Reads and/or sets the value of the specified memory register. If "register number" only is specified, the current value is read. If [:Setting value] is specified, the value is set in the specified register.
@RRG(Register number<3 digits>)[:Setting value<hexadecimal value>] CR
XXH : Register contents
OK : Normal end
E1 : Command error
=>"@RRG002" CR Reads the contents of register REG002.
<="00H" CR LF Outputs the memory register value (00h).
=>"@RRG002:01" CR Sets the value of REG002 to 01h.
<="OK" CR LF Normal end.