Intel 80286 User Manual

SYSTEM CONTROL AND INITIALIZATION
MEMORY
CPU
,
GDTR
U!
15
0
·
J
-
·
GDTLIMIT
·
23 I
I
GDTBASE
I
--
15
0--
1
CURRENl
LDT
I LDT
LDTl
I
r-------.,
I
·
15 0 I
I
·
I
·
I
i
I
I
LDTLIMIT
-I
23
I
I
i
..J
I
LDTBASE
I
LDT
n
I
PROGRAM INVISIBLE
I
I
LDTR
L ________ ....I
·
·
·
Figure 10-1. Local and Global Descriptor Table Definition
IDTR
!
CPU
15
J
IDTLIMIT
I
IDT BASE
i
23
0
MEMORY
GATE FOR
INTERRUPT #n
GATE FOR
INTERRUPT #"-1
·
·
·
GATE FOR
INTERRUPT #1
INTERRUPT #0
\
J
,.,
INTERRUPT
DESCRIPTOR
TABLE
(lDT)
Figure 10-2. Interrupt Descriptor Table Definition
10-2
G3010B
G3010B
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Intel 80286 Specifications

General

Processor Type	Microprocessor
Clock Speed	6 MHz to 25 MHz
Transistor Count	134, 000
Addressable Memory	16 MB
Instruction Set	x86
Architecture	x86
Data Bus Width	16-bit
Address Bus Width	24-bit
Operating Modes	Real mode, Protected mode
Process Technology	1.5 µm
Voltage	5V
Introduced	1982
Package	68-pin PGA