John Mullan wrote:
>
> Can anyone point me to some good simulator programs that won't empty my
> wallet or need a second mortgage on my house????
>
> This seems like good software (UMPS that is) but is seriously over-priced
> for most of us hobby builders!!!!

Have a look at virtual breadboard. It may be what you are after.
http://www.dontronics.com/vb.html

Don McKenzie    mailto:don@dontronics.com      http://www.dontronics.com

World's Largest Range of Atmel/AVR and  PICmicro Hardware and  Software.
Free Basic Compiler and Programmer http://www.dontronics.com/runavr.html