INT 21 P - FlashTek X-32VM - DEALLOCATE PROTECTED-MODE SELECTOR
AX = 3502h
BX = selector
Return: CF clear if successful
CF set on error (invalid selector)
Note:   only selectors allocated via AX=3501h should be deallocated
SeeAlso: INT 31/AX=0001h

See also: 213501

213502 - FlashTek X-32VM - DEALLOCATE PROTECTED-MODE SELECTOR