EISA-3 SYSTEM BOARD Motherboard Settings and Configuration

Processor

80486SX/80486DX/ODP486SX/80486DX2

Processor Speed

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

Chip Set

Micronics

Max. Onboard DRAM

64MB

Cache

64/128/256/512KB

BIOS

Phoenix

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J3

Power LED & keylock

J11

Turbo LED

J5

Speaker

J13

Turbo switch

J8

External keyboard connector

J23

Reset switch

J9

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

J12

Closed

Monitor type select monochrome

J12

Open

»

Factory configured - do not alter

J25

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(1) 1M x 36

NONE

NONE

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 4M x 36

NONE

NONE

NONE

20MB

(1) 1M x 36

(1) 4M x 36

NONE

NONE

24MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

NONE

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

NONE

40MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG/U101

TAG/U102

TAG/U103

TAG/U104

64KB

(4) 8K x 8

(4) 8K x 8

NONE

NONE

(1) 64K x 1

(1) 32K x 8

128KB

(4) 32K x 8

NONE

NONE

NONE

(1) 64K x 1

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 16K x 4

(1) 16K x 4

(1) 64K x 1

NONE

512KB

(4) 128K x 8

NONE

NONE

NONE

(1) 64K x 1

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

J15

J16

J17

J18

J19

J20

J21

J22

64KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

3 & 4

128KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

4 & 5

256KB

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

512KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

4 & 5

Note:Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

J7

J10

25MHz

Closed

Closed

33MHz

Open

Closed

50i MHz

Closed

Closed

50MHz

Open

Open

66i MHz

Open

Closed

CPU TYPE CONFIGURATION

U1

U2

JP1

JP2

JP3

80486SX

NONE

pins 1 & 2 closed

pins 3 & 4 closed

pins 2 & 3 closed

NONE

80486SX

pins 1 & 2 closed

pins 3 & 4 closed

pins 2 & 3 closed

NONE

80486DX

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 and 3 & 4 closed

NONE

80486DX2

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 and 3 & 4 closed

80486SX

80487SX

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 and 3 & 4 closed

80486SX

80486DX

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 and 3 & 4 closed

80486SX

80486DX2

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 and 3 & 4 closed

80486SX

ODP486SX

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 and 3 & 4 closed