MIDSIZE 486 ISA/VL SYSTEMS Motherboard Settings and Configuration

Processor	80486SX/80486SX2/80486DX2/80486DX4
Processor Speed	25/33/50(internal)/66(internal)/100(internal)MHz
Chip Set	VLSI
Video Chip Set	None
Maximum Onboard Memory	64MB
Maximum Video Memory	None
Cache	128KB
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slot, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), feature connector, VGA port, riser slot
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	BATT	IDE interface	CN7
PS/2 mouse port	CN1	Floppy drive interface	CN8
Serial port 1	CN2	IDE interface LED	CN9
Serial port 2	CN3	Front panel connector	PANEL
Parallel port	CN4	Riser slot	SL1
VGA port	CN5	32-bit VESA local bus slot	SL2
Feature connector	CN6	Speaker	SPKR

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	CDR	Open
»	Password enabled	EPWD	Closed
	Password disabled	EPWD	Open
»	On board video enabled	EVGA	Closed
	On board video disabled	EVGA	Open
»	Factory configured - do not alter	IDEIRQ	Pins 1 & 2 closed
»	Factory configured - do not alter	IDERDY	Open
»	On board speaker enabled	SPKR	Pins 1 & 2 closed
	On board speaker disabled	SPKR	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1
4MB	(1) 1M x 36	None
8MB	(1) 1M x 36	(1) 1M x 36
8MB	(1) 2M x 36	None
12MB	(1) 1M x 36	(1) 2M x 36
16MB	(1) 2M x 36	(1) 2M x 36
16MB	(1) 4M x 36	None
20MB	(1) 4M x 36	(1) 1M x 36
24MB	(1) 4M x 36	(1) 2M x 36
32MB	(1) 4M x 36	(1) 4M x 36
32MB	(1) 8M x 36	None
36MB	(1) 1M x 36	(1) 8M x 36
40MB	(1) 8M x 36	(1) 2M x 36
48MB	(1) 4M x 36	(1) 8M x 36
64MB	(1) 8M x 36	(1) 8M x 36
Note: Board also accepts x 32 SIMMs.

CACHE CONFIGURATION
Size	Bank 0	TAG	U55/U57
128KB	(4) 32K x 8	Unidentified	Unidentified
Note: The size of TAG chip and U55/U57 are unidentified.

CPU SPEED SELECTION
Speed	SPEED
25MHz	Closed
33MHz	Open
50iMHz	Closed
66iMHz	Open
100iMHz	Open