0:410h                   Equipment List

Length: 2 bytes

Contains a list of the hardware installed on the system.

                                                                          

                        Equipment List

F E D C B A 9 8  7 6 5 4 3 2 1 0
x x . . . . . .  . . . . . . . .  Number of printers installed
. . x . . . . .  . . . . . . . .  Internal modem installed
. . . x . . . .  . . . . . . . .  Game adapter installed (always 1 on PCJr)
. . . . x x x .  . . . . . . . .  Number of RS-232 ports
. . . . . . . x  . . . . . . . .  Reserved
. . . . . . . .  x x . . . . . .  Number of diskettes - 1 (0=1 diskette)
. . . . . . . .  . . x x . . . .  Initial video mode (see below)
. . . . . . . .  . . . . x x . .  Reserved
. . . . . . . .  . . . . . . x .  Math coprocessor installed
. . . . . . . .  . . . . . . . x  1=diskettes present, 0=no diskettes


                     Initial video mode

               Value                 Meaning
00                  Reserved
01                  40 x 25 Color
10                  80 x 25 Color
11                  80 x 25 Monochrome

                                                                          

Notes:         Use INT 11h to access the equipment information via
the ROM BIOS interface.

The equipment list is initialized during the power-
up test (POST).

For the IBM PC, XT, and PCjr, bits 2 and 3 lists the
amount of RAM installed on the system board in
increments of 16K. For example, 00 means 16K, while
11 means 64K.

Bit 2 on the XT-286 reports whether or not a
pointing device is installed.

Bit 0 indicates only whether the system has one or
more diskette drives. Refer to bits 6 and 7 to find
out how many diskettes are actually present. To
determine the number of hard disks installed, use
INT 13h, Function 8.

If the DIP switches for PCs and XTs are not set
correctly reflecting the presence of a math
coprocessor, then bit 1 (math coprocessor present)
may be incorrect. A better test for the math
coprocessor would be to test it directly by
executing a math coprocessor instruction and then
checking to see if the instruction was executed.

See also: INT 11h

0:410h Equipment List