486ISA Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX
Processor Speed	20/25/33/50MHz
Chip Set	Intercomp
Max. Onboard DRAM	32MB
SRAM Cache	64/256KB
BIOS	AMI/MR
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J10	Reset switch	JP33
Turbo LED	JP12	Diagnostic LED	JP101
Speaker	JP24	Turbo switch	SW2
Power LED & keylock	JP25

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color (AMI BIOS)	JP1	Closed
	Monitor type select monochrome (AMI BIOS)	JP1	Open
»	Password disabled (MR BIOS)	JP1	Open
	Password enabled (MR BIOS)	JP1	Closed
»	CMOS memory normal operation	JP2	pins 1 & 2 closed
	CMOS memory clear	JP2	pins 2 & 3 closed
»	Battery select internal	JP345	pins 2 & 3 closed
	Battery select external	JP345	pins 1 & 2 closed

DRAM 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
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9

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

CACHE JUMPER CONFIGURATION
Size	JP8	JP9	JP10	JP11
64KB	Open	Open	Open	Open
256KB	Closed	Closed	Open	Closed