change DEFB/DEFW ot DB/FW
change DEFS to DS
change DS 1/2/4 to DB/DW/DD
change DEFM to DB
clean up
change DS to DEFS for easy search
clean up DEFS
remove EOF(0x1a)
change REL to RELSHORT for nasm
comment out END
change dword literal 'SC' to 'C'+'S'*100H
add to_nasm.sh