HwMuseum | Index

UNIDENTIFIED

3486HN CACHE MAINBOARD

Processor

AM386DX/80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2

Processor Speed

20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 220mm

I/O Options

None

NPU Options

80387DX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J2

Turbo LED

J44

Power LED & keylock

J42

Reset switch

J45

Turbo switch

J43

Speaker

J46

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CMOS memory normal operation

J3

pins 2 & 3 closed

 

CMOS memory clear

J3

pins 1 & 2 closed

»

80386 speed select 33MHz

J4

Closed

 

80386 speed select 40MHz

J4

Open

»

Factory configured - do not alter

J5

N/A

»

Monitor type select color

J6

Closed

 

Monitor type select monochrome

J6

Open

»

80386 PQFP CPU disabled

J24

Closed

 

80386 PQFP CPU enabled

J24

Open

»

80486 PQFP CPU disabled

J27

Closed

 

80486 PQFP CPU enabled

J27

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U29)

TAG (U30)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

128KB

(4) 32K x 8

NONE

(1) 8K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

CACHE JUMPER CONFIGURATION

Size

J34

J36

J37

J38

64KB

Open

pins 2 & 3 closed

Open

Open

128KB

Closed

pins 1 & 2 closed

Closed

Open

256KB

Closed

pins 2 & 3 closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

J23

J31

80386DX

pins 1 & 2 closed

Open

CX486DLC

pins 1 & 2 closed

Open

80486SX/DX/DX2

pins 2 & 3 closed

Closed

CPU TYPE CONFIGURATION

Type

J25

J26

Cyrix

Closed

Closed

AMD/Intel

Open

Open

CPU TYPE CONFIGURATION

Type

J28

J29

J41

80486SX (PQFP)

Closed

pins 2 & 3 closed

Open

80486 (PGA)

Open

pins 2 & 3 closed

Open

80487SX

Open

pins 2 & 3 closed

pins 2 & 3 closed

80486DX/DX2

Closed

pins 1 & 2 closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

J39

J40

80386DX

pins 1 & 2 closed

pins 2 & 3 closed

CX486DLC

pins 1 & 2 closed

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

80486DX2

pins 2 & 3 closed

pins 2 & 3 closed

CPU CLOCK SPEED CONFIGURATION

Speed

J30

J32

40MHz

Closed

Closed

50MHz

Closed

Open

66MHz

Open

Closed

80MHz

Open

Open