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ISA-S486B

UNIDENTIFIED

ISA-S486B

Processor

80486SX/80486DX/80486DX2

Processor Speed

16/20/25/33/50(internal)/50MHz

Chip Set

Symphony

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

JP5

Speaker

JP16

Turbo switch

JP10

Reset switch

JP19

Turbo LED

JP11

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Factory configured - do not alter

JP1

N/A

»

Factory configured - do not alter

JP2

N/A

»

Factory configured - do not alter

JP3

N/A

»

Monitor type select color

JP6

Closed

 

Monitor type select monochrome

JP6

Open

»

Factory configured - do not alter

JP8

N/A

»

Factory configured - do not alter

JP9

N/A

»

Factory configured - do not alter

JP33

N/A

»

Factory configured - do not alter

JP35

N/A

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

5MB

(4) 1M x 9

(4) 256K x 9

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 4M x 9

(4) 256K x 9

17MB

(4) 256K x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

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

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP22

JP23

JP34

64KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

128KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

CACHE JUMPER CONFIGURATION (CON’T)

Size

JP100

JP101

64KB

pins 1 & 3, 5 & 7, 9 & 11, 13 & 15 closed

pins 1 & 3, 5 & 7, 9 & 11, 13 & 15 closed

128KB

pins 2 & 4, 6 & 8, 10 & 12, 14 & 16 closed

pins 2 & 4, 6 & 8, 10 & 12, 14 & 16 closed

256KB

pins 1 & 3, 5 & 7, 9 & 11, 13 & 15 closed

pins 1 & 3, 5 & 7, 9 & 11, 13 & 15 closed

CPU TYPE CONFIGURATION

Type

JP12

JP13

JP14

80486SX

Open

pins 2 & 3 closed

Open

80486DX

Closed

pins 1 & 2 closed

Closed