Processor	80486DX
Processor Speed	20/25/33/50MHz
Chip Set	OPTI
Max. Onboard DRAM	32MB
Cache	64/128/256/512KB
BIOS	AMI
Dimensions	330.2mm x 218.4mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J3	Speaker	J18
Turbo switch	J16	Power LED & keylock	J19
Reset switch	J17	Turbo LED	J20

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	J4	pins 2 & 3 closed
	CMOS memory clear	J4	pins 1 & 2 closed
»	Monitor type select color	J5	closed
	Monitor type select monochrome	J5	open
»	CPU speed select iOSC/2	J9	pins 2 & 3 closed
	CPU speed select iOSC	J9	pins 1 & 2 closed
	Bus speed select ATCLK/6	J10	closed
	Bus speed select ATCLK/4	J10	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) 1M x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
17MB	(4) 256K x 9	(4) 4M x 9
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Cache CACHE	Location	TAG (U42)	TAG (U55)
64KB	(8) 8K x 8	Bank 0	(1) 64K x 1	(1) 8K x 8
128KB	(16) 8K x 8	Banks 0 & 1	(1) 64K x 1	(1) 8K x 8
256KB	(8) 32K x 8	Bank 0	(1) 64K x 1	(1) 32K x 8
512KB	(16) 32K x 8	Banks 0 & 1	(1) 64K x 1	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	J11	J12	J13	J14	J15
64KB	open	open	open	open	pins 2 & 3 closed
128KB	open	open	closed	closed	pins 2 & 3 closed
256KB	open	closed	closed	closed	pins 2 & 3 closed
512KB	closed	closed	closed	closed	pins 1 & 2 closed

CPU JUMPER CONFIGURATION
CPU	J6	J7	J8
80486DX	pins 1 & 2 closed	closed	pins 2 & 3 closed
80487SX	pins 2 & 3 closed	closed	pins 2 & 3 closed
80486SX	open	open	pins 1 & 2 closed