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486L

UNIDENTIFIED

486L

Processor

80486SX/80487SX/80486DX

Processor Speed

20/25/33/50MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 220mm

I/O Options

Local bus slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Reset switch

J16

Power LED & keylock

J13

Turbo LED

J17

Speaker

J14

Local bus slot

SL1

Turbo switch

J15

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Battery type select internal

J1

pins 1 & 2 closed

 

Battery type select external

J1

Closed

Monitor type select color

J2

Closed

 

Monitor type select monochrome

J2

Open

ATCLK select CLKI/6

J3

Closed

 

ATCLK select CLKI/4

J3

Open

 

Phase frequency select single phase

J6

pins 1 & 2 closed

 

Phase frequency select double phase

J6

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

20MB

(4) 1M x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG 0

TAG 1

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

(1) 16K x 4

128KB

(4) 32K x 8

NONE

(1) 8K x 8

(1) 16K x 4

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

(1) 16K x 4

CACHE JUMPER CONFIGURATION

Size

J4

J5

J10

J12

64KB

Open

Open

pins 2 & 3 closed

Open

128KB

Open

Closed

pins 1 & 2 closed

Closed

256KB

Closed

Closed

pins 2 & 3 closed

Closed

CPU TYPE CONFIGURATION

Type

J7

J8

JP10

80486SX

pins 2 & 3 closed

Open

Open

80487SX

pins 1 & 2 closed

Closed

Open

80486DX

pins 1 & 2 closed

Closed

pins 2 & 3 closed

CHIPSET CONFIGURATION

Type

J9

J11

82C495

pins 1 & 2 closed

pins 1 & 2 closed

82C493

pins 2 & 3 closed

pins 2 & 3 closed