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





TURBO 640

DTK COMPUTER, INC.

TURBO 640

Processor

8088-2

Processor Speed

8MHz

Chip Set

None

Max. Onboard DRAM

640K

Cache

None

BIOS

DTK/ERSO

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

8087-2

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

JP1

Turbo switch

JP5

Power LED & turbo LED

JP2

Keylock

JP8

Speaker

JP4

   

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Factory configured - do not alter

SW1/switch 1

Off

NPU absent

SW1/switch 2

Off

 

NPU present

SW1/switch 2

On

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

64KB

(9) 4164

NONE

NONE

NONE

128KB

(9) 4164

(9) 4164

NONE

NONE

192KB

(9) 4164

(9) 4164

(9) 4164

NONE

256KB

(9) 4164

(9) 4164

(9) 4164

(9) 4164

256KB

(9) 41256

NONE

NONE

NONE

512KB

(9) 41256

(9) 41256

NONE

NONE

576KB

(9) 41256

(9) 41256

(9) 4164

NONE

640KB

(9) 41256

(9) 41256

(9) 4164

(9) 4164

DRAM JUMPER CONFIGURATION

Size

JPA

JPB

JPC

JPD

JPE

JPF

64KB

Closed

Closed

Open

Open

Open

Closed

128KB

Closed

Closed

Open

Open

Open

Closed

192KB

Closed

Closed

Open

Open

Open

Closed

256KB (using 4164)

Closed

Closed

Open

Open

Open

Closed

256KB (using 41256)

Open

Open

Closed

Closed

Closed

Open

512KB

Open

Open

Closed

Closed

Closed

Open

576KB

Open

Open

Closed

Closed

Closed

Open

640KB

Open

Open

Closed

Closed

Closed

Open

CPU SPEED CONFIGURATION

Setting

JP6

JP7

Switchable from turbo switch

Closed

Open

Switchable from keyboard

Open

Closed

FLOPPY DRIVE CONFIGURATION

Drives installed

SW1/7

SW1/8

1

On

On

2

Off

On

3

On

Off

4

Off

Off

MONITOR CONFIGURATION

Type

SW1/5

SW1/6

EGA or none

On

On

40 x 25 CGA

Off

On

80 x 25 CGA

On

Off

Monochrome

Off

Off