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CLT486VL2 486AT MOTHERBOARD

VISIONEX

CLT486VL2 486AT MOTHERBOARD

MSI 486VL2 486 VESA L.B. / ISA

Processor

80486SX/80487SX/ODP486/80486DX/80486DX2

Processor Speed

20/25/33/50(internal)/50/66(internal)MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

32MB

Maximum Video Memory

None

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

JP10

External battery

JP17

Speaker

JP11

Turbo switch

JP95

Power LED & keylock

JP13

32-bit VESA local bus slots

SL1 & SL2

Reset switch

JP15

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

PQFP CPU disabled

JP1

Closed

 

PQFP CPU enabled

JP1

Open

 

Monitor type select CGA/EGA/PGA/VGA

JP12

Closed

 

Monitor type select monochrome

JP12

Open

CMOS memory normal operation

JP16

Pins 1 & 2 closed

 

CMOS memory clear

JP16

Pins 2 & 3 closed

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

17MB

(4) 256K x 9

(4) 4M x 9

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

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/32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP7

JP8

64KB

Pins 2 & 3 closed

Pins 2 & 4 closed

128KB

Pins 1 & 2 closed

Pins 2 & 3 closed

256KB

Pins 1 & 2 closed

Pins 1 & 2 closed

CPU SPEED SELECTION

Speed

ID3

JP33

JP72

20MHz

Open

Pins 2 & 4 closed

Closed

25MHz

Open

Pins 2 & 4 closed

Closed

33MHz

Open

Pins 2 & 4 closed

Open

50iMHz

Open

Pins 2 & 4 closed

Closed

50MHz

Closed

Pins 1 & 2 closed

Open

66iMHz

Open

Pins 2 & 4 closed

Open

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Type

JP2

JP3

JP4

80486SX (PQFP)

Open

Open

Open

80486SX (PGA)

Pins 2 & 3 closed

Open

Open

80487SX

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

Closed

ODP486

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

Open

80486DX

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

Open

80486DX2

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

Open

Note: The location of the PQFP is unidentified.

VL BUS WAIT STATE SELECTION

Setting

ID2

0

Open

1

Closed