POWERMATE SX/20 Motherboard Settings and Configuration

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

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POWERMATE SX/20 Motherboard Settings and Configuration

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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
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