Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

                                             ◄Up► ◄Contents► ◄Index► ◄Back►
────────────────────────────────────────────────────────────────────────────
 
     The three-bit register (reg) field specifies one of the following
     general-purpose registers:
 
             If w=1          If w=0
     reg     (16/32-bit)     (8-bit)
 
     000     AX/EAX          AL
     001     CX/ECX          CL
     010     DX/EDX          DL
     011     BX/EBX          BL
     100     SP/ESP          AH
     101     BP/EBP          CH
     110     SI/ESI          DH
     111     DI/EDI          BH
 
     The register field can also specify encoding information rather
     than a register name.
                                    -♦-