Good article. PA-RISC is a little weirder than the article lets on. The stack and heap are reversed - heap starts high and grows lows, while the stack starts l

Good article. PA-RISC is a little weirder than the article lets on. The stack and heap are reversed - heap starts high and grows lows, while the stack starts low and grows up. This probably prevents a lot of casual buffer overflows. It also has a 4-bit segment register. It's not the ugly overlapping segmentation of the x86, more like a register that selects completely different, non-overlapping, address spaces.