This directory contains only RTL parts specific to the processor I386 family. (They are specific because they contain assembler instructions) Include files for system are : heap.inc (heap handling) set.inc (sets operations) math.inc (mathematic operations using the coprocessor) i386.inc (several functions/procedures containing assembler parts) setjump.inc (setjmp/longjmp implementation for exceptions) rttip.inc (rtti handling, for speed reasons) Units are : strings.pp (written in assembler for speed) cpu.pp (routines to access cpu info) mmx.pp (special mmx routines)