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GRAFIKA 3B/KEEN-2531

DTK COMPUTER, INC.

GRAFIKA 3B/KEEN-2531

Processor

80386SX

Processor Speed

25MHz

Chip Set

Unidentified

Max. Onboard DRAM

16MB (8MB on external memory card)

Cache

None

BIOS

DTK

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card (PEI-307)

NPU Options

80387SX/3167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo switch

J4

Speaker

J2

Reset switch

J5

Turbo LED

J3

32-bit system memory card

SL1

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Factory configured - do not alter

SW1/7

Off

Page interleave mode enabled

SW1/8

On

 

Page mode enabled

SW1/8

Off

NPU disabled

W1

pins 2 & 3 closed

 

NPU enabled

W1

pins 1 & 2 closed

 

Monitor type select monochrome

W2

pins 1 & 2 closed

 

Monitor type select color

W2

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

3MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

NONE

4MB (A)

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB (B)

(4) 1M x 9

NONE

NONE

NONE

5MB

(4) 1M x 9

(4) 256K x 9

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

NONE

7MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

NONE

10MB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

13MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

Note: Banks 2 & 3 are located on the external memory card.

DRAM SWITCH CONFIGURATION

Size

SW1/1

SW1/2

SW1/3

SW1/4

Size

Off

On

On

On

1MB

On

Off

On

On

2MB

Off

Off

Off

Off

3MB

Off

On

Off

On

4MB (A)

On

On

On

Off

4MB (B)

Off

Off

Off

Off

5MB

Off

On

Off

On

6MB

On

Off

Off

On

7MB

Off

Off

Off

On

8MB

On

On

On

Off

9MB

Off

On

On

Off

10MB

On

Off

On

Off

12MB

On

On

Off

Off

13MB

Off

On

Off

Off

16MB

On

On

On

On

DRAM WAIT STATE CONFIGURATION

Write wait state

Read wait state

SW1/5

SW1/6

1

2

On

Off

1

3

Off

On

2

3

On

On

CPU SPEED CONFIGURATION

Speed

J4

12.5MHz

pins 1 & 2 closed

Controlled by keyboard

pins 2 & 3 closed

25MHz

Open

DRAM JUMPER CONFIGURATION

Size

W1

W2

W3

W4

W5

W6

W7

1MB

N/A

N/A

Open

N/A

N/A

N/A

N/A

2MB

N/A

N/A

Open

N/A

N/A

N/A

N/A

3MB

2 & 3

N/A

Closed

2 & 3

N/A

2 & 3

N/A

4MB (A)

2 & 3

2 & 3

Open

2 & 3

2 & 3

2 & 3

2 & 3

4MB (B)

N/A

N/A

Closed

N/A

N/A

N/A

N/A

5MB

N/A

N/A

Open

N/A

N/A

N/A

N/A

6MB

2 & 3

N/A

Closed

2 & 3

N/A

2 & 3

N/A

7MB

2 & 3

2 & 3

Closed

2 & 3

2 & 3

2 & 3

2 & 3

8MB

N/A

N/A

Open

N/A

N/A

N/A

N/A

9MB

2 & 3

N/A

Closed

2 & 3

N/A

2 & 3

N/A

10MB

2 & 3

2 & 3

Closed

2 & 3

2 & 3

2 & 3

2 & 3

12MB

1 & 2

N/A

Closed

1 & 2

N/A

1 & 2

N/A

13MB

1 & 2

2 & 3

Closed

1 & 2

2 & 3

1 & 2

2 & 3

16MB

1 & 2

1 & 2

Closed

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position. Banks 0 & 1 are located on the mainboard.