Rev 1.0b
        Compile with Micro-C 3.0
        Expand serial input buffer to 250 bytes
        Fix 100 us delay loop

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

Rev 0.4a
        Collect common code, add checksums

Rev 0.3f
        Relocate RAM to A000

Rev 0.3e
        Change default address to TERM0 instead of LCD.

Rev 0.3d
        Recompile to get all code in step

Rev 0.3c
        Add battery-backed RAM network address functions
        Add output bits
        Add \b to activate BELL output

Rev 0.3b
        Add \f escape character to clear LCD panel