Intel 80287, 80286 manual Instruction SET

					THE 80286 INSTRUCTION SET
			Table B-3. Hexadecimal Values for the Access Rights Byte
	Not present,				Present,
	privilege =				privilege=			Descriptor Type
0	1	2	3	0	1	2	3
00	20	40	60	80	AO	CO	EO	Illegal
01	21	41	61	81	A1	C1	E1	Available Task State Segment
02	22	42	62	82	A2	C2	E2	Local Descriptor Table Segment
03	23	43	63	83	A3	C3	E3	Busy Task State Segment
04	24	44	64	84	A4	C4	E4	Call Gate
05	25	45	65	85	A5	C5	E5	Task Gate
06	26	46	66	86	A6	C6	E6	Interrupt Gate
07	27	47	67	87	A7	C7	E7	Trap Gate
08	28	48	68	88	A8	C8	E8	Illegal
09	29	49	69	89	A9	C9	E9	Illegal
OA	2A	4A 6A 8A			AA	CA	EA	Illegal
OB	2B	4B	6B	8B	AB	CB	EB	Illegal
OC	2C	4C	6C	8C	AC	CC	EC	Illegal
00	20	40	60	80	AD	CD	ED	Illegal
OE	2E	4E	6E	8E	AE	CE	EE	Illegal
OF	2F	4F	6F	8F	AF	CF	EF	Illegal
10	30	50	70	90	BO	DO	FO	Expand-up, read only, ignored Data Segment
11	31	51	71	91	B1	01	F1	Expand-up, read only, accessed Data Segment
12	32	52	72	92	B2	02	F2	Expand-up, writable, ignored Data Segment
13	33	53	73	93	B3	03	F3	Expand-up, writable, accessed Data Segment
14	34	54	74	94	B4	04	F4	Expand-down, read only, ignored Data Segment
15	35	55	75	95	B5	05	F5	Expand-down, read only, accessed Data Segment
16	36	56	76	96	B6	06	F6	Expand-down, writable, ignored Data Segment
17	37	57	77	97	B7	07	F7	Expand-down, writable, accessed Data Segment
18	38	58	78	98	B8	08	F8	Non-conform, no read, ignored Code Segment
19	39	59	79	99	B9	09	F9	Non-conform, no read, accessed Code Segment
1A	3A	5A	7A	9A	BA	DA	FA	Non-conform, readable, ignored Code Segment
1B	3B	5B	7B	9B	BB	DB	FB	Non-conform, readable, accessed Code Segment
1C	3C	5C	7C	9C	BC	DC	FC	Conforming, no read, ignored Code Segment
10	3D	50	70	90	BD	DO	FD	Conforming, no read, accessed Code Segment
1E	3E	5E	7E	9E	BE	DE	FE	Conforming, readable, ignored Code Segment
1F	3F	5F	7F	9F	BF	OF	FF	Conforming, readable, accessed Code Segment

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