8. Descriptor Management Services, Continued

8.11 Get Descriptor

This function copies the descriptor table entry for a specified descriptor into an eight byte buffer.

To Call

     AX = 000Bh
     BX = Selector
     ES:(E)DI =  Pointer to an 8 byte buffer to receive copy
          of descriptor

Returns

     If function was successful:
     Carry flag is clear.
     ES:(E)DI = Pointer to buffer that contains descriptor

     If function was not successful:
     Carry flag is set.

Programmer's Notes

• Since this function involves descriptor management, it will be rarely needed in 32-bit programs.
• This function will fail if the selector specified in BX is invalid or unallocated.
• 32-bit programs must use ES:EDI to point to the buffer. 16-bit programs should use ES:DI.