Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	25/33/50(internal)/66(internal)MHz
Chip Set	Unidentified
Maximum Onboard Memory	36MB
Cache	None
BIOS	Unidentified
Dimensions	254mm x 218mm
I/O Options	Floppy drive interfaces (2), IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot, CD-ROM connector
NPU Options	None

CONNECTIONS
Function	Label	Function	Label
PS/2 mouse port	CN1	CD -ROM connector	CN6
Parallel port	CN2	IDE interface	CN7
Serial port 2	CN3	Floppy drive interface	CN8
Serial port 1	CN4	Floppy drive interface	CN9
VGA port	CN5	Riser slot	SL1

USER CONFIGURABLE SETTINGS
Setting		Label	Position
»	Factory configured - do not alter	F1	N/A
	Hard drives installed 1	J2	Closed
	Hard drives installed 2	J2	Open
»	Setup access disabled	J12	Pins 2 & 3 closed
	Setup access enabled	J12	Pins 1 & 2 closed
»	Mouse IRQ12 enabled	J13	Pins 2 & 3 closed
	Mouse IRQ12 disabled	J13	Pins 1 & 2 closed
»	Serial port 1 bootstrap enabled	J21	Pins 2 & 3 closed
	Serial port 1 bootstrap disabled	J21	Pins 1 & 2 closed
»	Serial port 2 bootstrap enabled	J25	Pins 2 & 3 closed
	Serial port 2 bootstrap disabled	J25	Pins 1 & 2 closed
»	Floppy drives not write protected	J33	Pins 2 & 3 closed
	Floppy drives write protected	J33	Pins 1 & 2 closed
»	Factory configured - do not alter	J45	N/A

DRAM
Size	Bank 0	Bank 1
4MB	4MB	None
8MB	4MB	(1) 1M x 36
12MB	4MB	(1) 2M x 36
20MB	4MB	(1) 4M x 36
36MB	4MB	(1) 8M x 36
Note: Bank 0 is factory configured and is not configurable.

CPU TYPE
Setting	J28	J29
80486SX (PQFP)	Pins 1 & 2 closed	Pins 1 & 2 closed
80486SX (PQFP)/80487SX	Pins 1 & 2 closed	Pins 1 & 2 closed
80486SX (PQFP)/80486DX2	Pins 1 & 2 closed	Pins 1 & 2 closed
80486SX (PGA)	Pins 2 & 3 closed	Pins 1 & 2 closed
80487SX	Pins 1 & 2 closed	Pins 1 & 2 closed
80486DX	Pins 1 & 2 closed	Pins 2 & 3 closed
80486DX2	Pins 1 & 2 closed	Pins 2 & 3 closed

CPU SPEED
Setting	J44
25MHz	Closed
33MHz	Open
50iMHz	Closed
66iMHz	Open

VIDEO MEMORY
Size	Bank 0	Bank 1
512KB	512KB	None
1MB	512KB	512KB
Note: Bank 0 is factory installed and is not configurable. The chip sizes are unidentified.

MISCELLANEOUS TECHNICAL NOTE

The location of pin 1 is unidentified.