80486ISA (03-009X-00) Motherboard Settings and Configuration

Device Type	Mainboard
Processor	80486SX/80487SX/80486DX
Processor Speed	25/33MHz
Chip Set	OPTI 486WB
Video Chip Set	None
Maximum Onboard Memory	32MB
Maximum Video Memory	None
Cache	64/256KB
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J11	Turbo LED	JP11
Power LED & keylock	J20	Reset switch	SW1
Speaker	J21	Turbo switch	SW2

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Monitor type select color	JP2	Open
	Monitor type select monochrome	JP2	Closed

SIMM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(4) 256K x 9	None
2MB	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	None
5MB	(4) 1M x 9	(4) 256K x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	None
20MB	(4) 1M x 9	(4) 4M x 9
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0	TAG
64KB	(8) 8K x 8	(1) 8K x 8
256KB	(8) 32K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP9	JP10
64KB	Open	Open
256KB	Closed	Closed

CPU TYPE SELECTION
Type	JP3	JP4	JP5
80486SX	Open	Open	Pins 2 & 3 closed
80487SX	Pins 1 & 2 closed	Closed	Pins 1 & 2 closed
80486DX	Pins 2 & 3 closed	Closed	Pins 1 & 2 closed