HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                     BIOS System Descriptor Table  (PS/2)

    Offset Size             Description

       00   word       length of descriptor (8 minimum)
       02   byte       model byte (same as FFFF:E, not reliable)
       03   byte       secondary model byte
       04   byte       BIOS revision level (zero based)
       05   byte       feature information  (see table)
       06  dword       reserved


       │7│6│5│4│3│2│1│0│ feature information at offset 5
        │ │ │ │ │ │ │ └─── reserved
        │ │ │ │ │ │ └──── 0=PC bus, 1=Micro Channel
        │ │ │ │ │ └───── Extended BIOS Data Area (EBDA) allocated
        │ │ │ │ └────── wait for external event supported
        │ │ │ └─────── INT 15,4F used (kbd intercept)
        │ │ └──────── RTC present
        │ └───────── 2nd 8259 present
        └────────── DMA channel 3 used by fixed disk BIOS


       - see also  MACHINE IDENT  and  INT 15,C0

Esc or Alt-X to exit system descriptor Home/PgUp/PgDn/End ←↑↓→