Name: Intel 386
Brand: Intel
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Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL

E-12

within segment adding

immed to SP

1 1 0 0 0 0 1 0 16-bit displacement

12 + m b g, h, r

intersegment

1 1 0 0 1 0 1 1

36 + m b g, h, j, k,

intersegment adding

immed to SP

1 1 0 0 1 0 1 0 16-bit displacement

36 + m b g, h, j, k,

Protected mode only (RET):

to different privilege level

Intersegment 72 h, j, k, r

Intersegment adding immed to SP 72 h, j, k, r

CONDITIONAL JUMPS

(times are jump “Taken or not Taken”)

JO = jump on overflow

8-bit displacement

0 1 1 1 0 0 0 0 8-bit displacement

7 + m

or 3

7 + m

or 3

Full displacement

0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 Full displacement

7 + m

or 3

7 + m

or 3

JNO = Jump on not overflow

8-bit displacement

0 1 1 1 0 0 0 1 8-bit displacement

7 + m

or 3

7 + m

or 3

Full displacement

0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 1 Full displacement

7 + m

or 3

7 + m

or 3

JB/JNAE = jump on below/not above or equal

8-bit displacement

0 1 1 1 0 0 1 0 8-bit displacement

7 + m

or 3

7 + m

or 3

Full displacement

0 0 0 0 1 1 1 1 1 0 0 0 0 0 1 0 Full displacement

7 + m

or 3

7 + m

or 3

JNB/JAE = jump on not below/above or equal

8-bit displacement

0 1 1 1 0 0 1 1 8-bit displacement

7 + m

or 3

7 + m

or 3

Full displacement

0 0 0 0 1 1 1 1 1 0 0 0 0 0 1 1 Full displacement

7 + m

or 3

7 + m

or 3

JE/JZ= jump on equal/zero

8-bit displacement

0 1 1 1 0 1 0 0 8-bit displacement

7 + m

or 3

7 + m

or 3

Full displacement

0 0 0 0 1 1 1 1 1 0 0 0 0 1 0 0 Full displacement

7 + m

or 3

7 + m

or 3

JNE/JNZ = jump on not equal/not zero

8-bit displacement

0 1 1 1 0 1 0 1 8-bit displacement

7 + m

or 3

7 + m

or 3

Table E-1. Instruction Set Summary (Sheet 11 of 19)

Instruction Format

Clock Count Notes

Real

Ad-

dress

Mode

Virtual

8086

Mode

Pro-

tected

Virtual

Ad-

dress

Mode

Real

Ad-

dress

Mode

Virtual

8086

Mode

Pro-

tected

Virtual

Ad-

dress

Mode

Architecture	x86
Clock Speed	12 MHz to 40 MHz
Transistor Count	275, 000
Data Bus Width	32-bit
Address Bus Width	32-bit
Instruction Set	x86
Introduced	1985
Maximum Memory	4 GB
Operating Modes	Real mode, Protected mode, Virtual 8086 mode
MMU	Yes
Voltage	5V
Model	Intel 386
Package	PGA
Process	1.5 μm to 1 μm

Intel 386 User Manual

Table of Contents

Questions and Answers:

Intel 386 Specifications

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