DASH COMPUTER, INC.

DC 386 WB WRITE BACK-CACHE

Processor

80386DX

Processor Speed

25/33/40MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card slot

NPU Options

80387

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J23

Reset switch

SW1

Speaker

J24

Turbo switch

SW2

32-bit external memeory card

S1

Turbo LED

SW3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select monochrome

JP1

open

 

Monitor type select color

JP1

closed

»

CMOS memory normal operation

JP2

pins 2 & 3 closed

 

CMOS memory clear

JP2

pins 1 & 2 closed

»

Bus speed select ATCLK/6

JP3

pins 1 & 2 closed

 

Bus speed select ATCLK/8

JP3

open

Note:Pins 3 and 4 on JP3 are not used

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

CACHE JUMPER CONFIGURATION

Size

JP5

JP6

JP7

JP8

JP9

JP10

32KB

pins 1 & 2

pins 1 & 2

pins 1 & 2

open

pins 2 & 3

pins 2 & 3

64KB

pins 2 & 3

pins 1 & 2

pins 1 & 2

open

pins 2 & 3

pins 1 & 2

128KB

pins 2 & 3

pins 1 & 2

pins 2 & 3

closed

pins 2 & 3

pins 1 & 2

256KB

pins 2 & 3

pins 2 & 3

pins 2 & 3

closed

pins 1 & 2

pins 1 & 2

Note:Pins designated should be in the closed position

CACHE CONFIGURATION

Size

Cache SRAM

Location

TAG (U32 & U33)

Dirty Bit (U42)

32KB

(4) 8K x 8

Bank 0

(2) 4K x 4

(1) 4K x 4

64KB

(8) 8K x 8

Banks 0 & 1

(2) 4K x 4

(1) 4K x 4

128KB

(4) 32K x 8

Bank 0

(2) 16K x 4

(1) 16K x 1

256KB

(8) 32K x 8

Banks 0 & 1

(2) 16K x 4

(1) 16K x 1