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S1-486

SQUARE ONE INDUSTRIES, INC.

S1-486

Processor

80486SX/80486DX/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 external memory card slot

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

32-bit external memory card

CN1

Turbo LED

JP12

External battery

J10

Reset switch

SW1

Power LED & keylock

J23

Turbo switch

SW2

Speaker

J24

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP1

Closed

 

Monitor type select monochrome

JP1

Open

CMOS memory normal operation

JP2

pins 2 & 3 closed

 

CMOS memory clear

JP2

pins 1 & 2 closed

Bus speed select CLK2/6

JP3

Closed

 

Bus speed select CLK2/4

JP3

Open

CPU oscillator select single phase

JP4

pins 1 & 2 closed

 

CPU oscillator select double phase

JP4

pins 2 & 3 closed

Factory configured - do not alter

JP10

Open

Factory configured - do not alter

JP13

Open

Factory configured - do not alter

JP14

Open

Note:Jumper JP3 may not be present on all board revisions.

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

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

64KB

(8) 8K x 8

256KB

(8) 32K x 8

Note:TAG is not user configurable.

CACHE JUMPER CONFIGURATION

Size

JP8

JP9

JP11

64KB

Open

Open

Open

256KB

Closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP5

JP6

JP7

80486SX

Open

pins 2 & 3 closed

Open

80486DX

pins 2 & 3 closed

pins 1 & 2 closed

Closed

80486DX2

pins 2 & 3 closed

pins 1 & 2 closed

Closed