This chapter contains information specific to the Intel i386 processor architecture, which includes the i386, i486, and Pentium processors. The first section, " i386 Registers and Addressing Modes," lists the registers available and describes the addressing modes used by assembler instructions. The second section, " i386 Assembler Instructions," lists each assembler instruction with Mac OS X assembler syntax.
Don't confuse the i386 architecture with the i386 processor. The Mac OS X Assembler for Intel processors makes use of instructions specific to the i486 processor, and will not run on an i386 processor.