Click above to get retro games delivered to your door ever month!

                        Machine Identification Byte

            Model  Sub-Model          Machine

                FF      ??      Original IBM PC  4/24/81
                        ??      IBM PC  10/19/81
                        ??      IBM PC  10/27/82
                FE      ??      IBM XT (Original)
                        ??      IBM portable PC
                        ??      Compaq DeskPro
                FD      ??      PCjr
                FC      ??      IBM AT (6 MHz)
                        01      IBM AT 3x9 (8 MHz)
                        02      IBM XT 286
                        04      IBM PS/2 Model 50
                        05      IBM PS/2 Model 60
                        0B      IBM PS/1
                FB      00      IBM 256/640K XT (aka XT/2)
                FA      00      IBM PS/2 Model 30
                        01      IBM PS/2 Model 25
                F9      00      IBM PC Convertible
                F8      00      IBM PS/2 Model 80  (16 MHz)
                        01      IBM PS/2 Model 80  (20 MHz)
                        04      IBM PS/2 Model 70  (20 MHz)
                        09      IBM PS/2 Model 70  (16 MHz)
                B6      ??      Hewlett Packard 110
                9A      ??      Compaq Plus
                86              XT (BIOS 11/82+) & AT (BIOS 1/84+) (see note)
                80              PC & PCjr (see note)
                2D      ??      Compaq PC


        - found at memory location F000:FFFE or via INT 15,C0
        - model values of 80 & 86 are returned by BIOS versions previous
          to the PS/2 but after the BIOS dates marked

        - see   INT 15,C0