Processor	80486SX/80486DX
Processor Speed	20/25/33/50MHz
Chip Set	SIS
Max. Onboard DRAM	32MB
Cache	32/64/128/256/512/1024KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	CN1	Turbo switch	JP1
Power LED & keylock	CN2	Turbo LED	JP2
External battery	CN3	Reset switch	SW1

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	JP5	pins 1 & 2 closed
	CMOS memory clear	JP5	pins 2 & 3 closed
»	Monitor type select monochrome	JP7	Open
	Monitor type select color	JP7	Closed
»	Factory configured - do not alter	JP8	Open
Note:Jumper JPX3 is closed using an 8-pin terminating resistor.

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	Location
32KB	(4) 8K x 8	NONE	(1) 8K x 8	T-1
32KB	(4) 8K x 8	(4) 8K x 8	(2) 16K x 4	T-2
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8	T-1
64KB	(4) 8K x 8	(4) 8K x 8	(2) 16K x 4	T-2
128KB	(4) 32K x 8	NONE	(1) 8K x 8	T-1
128KB	(4) 32K x 8	NONE	(2) 16K x 4	T-2
256KB	(4) 32K x 8	(4) 32K x 8	(2) 16K x 4	T-2
512KB	(4) 128K x 8	NONE	(1) 32K x 8	T-1
512KB	(4) 128K x 8	NONE	(2) 64K x 4	T-2
1024KB	(4) 128K x 8	(4) 128K x 8	(1) 128K x 8	T-1
1024KB	(4) 128K x 8	(4) 128K x 8	(2) 64K x 4	T-2

CACHE JUMPER CONFIGURATION
Size	JP3	JP4	JPX4	JPX5
32KB	Open	Open	pins 1 - 8 closed	pins 1 - 8 closed
64KB	Open	Open	pins 9 - 16 closed	pins 3 - 10 closed
128KB	Open	Closed	pins 1 - 8 closed	pins 5 - 12 closed
256KB	Open	Closed	pins 9 - 16 closed	pins 7 - 14 closed
512KB	Open	Closed	pins 1 - 8 closed	pins 9 - 16 closed
1024KB	Closed	Closed	pins 9 - 16 closed	pins 9 - 16 closed
Note:Jumpers JPX4 & JPX5 are closed using 8-pin terminating resistors.

CACHE JUMPER CONFIGURATION
Type	JP6	JPX3
80486SX	Closed	Open
80486DX	Open	Closed