Steve,

I am using Tera Term Pro to communicate with the board; CR is the line terminator (but it's configurable for CR/LF).

The baud rate is 9600; I'm not sure how to manipulate the intercharacter time though...

Could there be a problem with the pull-up resisitors? Would the chip access external memory for a simple command like "PRINT MTOP"-- or does it simply store the value in an internal register after the bootup memory check?

Thanks,
Dan