INT 15 - EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). SYSTEM ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. - READ PHYSICAL SLOT 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 #00539) 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 SeeAlso: AX=D800h