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OPTI 486-33 AT

ARTEK COMPUTER SYSTEMS, INC.

OPTI 486-33 AT

Processor

80486SX/80486DX

Processor Speed

20/25/33MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256/512KB

BIOS

AMI/MR

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1 pins 1 & 4

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 (internal battery)

J1

pins 2 & 3 closed

 

CMOS memory normal operation (external battery)

J1

Closed

 

CMOS memory clear

J1

pins 3 & 4 closed

Bus speed select iOSC/6

JP7

Open

 

Bus speed select iOSC/8

JP7

Closed

Monitor type select color

JP12

Closed

 

Monitor type select monochrome

JP12

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

4MB

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U41)

TAG (U57)

64KB

(8) 8K x 8

NONE

(1) 8K x 8

(1) 64K x 1

128KB

(8) 8K x 8

(8) 8K x 8

(1) 8K x 8

(1) 64K x 1

256KB

(8) 32K x 8

NONE

(1) 32K x 8

(1) 64K x 1

512KB

(8) 32K x 8

(8) 32K x 8

(1) 32K x 8

(1) 64K x 1

CACHE JUMPER CONFIGURATION

Size

JP6

JP8

JP9

JP10

JP11

64KB

pins 2 & 3 closed

Open

Open

Open

Open

128KB

pins 2 & 3 closed

Open

Closed

Open

Closed

256KB

pins 2 & 3 closed

Open

Closed

Closed

Closed

512KB

pins 1 & 2 closed

Closed

Closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP2

JP3

JP4

80486SX

Open

pins 1 & 2 closed

Open

80486DX

pins 1 & 2 closed

pins 2 & 3 closed

Closed