Processor	80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed	20/25/33/40(internal)/50/50(internal)/66(internal)
Chip Set	OPTI
Max. Onboard DRAM	64MB
SRAM Cache	64/128/256KB
BIOS	AMI
Dimensions	330mm x 202mm
I/O Options	16-bit riser card slot, bus mouse port, diagnostic port floppy drive interface, IDE interface, parallel port, PS/2 style keyboard serial ports (2), VGA feature connector, VGA port
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Diagnostic port	DIAG	IDE interface	J13
VGA port	J1	Power LED & keylock	J15
Parallel port	J2	Turbo LED	J16
Serial port (COM2)	J3	Turbo switch	J17
Serial port (COM1)	J4	Reset switch	J18
Bus mouse port	J5	Speaker	J19
PS/2 style keyboard connector	J6	External battery	P1
VGA feature connector	J7	16-bit riser card	S1
Floppy drive interface	J12

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	JP18	pins 2 & 3 closed
	CMOS memory clear	JP18	pins 1 & 2 closed
»	Monitor type select color	JP19	closed
	Monitor type select monochrome	JP19	open
»	BIOS type select EPROM	JP20	pins 2 & 3 closed
	BIOS type select Flash ROM	JP20	pins 1 & 2 closed
»	On-board VGA enabled	JP21	closed
	On-board VGA disabled	JP21	open

VRAM CONFIGURATION
Size	VRAM
512KB	NONE
1024KB	(4) 44256
Note:The base 512KB is soldered on board.

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(1) 256K x 36	NONE	NONE	NONE
2MB	(1) 256K x 36	(1) 256K x 36	NONE	NONE
3MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	NONE
4MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
4MB	(1) 1M x 36	NONE	NONE	NONE
5MB	(1) 256K x 36	(1) 1M x 36	NONE	NONE
6MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	NONE
7MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36
8MB	(1) 1M x 36	(1) 1M x 36	NONE	NONE
9MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36	NONE
10MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	NONE
13MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 4M x 36	NONE	NONE	NONE
32MB	(1) 4M x 36	(1) 4M x 36	NONE	NONE
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	NONE
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36

CPU TYPE CONFIGURATION
Type	JP1	JP2	JP3	JP11	JP13
80486DX2	pins 1 & 2	closed	pins 1 & 2	closed	pins 2 & 3
80486DX	pins 1 & 2	closed	pins 1 & 2	closed	pins 2 & 3
80487SX	pins 1 & 2	closed	pins 2 & 3	closed	pins 2 & 3
80486SX	pins 2 & 3	open	open	closed	pins 2 & 3
80386DX	N/A	N/A	N/A	open	pins 1 & 2
Note:Pins designated should be in the closed position.

CPU SPEED CONFIGURATION
Speed	OSCI	JP12	S0	S1	S2
20MHz	40MHz	pins 2 & 3	closed	open	closed
25MHz	50MHz	pins 2 & 3	open	open	closed
33MHz	66MHz	pins 2 & 3	closed	closed	open
40MHz	80MHz	pins 2 & 3	open	closed	open
50(internal)MHz	50MHz	pins 2 & 3	open	open	closed
50MHz	50MHz	pins 1 & 2	open	open	closed
66(internal)MHz	66MHz	pins 2 & 3	closed	closed	open
Note:Pins designated should be in the closed position.

SRAM JUMPER CONFIGURATION
Size	JP4	JP5	JP6	JP7
64KB	open	open	open	open
128KB	closed	open	open	closed
256KB	closed	closed	closed	closed

SRAM CONFIGURATION
Size	Cache SRAM	Location	TAG
64KB	(8) 8K x 8	Banks 0 & 1	(1) 16K x 4
128KB	(4) 32K x 8	Bank 0	(1) 16K x 4
256KB	(8) 32K x 8	Banks 0 & 1	(1) 16K x 4

PARALLEL & SERIAL PORT IRQ CONFIGURATION
Function/IRQ		Jumper	Position
»	Parallel port interrupt select IRQ7	JP14/PP	pins 1 & 2 closed
	Parallel port interrupt select IRQ5	JP14/PP	pins 2 & 3 closed
»	Serial port COM 1 interrupt select IRQ4	JP14/S1	pins 1 & 2 closed
	Serial port COM 1 interrupt select IRQ3	JP14/S1	pins 2 & 3 closed
»	Serial port COM 2 interrupt select IRQ3	JP14/S2	pins 2 & 3 closed
	Serial port COM 2 interrupt select IRQ4	JP14/S2	pins 1 & 2 closed