Rev 1.0b
        Recompile with Micro-C 3.0
        Expand serial input buffer to 250 bytes


Rev 1.0a
        Add net mode 3 with command acknowledgement
        Force RESET to wait for serial output completion

Rev 0.6a
        Collect common code, add checksums

Rev 0.5e
        Relocate RAM to A000

Rev 0.5d
        Workaround for in-line assembler "semicolon" glitch
        Recompile to get all code in step

Rev 0.5c
        IR transmitter output polarity is now + for IR signal.

Rev 0.5b
        Set network address string in battery-backed RAM
        Add output bits