Int 15 Fn D804  - Eisa System Rom - Read Physical Slot                     [X]

   AX = D804h
   CL = slot number (including embedded and virtual)

Return: CF clear if successful
       AH = 00h
   CF set on error
       AH = error code (80h,83h,86h) (see #0463)
   SI:DI = 4-byte compressed ID (DI = bytes 0&1, SI = bytes 2&3)

Note:  call with AL=84h if using 32-bit CS addressing mode instead of 16-bit

See Also: AX=D800h