486EI VESA/EISA (VER. 1.0) Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2/P23/P24T
Processor Speed	20/25/33/50(internal)/50/66(internal)MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	256MB
Maximum Video Memory	None
Cache	64/128/256/512KB
BIOS	AMI/Phoenix
Dimensions	332mm x 221mm
I/O Options	32-bit VESA local bus slots (3)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	J6	Turbo switch	J22
Speaker	J8	Turbo LED	J24
Power LED & keylock	J9	32-bit VESA local bus slots	SL1 - SL3

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Monitor type select color	J7	Closed
	Monitor type select monochrome	J7	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(1) 256K x 36	None	None	None
2MB	(1) 256K x 36	(1) 256K x 36	None	None
2MB	(1) 512K x 36	None	None	None
4MB	(1) 256K x 36	(1) 256K x 36	(1) 512K x 36	None
4MB	(1) 512K x 36	None	(1) 512K x 36	None
4MB	(1) 1M x 36	None	None	None
6MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	None
6MB	(1) 512K x 36	None	(1) 1M x 36	None
8MB	(1) 1M x 36	(1) 1M x 36	None	None
8MB	(1) 2M x 36	None	None	None
10MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36
10MB	(1) 512K x 36	None	(1) 1M x 36	(1) 1M x 36
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	None
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 2M x 36	None	(1) 2M x 36	None
16MB	(1) 4M x 36	None	None	None
18MB	(1) 256K x 36	(1) 256K x 36	(1) 4M x 36	None
18MB	(1) 512K x 36	None	(1) 4M x 36	None
20MB	(1) 1M x 36	(1) 4M x 36	None	None
24MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	None
32MB	(1) 4M x 36	(1) 4M x 36	None	None
34MB	(1) 512K x 36	None	(1) 4M x 36	(1) 4M x 36
36MB	(1) 1M x 36	(1) 4M x 36	(1) 4M 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
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
64MB	(1) 16M x 36	None	None	None
128MB	(1) 16M x 36	(1) 16M x 36	None	None
192MB	(1) 16M x 36	(1) 16M x 36	(1) 16M x 36	None
256MB	(1) 16M x 36	(1) 16M x 36	(1) 16M x 36	(1) 16M x 36
Note: The location of banks 0 & 1 are unidentified.

CACHE CONFIGURATION
Size	Bank 0	Bank 1
64KB	(4) 8K x 8	(4) 8K x 8
128KB	(4) 32K x 8	None
256KB	(4) 32K x 8	(4) 32K x 8
512KB	(4) 128K x 8	None
Note: The location of banks 0 & 1 are unidentified.

CACHE JUMPER CONFIGURATION
Size	JC1	JC2	JC3	JC4	JC5	JC6	JC7	JC9
64KB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	2 & 3
128KB	2 & 3	2 & 3	1 & 2	1 & 2	1 & 2	1 & 2	2 & 3	1 & 2
256KB	2 & 3	2 & 3	2 & 3	1 & 2	1 & 2	2 & 3	2 & 3	4 & 5
512KB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	1 & 2
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION
Speed	JL2	JO1	JO2	JO3	JO4
20MHz	Open	Open	Closed	Closed	Closed
25MHz	Open	Closed	Open	Closed	Closed
33MHz	Open	Closed	Closed	Open	Closed
50iMHz	Open	Closed	Open	Closed	Closed
50MHz	Closed	Open	Open	Open	Open
66iMHz	Open	Closed	Closed	Open	Closed

CPU TYPE SELECTION
Type	J1	J2	J3
80486SX	Open	Open	Pins 2 & 3 closed
80487SX	Closed	Pins 2 & 3 closed	Pins 1 & 2 closed
80486DX	Closed	Pins 1 & 2 closed	Pins 2 & 3 closed
80486DX2	Closed	Pins 1 & 2 closed	Pins 2 & 3 closed
P23T	Closed	Pins 2 & 3 closed	Pins 1 & 2 closed
P24T	Closed	Pins 2 & 3 closed	Pins 1 & 2 closed