Processor	80486SX/80486SX2/80486DX/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	None
BIOS	Unidentified
Dimensions	254mm x 218mm
I/O Options	Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), video pass through connector, VGA port, riser slot
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Video pass through connector	CN1	IDE interface	CN7
PS/2 mouse port	CN2	Floppy drive interface	CN8
Serial port 1	CN3	Front panel connector	CN9
Serial port 2	CN4	Speaker	CN10
Parallel port	CN5	Riser slot	SL1
VGA port	CN6	Reset switch	X31

USER CONFIGURABLE SETTINGS
Function		Label	Position
	On board video enabled	X60	Pins 1 & 2 closed
	On board video disabled	X60	Pins 2 & 3 closed
»	VGA IRQ9 disabled	X161	Pins 1 & 2 closed
	VGA IRQ9 enabled	X161	Pins 2 & 3 closed
»	PS/2 mouse IRQ12 enabled	X162	Pins 1 & 2 closed
	PS/2 mouse IRQ12 disabled	X162	Pins 2 & 3 closed
»	Monitor type select color	X165	Pins 1 & 2 closed
	Monitor type select monochrome	X165	Pins 2 & 3 closed
»	CMOS memory normal operation	X166	Pins 1 & 2 closed
	CMOS memory clear	X166	Pins 2 & 3 closed
	Floppy drive write protect disabled	X192	Pins 1 & 2 closed
	Floppy drive write protect enabled	X192	Pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
4MB	(1) 1M x 36	None
8MB	(1) 2M x 36	None
8MB	(1) 1M x 36	(1) 1M x 36
12MB	(1) 2M x 36	(1) 1M x 36
16MB	(1) 2M x 36	(1) 2M x 36
16MB	(1) 4M x 36	None
24MB	(1) 4M x 36	(1) 2M x 36
32MB	(1) 4M x 36	(1) 4M x 36
32MB	(1) 8M x 36	None

VIDEO MEMORY CONFIGURATION
Size	Bank 0	Bank 1
512KB	512KB	None
1MB	512KB	512KB
Note: The size of the chip is unidentified.

CPU SPEED SELECTION
Speed	X41
25MHz	Pins 1 & 2 closed
33MHz	Pins 2 & 3 closed
50iMHz	Pins 1 & 2 closed
66iMHz	Pins 2 & 3 closed

CPU TYPE SELECTION
Type	X33
80486SX	Pins 1 & 2 closed
80486SX2	Pins 2 & 3 closed
80486DX	Pins 2 & 3 closed
80486DX2	Pins 2 & 3 closed

CPU TYPE SELECTION
Type		X32
»	Write through	Pins 1 & 2 closed
	Write back	Pins 2 & 3 closed

MISCELLANEOUS TECHNICAL NOTE

Note: The location of pin 1 on the connectors are unidentified. Jumpers that are not labeled may be factory configured.