ISA-486SIQ Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	20/25/33/50(internal)/50/66(internal)MHz
Chip Set	OPTI
Max. Onboard DRAM	32MB
SRAM Cache	64/128/256KB
BIOS	AMI
Dimensions	220mm x 240mm
I/O Options	None
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Reset	CON1	Turbo LED	CON4
Speaker	CON2	Turbo switch	CON5
Power LED & keylock	CON3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CPU speed select 25/33/50MHz	JP1	pins 2 & 3 closed
	CPU speed select 20MHz	JP1	pins 1 & 2 closed
»	Monitor type select monochrome	JP2	pins 1 & 2 closed
	Monitor type select color	JP2	pins 2 & 3 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) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

SRAM CONFIGURATION
Size	Cache	Location	TAG
64KB	(8) 8K x 8	Banks 0 & 1	(1) 8K x 8
128KB	(4) 32K x 8	Bank 0	(1) 8K x 8
256KB	(8) 32K x 8	Banks 0 & 1	(1) 32K x 8

SRAM JUMPER CONFIGURATION
Size	Jumper CJ1	Jumper CJ2	Jumper CJ3
64KB	pins 1 & 2 closed	pins 1 & 2 closed	open
128KB	pins 2 & 3 closed	open	closed
256KB	pins 2 & 3 closed	pins 2 & 3 closed	open

CPU JUMPER CONFIGURATION
CPU	Jumper CPJ1	Jumper CPJ2	Jumper CPJ3
80486DX	pins 2 & 3 closed	pins 1 & 2 and 3 & 4 closed	pins 2 & 3 closed
80487SX	pins 1 & 2 closed	pins 1 & 2 and 3 & 4 closed	pins 1 & 2 closed
80486SX	open	pins 2 & 3 closed	pins 2 & 3 closed