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SD 550

SAMSUNG ELECTRONICS, INC.

SD 550

Processor

80286 (exact location unidentified)

Processor Speed

12MHz

Chip Set

Unidentified

Maximum Onboard Memory

1MB

Cache

None

BIOS

Award

Dimensions

406mm x 406mm

I/O Options

Floppy drive interface, parallel port, serial ports (2)

NPU Options

80287 (exact location unidentified)

CONNECTIONS

Function

Label

Function

Label

Serial port

CN11

Power LED & keylock

J13

Serial port

CN12

Speaker

J14

Parallel port

CN13

External battery

J15

Keyboard connector

J11

Floppy drive interface

J17

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Jumper information unavailable

J12

N/A

 

Parallel port enabled

JP11

Closed

 

Parallel port disabled

JP11

Open

 

Floppy drive interface enabled

JP12

Closed

 

Floppy drive interface disabled

JP12

Open

 

Serial port 1 enabled

JP13

Closed

 

Serial port 1 disabled

JP13

Open

 

Serial port 2 enabled

JP14

Closed

 

Serial port 2 disabled

JP14

Open

 

BIOS type select 27256

JP15

Closed

 

BIOS type select 27128

JP15

Open

 

NPU speed select 16MHz

JP17

Pins 1 & 2 closed

 

NPU speed select 25MHz

JP17

Pins 2 & 3 closed

 

Drive type select dual speed

JP19

Closed

 

Drive type select single speed

JP19

Open

 

Precomp value select 187ns

JP20

Closed

 

Precomp value select 125ns

JP20

Open

 

Floppy drive address select secondary

JP22

Closed

 

Floppy drive address select primary

JP22

Open

 

Monitor type select color

SW10

Up

 

Monitor type select monochrome

SW10

Down

DRAM

Size

Bank 0

Bank 1

Bank 2

Bank 3

640KB

(9) 41256

(9) 41256

(9) 4164

(9) 4164

1MB

(9) 41256

(9) 41256

(9) 41256

(9) 41256

Note: The orientation of the banks is unidentified.

DRAM JUMPER

Size

JP16

640KB

Closed

1MB

Open

DRAM WAIT STATE

Setting

JP21

0 wait states

Closed

1 wait state

Open