Processor	80486SX/80487SX/80486DX/80486DX2/P23T
Processor Speed	20/25/33/50(internal)/50/66(internal)MHz
Chip Set	Symphony
Video Chip Set	None
Maximum Onboard Memory	32MB
Maximum Video Memory	None
Cache	64/128/256KB
BIOS	AMI/DTK
Dimensions	252mm x 221mm
I/O Options	32-bit VESA local bus slots (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J5	Turbo LED	J8
Speaker	J6	Reset switch	J9
Turbo switch	J7	32-bit VESA local bus slots	SL1 & SL2

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	J2	Closed
»	Monitor type select monochrome	J26	Pins 1 & 2 closed
	Monitor type select color	J26	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
5MB	(4) 256K x 9	(4) 1M x 9
5MB	(4) 1M x 9	(4) 256K 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
17MB	(4) 4M x 9	(4) 256K x 9
20MB	(4) 1M x 9	(4) 4M x 9
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M 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

CACHE JUMPER CONFIGURATION
Size	J13	J14	J15	J16
None	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
64KB	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
128KB	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
256KB	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed

CACHE JUMPER CONFIGURATION (CON’T)
Size	J17	J18	J19	J20
None	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
64KB	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
128KB	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed
256KB	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed

CACHE WAIT STATE CONFIGURATION
Setting	J1	J23
0	Open	Closed
1	Closed	Open

CPU SPEED SELECTION
Speed	J21	J22	J24	J25
20MHz	Pins 1 & 2 closed	Open	Open	Open
25MHz	Pins 1 & 2 closed	Open	Open	Open
33MHz	Pins 1 & 2 closed	Open	Open	Open
50iMHz	Pins 1 & 2 closed	Open	Open	Closed
50MHz	Pins 2 & 3 closed	Closed	Closed	Closed
66iMHz	Pins 1 & 2 closed	Open	Open	Open

CPU TYPE SELECTION
Type	J10	J11	J12
80486SX	Open	Pins 2 & 3 closed	Open
80487SX	Closed	Pins 1 & 2 closed	Pins 2 & 3 closed
80486DX	Closed	Pins 1 & 2 closed	Pins 1 & 2 closed
80486DX2	Closed	Pins 1 & 2 closed	Pins 1 & 2 closed
P23T	Closed	Pins 1 & 2 closed	Pins 2 & 3 closed

VL BUS WAIT STATE SELECTION
Setting		J4
	0	Open
»	1	Closed

VL BUS SPEED SELECTION
Speed		J3
	<= 33MHz	Open
»	>33 MHz	Closed