...because we can't all be on the bleeding edge...





486-VESA

UNIDENTIFIED

486-VESA

Processor

CX486S/80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

PC Chips

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

250mm x 220mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo LED

J23

Turbo switch

J3

Power LED & keylock

J24

Speaker

J21

Weitek daughtercard connector

W1

Reset switch

J22

32-bit VESA local bus slots

SL1 & SL2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

J2

Closed

 

Monitor type select monochrome

J2

Open

Fast gate A20 mode enabled

J13

pins 1 & 2 closed

 

Fast gate A20 mode disabled

J13

pins 2 & 3 closed

Factory configured - do not alter

J25

Closed

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) 4M x 9

(4) 1M x 9

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CPU TYPE CONFIGURATION

Setting

J18

J19

J20

CX486S2

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2, 3 & 4 closed

80486DX2

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2, 3 & 4 closed

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

J4

J5

J6

64KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

128KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

256KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

CACHE WRITE MODE CONFIGURATION

Mode

Size

J15

J16

J17

Write-through

Any

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

Write-back

64KB

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

Write-back

128KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

Write-back

256KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

VESA WAIT STATE CONFIGURATION

Wait states

J12

J26

0 wait states

pins 2 & 3 closed

Open

1 wait state

pins 1 & 2 closed

Closed