HwMuseum | Index

DTK COMPUTER, INC.

PTM-1261C/1661C

Processor

80286

Processor Speed

12/16MHz

Chip Set

C & T

Max. Onboard DRAM

5MB

Cache

None

BIOS

DTK

Dimensions

333mm x 222mm

I/O Options

Floppy drive interface, game port, IDE interface, parallel port, PS/2 mouse interface, serial ports (2)

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

External battery

J9

Turbo LED

J2

Serial port 2

J10

Reset switch

J3

Serial port 1

J11

Turbo switch

J4

Parallel port

J12

IDE interface

J5

PS/2 mouse interface

J13

Floppy drive interface

J6

IDE interface LED

W12

Game port

J7

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

IDE type select new standard

W11

pins 2 & 3 closed

 

IDE type select original standard (i.e., CP-342)

W11

pins 1 & 2 closed

»

Floppy drive interface (J6) enabled

W14

Closed

 

Floppy drive interface (J6) disabled

W14

Open

»

IDE interface enabled

W21

Closed

 

IDE interface disabled

W21

Open

»

Game port enabled

W22

Closed

 

Game port disabled

W22

Open

»

Monitor type select monochrome

W23

Open

 

Monitor type select color

W23

Closed

»

Battery select internal

W24

pins 2 & 3 closed

 

Battery select external

W24

pins 1 & 2 closed

»

Power good signal detect from power supply

W25

pins 2 & 3 closed

 

Power good signal detect from board

W25

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

P-0

Bank 1

P-1

Bank 2

Bank 3

512KB

(4) 44256

(2) 41256

NONE

NONE

NONE

NONE

640KB

(4) 44256

(2) 41256

(2) 64K x 9

NONE

NONE

NONE

1MB

(4) 44256

(2) 41256

(4) 44256

(2) 41256

NONE

NONE

1.5MB

(4) 44256

(2) 41256

(4) 44256

(2) 41256

(2) 256K x 9

NONE

2MB

(4) 44256

(2) 41256

(4) 44256

(2) 41256

(2) 256K x 9

(2) 256K x 9

2MB

NONE

NONE

NONE

NONE

(2) 1M x 9

NONE

3MB

(4) 44256

(2) 41256

(4) 44256

(2) 41256

(2) 1M x 9

NONE

4MB

NONE

NONE

NONE

NONE

(2) 1M x 9

(2) 1M x 9

5MB

(4) 44256

(2) 41256

(4) 44256

(2) 41256

(2) 1M x 9

(2) 1M x 9

DRAM JUMPER CONFIGURATION

Size

W1

W2

W3

W4

W5

W6

512KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

640KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1MB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1.5MB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2MB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2MB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

3MB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

4MB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

5MB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Notes:Pins designated should be in the closed position.

PARALLEL PORT CONFIGURATION

Setting

W13

W19

W20

LPT1

pins 1 & 2 closed

Closed

Closed

LPT2

pins 2 & 3 closed

Open

Open

Disabled

N/A

Open

Closed

Disabled

N/A

Closed

Open

SERIAL PORT 1 CONFIGURATION

Setting

W13

W15

W16

COM1

pins 1 & 2 closed

Closed

Closed

COM3

pins 2 & 3 closed

Open

Open

Disabled

N/A

Open

Closed

Disabled

N/A

Closed

Open

SERIAL PORT 2 CONFIGURATION

Setting

W13

W17

W18

COM2

pins 1 & 2 closed

Closed

Closed

COM4

pins 2 & 3 closed

Open

Open

Disabled

N/A

Open

Closed

Disabled

N/A

Closed

Open