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S26361-D756-X

SIEMENS NIXDORF INFORMATIONSSYSTEME AG

S26361-D756-X

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

25/33/50(internal)/66(internal)MHz

Chip Set

Unidentified

Video Chip Set

Unidentified

Maximum Onboard Memory

32MB

Maximum Video Memory

1MB

Cache

64/128/256KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), video feature connector, VGA port, riser slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Front panel connector

CN1

Serial port 2

J20

Speaker

J13

Parallel port

J21

PS/2 mouse port

J15

Video feature connector

J23

IDE interface

J17

VGA port

J24

Floppy drive interface

J18

External battery

JP8

Serial port 1

J19

Riser slot

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

Internal battery enabled

JP8

Pins 1 & 2 closed

 

Internal battery disabled (CMOS memory clear)

JP8

Pins 2 & 3 closed

Monitor type select color

JP10

Open

 

Monitor type select monochrome

JP10

Closed

PS/2 mouse IRQ12 enabled

JP11

Closed

 

PS/2 mouse IRQ12 disabled

JP11

Open

On board video enabled

JP25

Pins 1 & 2 closed

 

On board video disabled

JP25

Pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

4MB

(4) 1M x 9

None

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 CONFIGURATION

Size

Bank 0

Bank 1

64KB

(4) 8K x 8

(4) 8K x 8

128KB

(4) 32K x 8

None

256KB

(4) 32K x 8

(4) 32K x 8

Note: The locations of banks 0 & 1 are unidentified.

CACHE TAG CONFIGURATION

Size

U48

U49

U50

64KB

(1) 8K x 8

None

(1) 16K x 8

128KB

(1) 8K x 8

None

(1) 16K x 8

256KB

(1) 8K x 8

(1) 8K x 8

(1) 16K x 8

Note: The locations of U48, U49 & U50 are unidentified.

CACHE JUMPER CONFIGURATION

Size

JP12

JP13

JP14

JP15

JP16

JP17

None

2 & 3

2 & 3

Open

Open

Open

Open

64KB

2 & 3

2 & 3

Open

Open

Open

Open

128KB

1 & 2

1 & 2

Closed

Open

Open

Closed

256KB

2 & 3

2 & 3

Closed

Closed

Closed

Closed

Note: Pins designated should be in the closed position.

VIDEO MEMORY CONFIGURATION

Size

Bank 0

Bank 1

512KB

512KB

None

1MB

512KB

512KB

Note: The chips sizes are unidentified.

CPU SPEED SELECTION

Speed

JP5

JP6

25MHz

Closed

Open

33MHz

Open

Closed

50iMHz

Closed

Open

66iMHz

Open

Closed

CPU TYPE SELECTION

Type

JP1

JP2

JP3

80486SX

Open

Pins 1 & 2 closed

Open

80487SX

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

80486DX

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

80486DX2

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Note: If upgrade socket is filled, JP1 must be open.

MISCELLANEOUS TECHNICAL NOTE

Note: The location of pin 1 on the jumpers and connectors are unidentified.