)
Values for system segment descriptor type:
 0	reserved
 1	available 16-bit TSS
 2	LDT
 3	busy 16-bit TSS
 4	16-bit call gate
 5	task gate
 6	16-bit interrupt gate
 7	16-bit trap gate
 8	reserved
 9	available 32-bit TSS
 10	reserved
 11	busy 32-bit TSS
 12	32-bit call gate
 13	reserved
 14	32-bit interrupt gate
 15	32-bit trap gate
SeeAlso: #00502,#00504