I've been having terrible problems with PropellerIDE's loader on my MacBook Pro. Most of the stuff I'd like to work on involves large executables ... close to 32K. The loader gets errors near the end of the download to almost any type of Prop1. I've gotten to where I compile on the MacBook and then startup Linux on a little HP laptop just to do the download. SimpleIDE seems to work better and I may transfer my attention to BlockyProp and C. I would like to be able to use some Spin library objects, particularly the 4-port serial driver, 1-wire driver, SPI flash driver, and others needed for the PKS (Propeller Keyfob System). Can someone point me to references on adding new assembly drivers to C and other suggestions for adding library routines. I'd like to make these additions compatible with BlocklyProp if possible. I know C although it's been years since I've used it.