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POWERMATE SX/20

NEC TECHNOLOGIES, INC.

POWERMATE SX/20

Processor

80386SX

Processor Speed

20MHz

Video Processor

Unidentified

Chipset

NEC

Maximum Onboard Memory

12MB DRAM (8MB on memory card, 2MB on memory module)

Maximum Video Memory

256KB DRAM (exact location unidentified)

BIOS

NEC

Dimensions

254 x 218mm

I/O Options

32-bit memory card slot (2), CPU card slot, PS/2 mouse port, floppy drive interface, IDE interface, parallel port, serial port, VGA daughterboard header

NPU Options

80387SX

Video Types Supported

VGA

Highest Resolution Supported

800 x 600

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

Header to mainboard CN8A

CN8B

Keyboard connector

CN2

DC power out connector

CN9

VGA port

CN3

DC power out connector

CN10

Serial port

CN4

Speaker

CN11

Parallel port

CN5

Front panel connector

CN12

IDE interface

CN6

Memory module header

CN13

Floppy drive interface

CN7

VGA card header

CN14

CPU card header

CN8A

32-bit external memory card

SL2

USER CONFIGURABLE SETTINGS

Function

Label

Position

Password normal operation

J1

Pins 2 & 3 closed

 

Password clear

J1

Pins 1 & 2 closed

IDE interface enabled

J2

Pins 2 & 3 closed

 

IDE interface disabled

J2

Pins 1 & 2 closed

Serial port interrupt set to IRQ4

J3

Pins 2 & 3 closed

 

Serial port interrupt set to IRQ3

J3

Pins 1 & 2 closed

Monitor type select color

SW1/1

On

 

Monitor type select monochrome

SW1/1

Off

Floppy controller address set to 370h

SW1/2

On

 

Floppy controller address set to 270h

SW1/2

Off

Floppy drive interface enabled

SW1/3

On

 

Floppy drive interface disabled

SW1/3

Off

Serial port address set to 3F8h (COM1:)

SW1/4

On

 

Serial port address set to 2F8h (COM2:)

SW1/4

Off

Serial port enabled

SW1/5

On

 

Serial port disabled

SW1/5

Off

Parallel port enabled

SW1/6

On

 

Parallel port disabled

SW1/6

Off

Keyboard D1 signal intercepted

SW1/7

On

 

Keyboard D1 signal not intercepted

SW1/7

Off

Memory from 512KB to 640KB enabled

SW1/9

Off

 

Memory from 512KB to 640KB disabled

SW1/9

On

Mouse port enabled

SW1/10

On

 

Mouse port disabled

SW1/10

Off

ON-BOARD VIDEO CONFIGURATION

Setting

J8

SW1/8

Disabled

Pins 1 & 2 closed

Off

 

Enabled

Pins 2 & 3 closed

On

DRAM CONFIGURATION

There is 2MB of DRAM installed on the mainboard. This memory is not configurable.

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

SW1/5

Off

Factory configured - do not alter

SW1/6

Off

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

2MB

(2) 1M x 9

None

None

None

4MB

(2) 1M x 9

(2) 1M x 9

None

None

6MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

None

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

DRAM SWITCH CONFIGURATION

Size

SW1/1

SW1/2

SW1/3

SW1/4

2MB

On

Off

Off

Off

4MB

On

On

Off

Off

6MB

On

On

On

Off

8MB

On

On

On

On