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486DX-33

SILICON VALLEY TECHNOLOGY

486DX-33

Processor

80486SX/80487SX/80486DX

Processor Speed

20/25/33MHz

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo LED

J4

Power LED & keylock

J2

Turbo switch

J5

Speaker

J3

Reset switch

J6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

J9

pins 1 & 2 closed

 

CMOS memory clear

J9

pins 2 & 3 closed

Monitor type select color

W8

Closed

 

Monitor type select monochrome

W8

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

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

32KB

(4) 8K x 8

NONE

(3) 16K x 4

64KB

(4) 8K x 8

(4) 8K x 8

(3) 16K x 4

128KB

(4) 32K x 8

NONE

(3) 16K x 4

256KB

(4) 32K x 8

(4) 32K x 8

(3) 16K x 4

Bank 0 = U2, U6, U10 & U14, Bank 1 = U3, U7, U11 & U15.

CACHE JUMPER CONFIGURATION

Size

W1

W2

W3

W4

W5

32KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

64KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

128KB

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

256KB

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

W12

W13

W14

W16

W17

80486SX

Open

Open

2 & 3

Closed

Open

80487SX

Closed

Closed

1 & 2

Closed

2 & 3

80486DX

Closed

Closed

1 & 2

Closed

1 & 2

Note: Pins designated should be in the closed position.