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





486 MAINBOARD

CORE PACIFIC ELECTRONICS, INC.

486 MAINBOARD

Processor

80486DX

Processor Speed

33MHz

Chip Set

OPTI

Max. Onboard DRAM

40MB

Cache

64/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP3

Turbo LED

JP15

Reset switch

JP13

Speaker

JP16

Turbo switch

JP14

Power LED & keylock

JP17

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Power good signal detect from board

JP1

pins 2 & 3 closed

 

Power good signal detect from power supply

JP1

pins 1 & 2 closed

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

Factory configured - do not alter

JP12

Open

CMOS memory normal operation

JP18

pins 1 & 2 closed

 

CMOS memory clear

JP18

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

5MB

(4) 256K x 9

(4) 1M x 9

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB

(4) 256K x 9

(4) 1M x 9

(1) 1M x 36

NONE

10MB

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

(1) 1M x 36

12MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

NONE

13MB

(4) 256K x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB

(4) 4M x 9

NONE

NONE

NONE

20MB

(4) 1M x 9

(4) 4M x 9

NONE

NONE

20MB

(4) 4M x 9

(4) 1M x 9

NONE

NONE

24MB

(4) 1M x 9

(4) 4M x 9

(1) 1M x 36

NONE

24MB

(4) 4M x 9

(4) 1M x 9

(1) 1M x 36

NONE

28MB

(4) 1M x 9

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

28MB

(4) 4M x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

NONE

40MB

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

CACHE CONFIGURATION

Size

Bank 0

U39

U40

64KB

(8) 8K x 8

(1) 8K x 8

(1) 64K x 1

256KB

(8) 32K x 8

(1) 32K x 8

(1) 64K x 1

CACHE JUMPER CONFIGURATION

Size

JP4

JP5

JP6

64KB

Open

Open

Open

256KB

Closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP8

JP9

JP10

80486SX

Open

pins 2 & 3 closed

Open

80487SX

Closed

pins 1 & 2 closed

pins 1 & 2 closed

80486DX

Closed

pins 1 & 2 closed

pins 2 & 3 closed