Not existence graphic board(0). Use UART-A.
(C) Copyright Omron Corporation 1989, 1990, 1991
    ROM Version 1.22, 40 Megabytes RAM, 4 CPUs
NVRAM initialize
    Memory Check: 3Port passed, main 00120000
aborted
ROM Monitor
0>h
                **********  HELP MESSAGE  **********
        b       :       loads and executes target program
        d       :       memory dump
        c       :       memory modify
        f       :       fill memory
        dr      :       dump register
        cr      :       modify register
        z       :       set/delete break point
        s       :       step execution
        h       :       display help message, ex. h [command_name]
        x       :       execute/continue program
        install :       useful command for install
        status  :       display multi cpus status
        nvram   :       set/display nvram information
        clock   :       dipsplay clock status, stop/start clock
        version :       Display version & etc
        RESET   :       invoke a Power-On-Reset(Hard reset)
        poweroff:       invoke a Power-Off