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     The _bios_equiplist routine uses INT 0x11 to determine what
     hardware and peripherals are currently installed.
 
     Return Value
 
     The function returns a set of bits indicating what is installed,
     as defined below:
 
     Bits      Meaning
 
      0        Any disk drive installed if true
      1        Coprocessor (except on PC)
      2-3      System RAM in 16K blocks (16-64K)
      4-5      Initial video mode
      6-7      Number of floppy disk drives installed (00=1, 01=2, etc.)
      8        False (0) if and only if a DMA chip is installed
      9-11     Number of RS232 serial ports
     12        True (1) if and only if a game adapter is installed
     13        True (1) if and only if an internal modem is installed
     14-15     Number of printers installed
                                    -♦-