I noticed that the same source (.asm) file assemlbed with the older MPASM from microchip (prior to ByteCraft assembler) that created an .obj file is different in size than one assembled with the latest version of assembler, that give .hex files. Both read the same (into MPS16B), and verify the same, just wondering if the .hex now has some header info, or what ? Anyone know the answer - not imparative, just curious. Harrison Cooper hcooper@es.com