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SUPERBOARD 486/VLB

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