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VL-486

UNIDENTIFIED

VL-486

Processor

80486SX/80487SX/ODP487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

UMC

Video Chip Set

None

Maximum Onboard Memory

32MB

Maximum Video Memory

None

Cache

128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

BATT

Turbo switch

CN4

Power LED & keylock

CN1

Turbo LED

CN5

Speaker

CN2

Auxiliary keyboard connector

KBD

Reset switch

CN3

32-bit VESA local bus slots

SL1 & SL2

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Battery type select internal

BATT

Pins 2 & 3 closed

 

Battery type select external

BATT

Closed

 

CMOS memory clear

BATT

Pins 3 & 4 closed

 

Monitor type select color

C/M

Closed

 

Monitor type select monochrome

C/M

Open

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) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

Note: The location of banks 0 & 1 is unidentified.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

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

JS3

JS4

JS5

JS6

128KB

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

256KB

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU SPEED SELECTION

Speed

JC2

JC3

JF2

JF3

JF5

25MHz

Open

2 & 3

Closed

Closed

Open

33MHz

Open

2 & 3

Open

Closed

Closed

50iMHz

Open

2 & 3

Closed

Closed

Open

50MHz

Closed

1 & 2

Open

Open

Open

66iMHz

Open

2 & 3

Open

Closed

Closed

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Type

JC5

JC6

80486SX

Pins 2 & 3 closed

Open

80487SX

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

ODP487SX

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

80486DX

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

80486DX2

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

VL BUS WAIT STATE SELECTION

Setting

J2

0

Open

 

1

Closed

VL BUS SPEED SELECTION

Speed

J1

<= 33MHz

Open

>33 MHz

Closed