Allocate Specific LDT Descriptor

Call With

AX = 000DH
BX = selector

Returns

if function successful
Carry flag = clear
and descriptor has been allocated

if function unsuccessful
Carry flag = set
AX = error code

8011H	descriptor unavailable (descriptor is in use)
8022H	invalid selector (references GDT or beyond the LDT limit)

Notes

• The first 10H (16) descriptors (selector values 04H-7CH) are reserved for this function and must not be used by the DPMI host.

• Under DPMI 0.9 hosts, if another application has already been loaded, some of descriptors reserved for allocation by this function may be already in use and unavailable. Under DPMI 1.0 hosts, each client has its own LDT and thus will have the full 16 descriptors available for use with this function.

• Resident service providers (protected-mode TSRs) should not use this function.

• Refer to the rules for descriptor usage in Appendix D.