VL/ISA-PB486P3 Motherboard Settings and Configuration

Processor	80486SX/CX486DX/80486DX/SL80486DX/80486DX2/(SL)80486DX2/ AM486/80486DX4
Processor Speed	25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)MHz
Chip Set	OPTI
Video Chip Set	None
Maximum Onboard Memory	64MB
Maximum Video Memory	None
Cache	128/256/512KB
BIOS	AMI
Dimensions	254mm x 218mm
I/O Options	32-bit VESA local bus slots (3), green PC connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J2	Reset switch	S1
Speaker	JP18	32-bit VESA local bus slots	SL1 - SL3
Green PC connector	JP21	Turbo LED	TBLED
Green PC connector	JP32	Turbo switch	TBSW

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	JP12	Open
»	Factory configured - do not alter	JP14	Pins 1 & 2 closed
»	Factory configured - do not alter	JP23	Open
»	CMOS memory normal operation	JP26	Pins 2 & 3 closed
	CMOS memory clear	JP26	Pins 1 & 2 closed
»	Monitor type select color	JP30	Closed
	Monitor type select monochrome	JP30	Open
»	Factory configured - do not alter	JP37	Pins 1 & 2 closed
»	Factory configured - do not alter	JP44	Pins 2 & 3 closed
»	Factory configured - do not alter	JP45	Pins 2 & 3 closed
»	Factory configured - do not alter	JP46	Pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2
1MB	(4) 256K x 9	None	None
2MB	None	(1) 512K x 36	None
4MB (A)	(4) 1M x 9	None	None
4MB (B)	None	(1) 1M x 36	None
4MB (C)	None	(1) 512K x 36	(1) 512K x 36
6MB	None	(1) 512K x 36	(1) 1M x 36
8MB (A)	(4) 1M x 9	None	(1) 1M x 36
8MB (B)	None	(1) 2M x 36	None
8MB (C)	None	(1) 1M x 36	(1) 1M x 36
10MB	None	(1) 512K x 36	(1) 2M x 36
12MB (A)	(4) 1M x 9	None	(1) 2M x 36
12MB (B)	None	(1) 1M x 36	(1) 2M x 36
16MB (A)	(4) 4M x 9	None	None
16MB (B)	None	(1) 4M x 36	None
16MB (C)	None	(1) 2M x 36	(1) 2M x 36
16MB (D)	(4) 4M x 9	(1) 2M x 36	(1) 1M x 36
20MB (A)	(4) 1M x 9	None	(1) 4M x 36
20MB (A)	None	(1) 1M x 36	(1) 4M x 36
32MB (A)	(4) 4M x 9	None	(1) 4M x 36
32MB (B)	None	(1) 4M x 36	(1) 4M x 36
32MB (C)	None	(1) 8M x 36	None
64MB (A)	None	(1) 8M x 36	(1) 8M x 36
64MB (B)	(4) 4M x 9	(1) 8M x 36	(1) 4M x 36
Note: The location of banks 1 & 2 are unidentified.

DRAM JUMPER CONFIGURATION
Size	JP42
1MB	Pins 1 & 2 closed
2MB	Pins 1 & 2 closed
4MB (A)	Pins 1 & 2 closed
4MB (B)	Pins 1 & 2 closed
4MB (C)	Pins 1 & 2 closed
6MB	Pins 1 & 2 closed
8MB (A)	Pins 1 & 2 closed
8MB (B)	Pins 1 & 2 closed
8MB (C)	Pins 1 & 2 closed
10MB	Pins 1 & 2 closed
12MB (A)	Pins 1 & 2 closed
12MB (B)	Pins 1 & 2 closed
16MB (A)	Pins 1 & 2 closed
16MB (B)	Pins 1 & 2 closed
16MB (C)	Pins 1 & 2 closed
16MB (D)	Pins 2 & 3 closed
20MB (A)	Pins 1 & 2 closed
20MB (A)	Pins 1 & 2 closed
32MB (A)	Pins 1 & 2 closed
32MB (B)	Pins 1 & 2 closed
32MB (C)	Pins 1 & 2 closed
64MB (A)	Pins 1 & 2 closed
64MB (B)	Pins 2 & 3 closed

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
512KB	(4) 128K x 8	None	(1) 32K x 8
Note: The location of banks 0 & 1 and the TAG are unidentified.

CACHE JUMPER CONFIGURATION
Size	JP10	JP11	JP13	JP35
128KB	Open	Closed	Pins 1 & 2 closed	Pins 1 & 2 closed
256KB	Closed	Closed	Pins 2 & 3 closed	Pins 1 & 2 closed
512KB	Closed	Closed	Pins 1 & 2 closed	Pins 2 & 3 closed

CPU SPEED SELECTION
Speed	JP38	JP39
25MHz	Open	Closed
33MHz	Closed	Open
40MHz	Open	Open
50iMHz	Open	Closed
50MHz	Closed	Closed
66iMHz	Closed	Open
75iMHz	Open	Closed
80iMHz	Open	Open
100iMHz	Closed	Open

CPU TYPE SELECTION
Type	JP3	JP4	JP5	JP6	JP7
80486SX	Open	Open	Open	1 & 2	Open
SL80486SX	Open	Open	Open	1 & 2	Open
CX486DX (1x)	1 & 2	Open	2 & 3	2 & 3	Open
CX486DX (2x)	1 & 2	Open	2 & 3	2 & 3	Open
80486DX	1 & 2	Open	2 & 3	1 & 2	Open
SL80486DX	1 & 2	Open	2 & 3	1 & 2	Open
80486DX2	1 & 2	Open	2 & 3	1 & 2	Open
AM486 3.3v (2x)	1 & 2	Open	2 & 3	1 & 2	2 & 3
AM486 3.3v (3x)	1 & 2	Open	2 & 3	1 & 2	1 & 2
80486DX4	1 & 2	Open	2 & 3	1 & 2	Open
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type	JP8	JP9	JP22	JP24	JP25
80486SX	2 & 3	Open	1 & 2	Open	Open
SL80486SX	2 & 3	Open	1 & 2	Closed	Closed
CX486DX (1x)	1 & 2	1 & 2	1 & 2	Open	Open
CX486DX (2x)	1 & 2	1 & 2	1 & 2	Open	Open
80486DX	1 & 2	Open	1 & 2	Open	Open
SL80486DX	1 & 2	Open	1 & 2	Closed	Closed
80486DX2	1 & 2	Open	1 & 2	Open	Open
AM486 3.3v (2x)	1 & 2	Open	1 & 2	Open	Open
AM486 3.3v (3x)	1 & 2	Open	1 & 2	Open	Open
80486DX4	1 & 2	Open	1 & 2	Closed	Closed
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type	JP27	JP36	JP40	JP43
80486SX	Open	Pins 1 & 2 closed	Open	Open
SL80486SX	Open	Pins 2 & 3 closed	Open	Open
CX486DX (1x)	Pins 1 & 2 closed	Pins 1 & 2 closed	Open	Open
CX486DX (2x)	Pins 2 & 3 closed	Pins 1 & 2 closed	Open	Open
80486DX	Open	Pins 1 & 2 closed	Open	Open
SL80486DX	Open	Pins 2 & 3 closed	Open	Open
80486DX2	Open	Pins 1 & 2 closed	Open	Open
AM486 3.3v (2x)	Open	Pins 1 & 2 closed	Open	Open
AM486 3.3v (3x)	Open	Pins 1 & 2 closed	Open	Open
80486DX4	Open	Pins 2 & 3 closed	Closed	Open

CPU VOLTAGE SELECTION
Voltage	JP1
3.3v	Open
5v	Closed

VL BUS WAIT STATE SELECTION
Setting		JP33
»	0	Open
	1	Closed

VL BUS SPEED SELECTION
Speed		JP34
»	<= 33MHz	Open
	>33 MHz	Closed