Intel 80286 User Manual

80286 BASE ARCHITECTURE
Table 2-4.
80286 Interrupt Vector Assignments (Real Address Mode)
Interupt Related
Return Address
Function Before Instruction
Number Instructions
Causing Exception?
Divide error exception
0 DIV,IDIV Yes
Single step interrupt
1 All
NMI interrupt
2 All
Breakpoint interrupt
3 INT
INTO detected overflow exception
4 INTO
No
BOUND range exceeded exception
5
BOUND Yes
Invalid opcode exception
6
Any undefined
Yes
opcode
Processor extension not available exception
7 ESC or WAIT Yes
Interrupt table limit too small exception
8 INT vector is not Yes
within table limit
Processor extension segment overrun
9
ESC with memory
No
interrupt operand extending
beyond offset
FFFF(H)
Reserved
10-12
Segment overrun exception 13 Word memory
Yes
reference with
offset
= FFFF(H) or
an attempt to
execute past the
end of a segment
Reserved
14, 15
Processor extension error interrupt 15
ESC or \"}.A.!T
Reserved
17-31
User defined
32-255
2-26
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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