GA-486SA Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed	16/20/25/33/50(internal)/50/66(internal)MHz
Chip Set	OPTI
Max. Onboard DRAM	128MB
Cache	64/128/256/512KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit local bus card slots (2)
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J1	Turbo switch	J4
Reset	J2	Turbo LED	J5
Speaker	J3	32-bit local bus cards (2)	S1 & S2

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CPU type select 80486DX	J6	pins 1 & 2 closed
	CPU type select 80486SX	J6	pins 2 & 3 closed
»	Monitor type select color	J14	Closed
	Monitor type select monochrome	J14	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
64MB	(4) 16M x 9	NONE
128MB	(4) 16M x 9	(4) 16M 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
512KB	(4) 128K x 8	NONE	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	J8	J9	J10	J11
64KB	Open	Open	Open	Open
128KB	Open	Closed	Open	pins 1 & 2 closed
256KB	Open	Closed	Closed	pins 2 & 3 closed
512KB	Closed	Closed	Closed	pins 1 & 2 closed