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VL/ISA-PB486P3

QDI COMPUTER, INC.

VL/ISA-PB486P3

Processor

80486SX/SL80486SX/CX486M7/80486DX/SL80486DX/80486DX2/80486DX4/P24D/Pentium Overdrive

Processor Speed

25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz

Chip Set

OPTI

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

J1

Green PC connector

JP21

Power LED & keylock

J2

Green PC connector

JP32

Turbo LED

J3

Reset switch

S1

Speaker

JP18

32-bit VESA local bus slots

SL1 - SL3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Battery type select internal

JP26

pins 2 & 3 closed

 

CMOS memory clear

JP26

pins 1 & 2 closed

»

Monitor type select color

JP30

Closed

 

Monitor type select monochrome

JP30

Open

»

Factory configured - do not alter

JP44

pins 2 & 3 closed

»

Factory configured - do not alter

JP46

pins 2 & 3 closed

Note: The locations of JP44 & JP46 are unknown.

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) 4M x 36

NONE

16MB

NONE

(1) 2M x 36

(1) 2M x 36

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

JP24

JP25

JP36

64KB

Open

Open

2 & 3

Closed

Closed

2 & 3

128KB

Open

Closed

1 & 2

Open

Open

Open

256KB

Closed

Closed

2 & 3

Closed

Closed

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP3

JP4

JP5

JP6

JP7

JP8

80486SX

Open

Open

Open

1 & 2

Open

2 & 3

SL80486SX

Open

Open

Open

1 & 2

Open

2 & 3

CX486M7 (1x)

1 & 2

Open

2 & 3

2 & 3

Open

1 & 2

CX486M7 (2x)

1 & 2

Open

2 & 3

2 & 3

Open

1 & 2

80486DX

1 & 2

Open

2 & 3

1 & 2

Open

1 & 2

SL80486DX

1 & 2

Open

2 & 3

1 & 2

Open

1 & 2

80486DX2

1 & 2

Open

2 & 3

1 & 2

Open

1 & 2

80486DX4

1 & 2

Open

2 & 3

1 & 2

Open

1 & 2

P24D (WB)

1 & 2

Open

2 & 3

1 & 2

1 & 2

1 & 2

P24D (WT)

1 & 2

Open

2 & 3

1 & 2

2 & 3

1 & 2

P24T

1 & 2

Closed

2 & 3

1 & 2

Open

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)

Type

JP9

JP12

JP22

JP23

JP27

JP40

JP43

80486SX

Open

Open

1 & 2

Open

Open

Open

Open

SL80486SX

Open

Open

1 & 2

Open

Open

Open

Open

CX486M7 (1x)

1 & 2

Open

1 & 2

Open

1 & 2

Open

Open

CX486M7 (2x)

1 & 2

Open

1 & 2

Open

2 & 3

Open

Open

80486DX

Open

Open

1 & 2

Open

Open

Open

Open

SL80486DX

Open

Open

1 & 2

Open

Open

Open

Open

80486DX2

Open

Open

1 & 2

Open

Open

Open

Open

80486DX4

Open

Open

1 & 2

Open

Open

Closed

see below

P24D (WB)

2 & 3

Closed

1 & 2

Closed

Open

Open

Open

P24D (WT)

2 & 3

Closed

1 & 2

Closed

Open

Open

Open

P24T

2 & 3

Open

1 & 2

Open

Open

Open

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

75iMHz

Open

Closed

100iMHz

Closed

Open

CPU CLOCK SPEED CONFIGURATION (80486DX4)

Speed

JP43

2x

Open

2.5x

pins 2 & 3 closed

3x

pins 1 & 2 closed

CPU VOLTAGE CONFIGURATION

Voltage

JP1

3.3v

Open

5v

Closed

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