486 EISA SI-6 Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	33/50/66(internal)MHz
Chip Set	SIS
Max. Onboard DRAM	32MB (128MB with BIOS upgrade)
Cache	64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J1	Turbo switch	J4
Speaker	J2	Turbo LED	J5
Reset switch	J3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	JP9	pins 1 & 2 closed
»	Factory configured - do not alter	JP21	pins 1 & 2 closed
»	Burst mode select enabled	JP23	Closed
	Burst mode select disabled	JP23	Open
»	Monitor type select color	JP24	Open
	Monitor type select monochrome	JP24	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
64MB	(4) 16M x 9	None
128MB	(4) 16M x 9	(4) 16M x 9
Note : The main board will only accept 16M x 9 SIMMs if the BIOS upgrade is installed.

CACHE CONFIGURATION
Size	Bank 0	Bank 1
64KB	(4) 8K x 8	(4) 8K x 8
128KB	(4) 32K x 8	NONE
256KB	(4) 32K x 8	(4) 32K x 8
Note : Tag chips are factory installed and are not configurable.

CACHE JUMPER CONFIGURATION
Size	JP1	JP2	JP3	JP4	JP12	JP13
64KB	2 & 3	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
128KB	1 & 2	2 & 3	1 & 2	2 & 3	1 & 2	2 & 3
256KB	4 & 5	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP5	JP7	JP15
80486SX	pins 2 & 3 closed	pins 2 & 3 closed	Open
80487SX	pins 2 & 3 closed	pins 1 & 2 closed	Closed
80486DX	pins 1 & 2 closed	pins 1 & 2 closed	Closed

BATTERY TYPE CONFIGURATION
Type	JP10	JP11
DS1287	pins 1 & 2 closed	pins 1 & 2 closed
DS1488	pins 2 & 3 closed	pins 2 & 3 closed