486 VESA SYSTEM (VER. 2) Motherboard Settings and Configuration

Processor	80486SX/80486DX/80486DX2
Processor Speed	20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	64MB
Maximum Video Memory	None
Cache	128/256KB
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (2), floppy drive interface, IDE interface, SCSI connector, parallel port, PS/2 mouse port, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
PS/2 mouse port	CN1	IDE interface	CN8
HDD/FDD power connector for EPA	CN2	VGA control connector for EPA	J4
SCSI interface	CN3	Chassis fan power	J9
Parallel port	CN4	Front panel LEDs	J10
Serial port 1	CN5	Auxiliary keyboard/PS/2 mouse	J11
Serial port 2	CN6	IDE interface LED	J12
Floppy drive interface	CN7	32-bit VESA local bus slots	SL1 & SL2

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Jumper information unavailable	CN9	Unidentified
»	Password check disabled	JP1	Pins 2 & 3 closed
	Password check enabled	JP1	Pins 1 & 2 closed
	Jumper information unavailable	JP2	Unidentified
	SCSI IRQ select IRQ10	JP3	Pins 1 & 2 closed
	SCSI IRQ select IRQ11	JP3	Pins 2 & 3 closed
	SCSI IRQ disabled	JP3	Open
»	Factory configured - do not alter	JP4	Open
»	Factory configured - do not alter	JP5	Open
	SCSI I/O address select 340h - 35Fh	JP6	Open
	SCSI I/O address select 140h - 15Fh	JP6	Closed
	Onboard M5105 disabled	JP7	Open
	Onboard M5105 enabled	JP7	Closed
»	Parallel port bidirectional enabled	JP8	Closed
	Parallel port bidirectional disabled	JP8	Open
	Battery type select internal	JP9	Closed
	Battery type select external	JP9	Open
	Reset button disabled	JP23	Open
	Reset button enabled	JP23	Closed
	Keylock enabled	JP24	Open
	Keylock disabled	JP24	Closed

DRAM CONFIGURATION
Size	Bank 0A	Bank 0	Bank 1	Bank 2	Bank 3
4MB	4MB	None	None	None	None
8MB	4MB	None	(1) 1M x 36	None	None
12MB	4MB	None	(1) 1M x 36	(1) 1M x 36	None
16MB (A)	4MB	None	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB (B)	4MB	(1) 4M x 36	None	None	None
20MB	4MB	None	(1) 4M x 36	None	None
24MB	4MB	None	(1) 1M x 36	(1) 4M x 36	None
32MB	4MB	(1) 4M x 36	(1) 4M x 36	None	None
36MB	4MB	None	(1) 4M x 36	(1) 4M x 36	None
40MB	4MB	None	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36
48MB	4MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	None
64MB	4MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
Note: If Bank 0 is populated, Bank 0A needs to be disabled with JP15..

DRAM JUMPER CONFIGURATION
Size	JP15
4MB	Pins 2 & 3 closed
8MB	Pins 2 & 3 closed
12MB	Pins 2 & 3 closed
16MB (A)	Pins 2 & 3 closed
16MB (B)	Pins 1 & 2 closed
20MB	Pins 2 & 3 closed
24MB	Pins 2 & 3 closed
32MB	Pins 1 & 2 closed
36MB	Pins 2 & 3 closed
40MB	Pins 2 & 3 closed
48MB	Pins 1 & 2 closed
64MB	Pins 1 & 2 closed

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
128KB	(4) 32K x 8	None	(1) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP20	JP21	JP22
128KB	Pins 1 & 2 closed	Closed	Open
256KB	Pins 2 & 3 closed	Closed	Closed

CPU SPEED SELECTION
Speed	JP10
20MHz	Pins 1 & 6 closed
25MHz	Pins 2 & 7 closed
33MHz	Pins 3 & 8 closed
40MHz	Pins 4 & 9 closed
50iMHz	Pins 2 & 7 closed
50MHz	Pins 5 & 10 closed
66iMHz	Pins 3 & 8 closed

VL BUS WAIT STATE SELECTION
Setting		JP11
»	0	Open
	1	Closed