486DX-AX4 Motherboard Settings and Configuration

Processor	80486SX/80486DX/80486DX2
Processor Speed	20/25/33/50(internal)/50/66(internal)MHz
Chip Set	SIS
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI
Dimensions	245mm x 220mm
I/O Options	None
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Turbo LED	JW3
Power LED & keylock	JW1	Reset switch	JW4
Speaker	JW2	Turbo switch	JW5

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	JP7	Open
»	Factory configured - do not alter	JP9	Open
»	CMOS memory normal operation	JP8	pins 1 & 2 closed
	CMOS memory clear	JP8	pins 2 & 3 closed
»	Monitor type select color	JP10	Closed
	Monitor type select monochrome	JP10	Open
»	Factory configured - do not alter	JP14	Open

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
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8
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	JPX1
64KB	pins 1 - 8 closed
128KB	pins 5 - 12 closed
256KB	pins 7 - 14 closed

CPU TYPE CONFIGURATION
Type	JP11	JP12
80486SX	Not installed	Closed
80486DX	Installed	Open
80486DX2	Installed	Open