Processor	80486SX/80486SX2/80487SX/486 Overdrive/80486DX/80486DX2
Processor Speed	25/33/50(internal)/66(internal)MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	128MB
Maximum Video Memory	None
Cache	128/256KB
BIOS	IBM
Dimensions	330mm x 218mm
I/O Options	32-bit VESA/PCI local bus slot, floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2),VESA feature connector, VGA port, riser slot
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
PS/2 mouse port	J2	VESA feature connector	J14
Serial port 1	J3	LED connector	J26
Serial port 2	J4	Speaker	J27
Parallel port	J5	On/off switch connector	J29
VGA port	J6	On/off switch power supply connector	J30
Floppy drive interface	J7	Riser slot	SL1
IDE interface 1	J9	32-bit VESA/PCI local bus slot	SL2
IDE interface 2	J10

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	On board video enabled	J15	Pins 1 & 2 closed
	On board video disabled	J15	Pins 2 & 3 closed
»	Modem answers on ring	JP5	Pins 2 & 3 closed
	Modem does not answer on ring	JP5	Pins 1 & 2 closed
	Factory configured - do not alter	JP10	Unidentified
»	CMOS memory normal operation	JP14	Pins 1 & 2 closed
	CMOS memory clear	JP14	Pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
2MB	(1) 512K x 36	None	None	None
4MB	(1) 1M x 36	None	None	None
6MB	(1) 512K x 36	(1) 1M x 36	None	None
8MB	(1) 1M x 36	(1) 1M x 36	None	None
8MB	(1) 2M x 36	None	None	None
10MB	(1) 512K x 36	(1) 512K x 36	(1) 1M x 36	None
12MB	(1) 512K x 36	(1) 512K x 36	(1) 2M x 36	None
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	None
12MB	(1) 1M x 36	(1) 2M x 36	None	None
16MB	(1) 4M x 36	None	None	None
16MB	(1) 1M x 36	(1) 1M x 36	(1) 2M x 36	None
16MB	(1) 2M x 36	(1) 2M x 36	None	None
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
20MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	None
20MB	(1) 1M x 36	(1) 4M x 36	None	None
24MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	None
24MB	(1) 1M x 36	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36
24MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	None
28MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
28MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	(1) 1M x 36

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
32MB	(1) 4M x 36	None	None	None
32MB	(1) 8M x 36	(1) 2M x 36	None	None
32MB	(1) 2M x 36	(1) 2M x 36	(1) 4M x 36	None
32MB	(1) 2M x 36	(1) 4M x 36	(1) 2M x 36	None
36MB	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36	None
40MB	(1) 1M x 36	(1) 1M x 36	(1) 8M x 36	None
40MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	None
48MB	(1) 2M x 36	(1) 2M x 36	(1) 8M x 36	None
48MB	(1) 2M x 36	(1) 2M x 36	(1) 4M x 36	(1) 4M x 36
52MB	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
64MB	(1) 8M x 36	(1) 8M x 36	None	None
64MB	(1) 4M x 36	(1) 4M x 36	(1) 8M x 36	None
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
68MB	(1) 1M x 36	(1) 8M x 36	(1) 4M x 36	(1) 4M x 36
72MB	(1) 1M x 36	(1) 1M x 36	(1) 8M x 36	(1) 8M x 36
80MB	(1) 2M x 36	(1) 2M x 36	(1) 8M x 36	(1) 8M x 36
84MB	(1) 1M x 36	(1) 8M x 36	(1) 8M x 36	(1) 4M x 36
96MB	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36	None
96MB	(1) 4M x 36	(1) 4M x 36	(1) 8M x 36	(1) 8M x 36
100MB	(1) 1M x 36	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36
128MB	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36

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

CACHE JUMPER CONFIGURATION
Size	J16	J17	J38
128KB	Pins 2 & 3 closed	Open	Open
256KB	Pins 1 & 2 closed	Closed	Open

CPU SPEED SELECTION
Speed	J35	J36	J37
25MHz	Open	Closed	Closed
33MHz	Open	Closed	Open
50iMHz	Open	Closed	Closed
50MHz	Open	Open	Open
66iMHz	Open	Closed	Open

CPU TYPE SELECTION
Type	J23	J24
80486SX	Pins 1 & 2 closed	Open
80486SX2	Pins 2 & 3 closed	Open
80487SX	Pins 2 & 3 closed	Closed
486 Overdrive	Pins 2 & 3 closed	Closed
80486DX	Pins 2 & 3 closed	Open
80486DX2	Pins 2 & 3 closed	Open

LOCAL BUS SELECTION
Setting	JP3	JP4	JP7	JP13
VESA local bus	Pins 1 & 2 closed	Pins 1 & 2 closed	Unidentified	Unidentified
PCI local bus	Pins 2 & 3 closed	Pins 2 & 3 closed	Unidentified	Unidentified