Hi Henrik,

I am pleased to advise that I now have a simple LCDOUT and LED Blink program operating as expected.
When I went through the '2431 datasheet regarding OSCON Register I selected OSCON = %0111110 which is somewhat different to what you suggested.
Both work but I am curious to know how, when and why bits 0-3 of the OSCON register should be used. Any comments?

My next stage of experimentation will be to get the serial LCD display working in the background using the HSEROUT statement. From there I will move onto ADCin to read a pot and follow up with the HPWM command.

Progress is slow but I am trying to understand "why" things are the way they are in conjunction with learning "how" to do things.

Cheers
Barry
VK2XBP