I did indeed get caught by the printf "core hog". I started playing with the larger members of the LPC family and the printf in the gcc compiler did not bother me, however when moving to the LPC2103 I ran out of code memory fast! The gcc printf gobbled up about 12k of code. I quickly changed to some less greedy print formatters!

Erik, I've never had to deal with "core" memory - the first memory chips I used was a 2708 and a 2101 sram connected to my ins8050(pmos)sc/mp processor if my 'memory' serves me correct.