control codes for 4x20 lcd?

What are the control codes for accessing the 3rd & 4th lines of the 4x20 lcd available in the simulator?

Ok, I figured this out by accident. On the 4x20 lcd in the simulator, if you write to the 21st character of the first line, it appears as the first character of the third line. Likewise the 21st character of the 2nd line appears as the first of the fourth.

This is also the system most real 20x4s use.

I don't recall having previously tried my 'LCD memory map' program under PE6 simulation but it does seem to work -

http://www.picaxeforum.co.uk/showthread.php?20677-LCD-OLED-Memory-Mapping

Thanks, Technical, and thanks, hippy--neat program.