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VL/ISA-PB486P3

UNIDENTIFIED

VL/ISA-PB486P3

Processor

80486SX/CX486DX/80486DX/80486DX2/80486DX4/P24D/Pentium Overdrive

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 220mm

I/O Options

32-bit VESA local bus slots (3), green PC connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo switch

CN1 (pins 1 - 2)

Green PC connector

JP32

Turbo LED

CN1 (pins 3 - 4)

Reset switch

S1

Power LED & keylock

J2

32-bit VESA local bus slots

SL1 - SL3

Speaker

JP18

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Ľ

CPU voltage select 5v

JP1

Closed

 

CPU voltage select 3.3v

JP1

Open

Ľ

CMOS memory normal operation

JP26

pins 2 & 3 closed

 

CMOS memory clear

JP26

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(4) 256K x 9

NONE

NONE

2MB

NONE

(1) 512K x 36

NONE

4MB

(4) 1M x 9

NONE

NONE

4MB

NONE

(1) 1M x 36

NONE

4MB

NONE

(1) 512K x 36

(1) 512K x 36

6MB

NONE

(1) 512K x 36

(1) 1M x 36

8MB

(4) 1M x 9

NONE

(1) 1M x 36

8MB

NONE

(1) 2M x 36

NONE

8MB

NONE

(1) 1M x 36

(1) 1M x 36

10MB

NONE

(1) 512K x 36

(1) 2M x 36

12MB

(4) 1M x 9

NONE

(1) 2M x 36

12MB

NONE

(1) 1M x 36

(1) 2M x 36

16MB

(4) 4M x 9

NONE

NONE

16MB

NONE

(1) 2M x 36

(1) 2M x 36

16MB

NONE

(1) 4M x 36

NONE

20MB

(4) 1M x 9

NONE

(1) 4M x 36

20MB

NONE

(1) 1M x 36

(1) 4M x 36

32MB

(4) 4M x 9

NONE

(1) 4M x 36

32MB

NONE

(1) 4M x 36

(1) 4M x 36

32MB

NONE

(1) 8M x 36

NONE

64MB

NONE

(1) 8M x 36

(1) 8M x 36

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

JP10

JP11

JP13

64KB

Open

Open

pins 2 & 3 closed

128KB

Open

Closed

pins 1 & 2 closed

256KB

Closed

Closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP3

JP4

JP5

JP6

JP7

80486SX

Open

Open

Open

1 & 2

Open

SL80486SX

Open

Open

Open

1 & 2

Open

CX486DX (1x)

1 & 2

Open

2 & 3

2 & 3

Open

CX486DX (2x)

1 & 2

Open

2 & 3

2 & 3

Open

80486DX

1 & 2

Open

2 & 3

1 & 2

Open

SL80486DX

1 & 2

Open

2 & 3

1 & 2

Open

80486DX2

1 & 2

Open

2 & 3

1 & 2

Open

SL80486DX2

1 & 2

Open

2 & 3

1 & 2

Open

80486DX4 (2x)

1 & 2

Open

2 & 3

1 & 2

Open

80486DX4 (2.5x)

1 & 2

Open

2 & 3

1 & 2

Open

80486DX4 (3x)

1 & 2

Open

2 & 3

1 & 2

Open

P24D (WB)

1 & 2

Open

2 & 3

1 & 2

1 & 2

P24D (WT)

1 & 2

Open

2 & 3

1 & 2

2 & 3

Pentium Overdrive

1 & 2

Closed

2 & 3

1 & 2

Open

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CONíT)

Type

JP8

JP9

JP12

JP22

JP23

80486SX

2 & 3

Open

Open

1 & 2

Open

SL80486SX

2 & 3

Open

Open

1 & 2

Open

CX486DX (1x)

1 & 2

1 & 2

Open

1 & 2

Open

CX486DX (2x)

1 & 2

1 & 2

Open

1 & 2

Open

80486DX

1 & 2

Open

Open

1 & 2

Open

SL80486DX

1 & 2

Open

Open

1 & 2

Open

80486DX2

1 & 2

Open

Open

1 & 2

Open

SL80486DX2

1 & 2

Open

Open

1 & 2

Open

80486DX4 (2x)

1 & 2

Open

Open

1 & 2

Open

80486DX4 (2.5x)

1 & 2

Open

Open

1 & 2

Open

80486DX4 (3x)

1 & 2

Open

Open

1 & 2

Open

P24D (WB)

1 & 2

2 & 3

Closed

1 & 2

Closed

P24D (WT)

1 & 2

2 & 3

Closed

1 & 2

Closed

Pentium Overdrive

1 & 2

2 & 3

Open

1 & 2

Open

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CONíT)

Type

JP24

JP25

JP27

JP36

JP40

JP43

80486SX

Open

Open

Open

1 & 2

Closed

Open

SL80486SX

Closed

Closed

Open

2 & 3

Closed

Open

CX486DX (1x)

Open

Open

1 & 2

1 & 2

Closed

Open

CX486DX (2x)

Open

Open

2 & 3

1 & 2

Closed

Open

80486DX

Open

Open

Open

1 & 2

Closed

Open

SL80486DX

Closed

Closed

Open

2 & 3

Closed

Open

80486DX2

Open

Open

Open

1 & 2

Closed

Open

SL80486DX2

Closed

Closed

Open

2 & 3

Closed

Open

80486DX4 (2x)

Closed

Closed

Open

2 & 3

Closed

1 & 2

80486DX4 (2.5x)

Closed

Closed

Open

2 & 3

Closed

2 & 3

80486DX4 (3x)

Closed

Closed

Open

2 & 3

Closed

Open

P24D (WB)

Closed

Closed

Open

2 & 3

Closed

Open

P24D (WT)

Closed

Closed

Open

2 & 3

Closed

Open

Pentium Overdrive

Open

Open

Open

1 & 2

Closed

Open

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JP38

JP39

25MHz

Open

Closed

33MHz

Closed

Open

40MHz

Open

Open

50iMHz

Open

Closed

50MHz

Closed

Closed

66iMHz

Closed

Open

VESA WAIT STATE CONFIGURATION

Wait states

JP33

0 wait states

Open

1 wait state

Closed

BUS SPEED CONFIGURATION

CPU speed

JP34

<= 33MHz

Open

> 33MHz

Closed