rewrote error checking mechanism
fixed some opcode cases not being right
fixed various opcode and codegen bugs
fixed stack alignment problems
made proc aligned to a dword
fixed up helpers naming scheme
started marking opcodes as either working or not working
probably more -- too much to list
--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40110