A4872 Motherboard Settings and Configuration

Processor	80486DX
Processor Speed	33MHz
Chip Set	UMC
Max. Onboard DRAM	32MB
Cache	256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Reset switch	J9
Turbo LED	J7	Speaker	J10
Turbo switch	J8	Power LED & keylock	J11

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	J4	Closed
	Monitor type select monochrome	J4	Open
»	Factory configured - do not alter	J5	Open
»	CMOS memory normal operation	J6	pins 1 & 2 closed
	CMOS memory clear	J6	pins 2 & 3 closed
»	Factory configured - do not alter	W1	pins 1 & 2 closed
»	Factory configured - do not alter	W2	pins 1 & 2 closed
»	Factory configured - do not alter	W3	pins 1 & 2 closed
»	Factory configured - do not alter	W4	pins 1 & 2 closed
»	Factory configured - do not alter	W5	pins 2 & 3 closed
»	Factory configured - do not alter	W10	Open
»	Factory configured - do not alter	W11	Open
»	Factory configured - do not alter	W15	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
5MB	(4) 256K x 9	(4) 1 M 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
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	(4) 16K x 4
128KB	(4) 32K x 8	NONE	(4) 16K x 4
256KB	(4) 32K x 8	(4) 32K x 8	(4) 16K x 4

CACHE JUMPER CONFIGURATION
Size	W6	W7	W8	W9
64KB	pins 1 & 2 closed	pins 1 & 2 closed	Open	pins 1 & 2 closed
128KB	pins 1 & 2 closed	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed
256KB	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed

CPU TYPE CONFIGURATION
Type	W12	W13	W14
80486SX	Open	pins 2 & 3 closed	Open
80487SX	Closed	pins 1 & 2 closed	pins 2 & 3 closed
80486DX	Closed	pins 1 & 2 closed	pins 1 & 2 closed