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486VL.I

UNIDENTIFIED

486VL.I

Processor

80486SX/80487SX/80487SX2/80486DX/80486DX2/Pentium Overdrive

Processor Speed

20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

32MB

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

External battery

JP1

Speaker

JP17

Reset switch

JP14

Power LED & keylock

JP18

Turbo switch

JP15

32-bit VESA local bus slots

SL1 & SL2

Turbo LED

JP16

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

J1

N/A

Factory configured - do not alter

JP2

N/A

Factory configured - do not alter

JP11

N/A

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

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

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

JP12

JP13

64KB

Open

Open

128KB

Closed

pins 1 & 2 closed

256KB

Closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP9

JP10

JP22

JP23

80486SX (PQFP)

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

Closed

Open

80486SX

pins 2 & 3 closed

Open

Open

Closed

80487SX

pins 1 & 2, 3 & 4 closed

pins 2 & 3 closed

Open

Closed

80486DX

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

Open

Closed

80486DX2

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

Open

Closed

Pentium Overdrive

pins 1 & 2, 3 & 4 closed

pins 2 & 3 closed

Open

Closed

CPU SPEED CONFIGURATION

Speed

JP6

JP7

JP8

20MHz

Open

Closed

Closed

25MHz

Closed

Open

Closed

33MHz

Closed

Closed

Open

40MHz

Open

Open

Closed

50iMHz

Closed

Open

Closed

50MHz

Open

Closed

Open

66iMHz

Closed

Closed

Open

VESA WAIT STATE CONFIGURATION

Wait states

JP19

0 wait states

Open

1 wait state

Closed

BUS SPEED CONFIGURATION

CPU speed

JP20

<= 33MHz

Open

> 33MHz

Closed