HwMuseum | Index

ORCHID TECHNOLOGY

SUPERBOARD 486/VLB

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J23

32-bit VESA local bus slots

S1 - S2

Speaker

J24

Reset switch

SW1

Turbo LED

JP12

Turbo switch

SW2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

JP1

Open

 

Monitor type select monochrome

JP1

Closed

»

CMOS memory normal operation

JP2

pins 2 & 3 closed

 

CMOS memory clear

JP2

pins 1 & 2 closed

»

Factory configured - do not alter

JP14

N/A

»

Factory configured - do not alter (VESA host select 80486)

JP15

Closed

»

Factory configured - do not alter (VESA host select 80486)

JP16

Open

»

VESA high speed write wait state select one

JP17

Closed

 

VESA high speed write wait state select zero

JP17

Open

»

CPU speed select > 33MHz

JP18

Closed

 

CPU speed select £ 33MHz

JP18

Open

»

Factory configured - do not alter

JP19

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

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

CPU TYPE CONFIGURATION

Type

Oscillator

JP4

JP5

JP6

JP7

80486SX-20MHz

20MHz

1 & 2

Open

2 & 3

Open

80486SX-20MHz

40MHz

2 & 3

Open

2 & 3

Open

80486SX-25MHz

25MHz

1 & 2

Open

2 & 3

Open

80486SX-25MHz

50MHz

2 & 3

Open

2 & 3

Open

ODP486SX-25MHz

25MHz

1 & 2

Open

2 & 3

Open

ODP486SX-25MHz

50MHz

2 & 3

Open

2 & 3

Open

80486DX-25MHz

25MHz

1 & 2

2 & 3

1 & 2

Closed

80486DX-33MHz

66MHz

2 & 3

2 & 3

1 & 2

Closed

80486DX-50MHz

50MHz

1 & 2

2 & 3

1 & 2

Closed

80486DX2-50MHz

25MHz

1 & 2

2 & 3

1 & 2

Closed

80486DX2-50MHz

50MHz

2 & 3

2 & 3

1 & 2

Closed

80486DX2-66MHz

66MHz

2 & 3

2 & 3

1 & 2

Closed

Note: Pins designated should be in the closed position.

CACHE CONFIGURATION

Size

Bank 0

64KB

(9) 8K x 8

256KB

(9) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP8

JP9

JP10

JP11

64KB

Open

Open

Open

Open

256KB

Closed

Closed

Open

Closed