.

SPECIFICATION:
    The CPU  command  will  alter  the  CACR  register  through  the
    CacheControl()  Exec  call,  copy  the ROM image into 32-bit RAM
    and  translate  the  ROM  memory  accesses through the  MMU,  or
    invalidate  page zero and memory above  16M,  and  write-protect
    the ROM area.  If mutually  exclusive options are selected,  the
    least destructive is chosen.

EXAMPLES:
    1> CPU
    System: 68030 68881 (INST: NoCache Burst) (DATA: Cache NoBurst)

    1> CPU Burst Cache Check MMU
    System: 68030 68881 (INST: Cache Burst) (DATA: Cache Burst)

    1> CPU NoBurst DataCache NoInstCache
    System: 68030 68881 (INST: NoCache NoBurst) (DATA: Cache NoBurst)

    1> CPU Burst Cache FastROM
    System: 68030 68881 FastROM (INST: Cache Burst) (DATA: Cache Burst)

    1> CPU nofastrom nodatacache
    System: 68030 68881 (INST: Cache Burst) (DATA: NoCache Burst)

      In order to turn the TRAP mode on, first install a bus error
      exception handler, then type CPU TRAP:

        1> run cputrap
        Trap handler installed
        1> CPU trap
        System: 68030 68881 Trap (INST: Cache Burst) (DATA: NoCache Burst)

      In order to remove an exception handler, first turn TRAP mode
      off, then execute TrapZero again:

        1> CPU NoTrap
        System: 68030 68881 (INST: Cache Burst) (DATA: NoCache Burst)
        1> cputrap
        Trap handler removed

      Now you are ready to load another exception handler. The TRAP
      and FastROM options are mutually exclusive.