This is Steel Bank Common Lisp (SBCL) is a Open Source development environment for Common Lisp. This package was compiled on Slackware 9.1 using optimizations for i686/athlon. Normally I stick to using i486 opcodes since the improvements gained by dropping support for i486/i586 are usually marginal at best, but in this case I think most people interested in running SBCL will have i686 hardware (or better). I'd consider making an i486 arch package (using -march=i486 -mcpu-i686) if there are requests for it, though. Enjoy, Pat