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OPTI 3486

ZIDA TECHNOLOGIES, LTD.

OPTI 3486

Processor

80386DX/80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256KB

BIOS

AMI

Dimensions

220mm x 220mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

J1

Speaker

J4

Turbo LED

J3

Power LED & keylock

J5

Note:The Locations of connectors J1, J3, J4, and J5 are unknown.

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

P2

Unknown

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) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

SRAM CONFIGURATION

Size

Cache

Location

TAG

64KB

(8) 8K x 8

Banks 0 & 1

(1) 8K x 8

128KB

(4) 32K x 8

Bank 0

(1) 8K x 8

256KB

(8) 32K x 8

Banks 0 & 1

(1) 32K x 8

SRAM JUMPER CONFIGURATION

Size

P3

P5

P6

P7

P8

P9

64KB

pins 2 & 3 closed

Open

Open

Open

Open

Open

128KB

pins 1 & 2 closed

Open

Open

Closed

Closed

Closed

256KB

pins 2 & 3 closed

Closed

Closed

Closed

Closed

Closed

CONFIGURATION FOR 80386DX CPU

Jumper

33MHz

40MHz

P4

pins 1 & 2 closed

pins 1 & 2 closed

P12

N/A

N/A

P13

N/A

N/A

P14

N/A

N/A

P25

pins 2 & 3 closed

pins 2 & 3 closed

P28

Open

Open

P30

Closed

Open

P31

Closed

Open

P32

Open

Closed

P33

Open

Open

P39

Closed

Open

P97

Closed

Closed

P100

pins 1 & 2 closed

pins 1 & 2 closed

CONFIGURATION FOR 80486SX, 80486DX & 80486DX2 CPU

Jumper

20MHz

25MHz

33MHz

50iMHz

50MHz

66iMHz

P4

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

P12

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

P13

Open

Open

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

P14

Open

Open

Closed

Closed

Closed

Closed

P25

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

P28

Closed

Closed

Closed

Closed

Closed

CLosed

P30

Open

Closed

Closed

Closed

Closed

Closed

P31

Closed

Open

Closed

Open

Open

Closed

P32

Closed

Closed

Open

Closed

Closed

Open

P33

Closed

Closed

Closed

Closed

Closed

Closed

P39

N/A

N/A

N/A

N/A

N/A

N/A

P97

Open

Open

Open

Open

Closed

Open

P100

pins 2 & 3

pins 2 & 3

pins 2 & 3

pina 2 & 3

pins 2 & 3

pins 2 & 3

Note:Pins designated should be in the closed position.

Location of jumpers P30, P31, P32 and P97 are unknown.