...because we can't all be on the bleeding edge...





486WB WRITEBACK-CACHE SYSTEM BOARD

DASH COMPUTER, INC.

486WB WRITEBACK-CACHE SYSTEM BOARD

Processor

80486SX/80486DX

Processor Speed

33/50MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/256KB

BIOS

AMI

Dimensions

330mm x 220mm

I/O Options

32-bit external memory card slot

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J11

32-bit external memory card

S1

Power LED & keylock

J23

Reset switch

SW1

Speaker

J24

Turbo switch

SW2

Turbo LED

JP11

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP1

pins 2 & 3 closed

 

CMOS memory clear

JP1

pins 1 & 2 closed

Monitor type select color

JP2

closed

 

Monitor type select monochrome

JP2

open

Factory configured - do not alter

JP7

open

CPU speed select OSC/2

JP8

pins 2 & 3 closed

 

CPU speed select OSC/1

JP8

pins 1 & 2 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

5MB

(4) 256K x 9

(4) 1M x 9

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

CPU JUMPER CONFIGURATION

CPU

JP3

JP4

JP5

80486DX

pins 2 & 3 closed

closed

pins 1 & 2 closed

80486SX

open

open

pins 2 & 3 closed

CACHE JUMPER CONFIGURATION

Size

JP6

JP9

JP10

JP12

64KB

pins 2 & 3 closed

open

open

open

128KB

pins 1 & 2 closed

open

closed

closed

256KB

pins 2 & 3 closed

open

closed

closed

CACHE CONFIGURATION

Size

Cache

Location

TAG

64KB

(8) 8K x 8

Banks 0 & 1

NONE

128KB

(4) 32K x 8

Banks 0

(1) 8K x 8

256KB

(8) 32K x 8

Banks 0 & 1

(1) 8K x 8