Processor	80386DX/80486SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	Symphony
Max. Onboard DRAM	64MB
Cache	64/256/1024KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (2), floppy drive interface, game port, IDE interface, parallel port, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	CN1	Game interface	J19
Power LED & keylock	CN2	Parallel port	J20
Reset switch	CN3	IDE interface	J21
Turbo LED	CN4	Serial port 1	J22
Turbo switch	CN5	Serial port 2	J23
External battery	J2	32-bit VESA Local bus slots	SL1 & SL2
Floppy drive interface	J18

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	J3	pins 1 & 2 closed
	CMOS memory clear	J3	pins 2 & 3 closed
»	IDE interface enabled	JA1	Closed
	IDE interface disabled	JA1	Open
»	Battery type select internal	JP2	Closed
	Battery type select external	JP2	Open
»	BIOS type select Flash	JP3	pins 1 & 2 closed
	BIOS type select normal	JP3	pins 2 & 3 closed
»	Cache wait state select 1 wait state	JP11	Open
	Cache wait state select 0 wait states	JP11	Closed
»	VESA sample select T2	JP12	Open
	VESA sample select T3	JP12	Closed
»	Cache burst select <=33MHz	JP13	Open
	Cache burst select >33MHz	JP13	Closed
»	Factory configured - do not alter	JP32	pins 2 & 3 closed
»	Parallel port IRQ select IRQ5	W7	pins 1 & 2 closed
	Parallel port IRQ select IRQ7	W7	pins 2 & 3 closed
»	Floppy drive interface enabled	W12	pins 1 & 2 closed
	Floppy drive interface disabled	W12	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
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
64MB	(4) 16M x 9	NONE

CACHE CONFIGURATION
Size	Bank 0
64KB	(8) 8K x 8
256KB	(8) 32K x 8
1MB	(8) 128K x 8

CACHE JUMPER CONFIGURATION
Size	JP27	JP28	JP29	JP30	JP31
64KB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
256KB	2 & 3	1 & 2	2 & 3	1 & 2	2 & 3
1MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP6	JP9	JP10	JP17	JP18	JP33	JP34	JP35	JP36	JP37
80386	Open	Open	Closed	Closed	1 & 2	1 & 2	1 & 2	2 & 3	2 & 3	2 & 3
80486	Closed	Closed	Open	Open	2 & 3	2 & 3	2 & 3	1 & 2	1 & 2	1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP24	JP25	JP26
80486SX	pins 2 & 3 closed	Open	Open
80486DX	pins 1 & 2 closed	Closed	Closed

CPU SPEED CONFIGURATION
Type	JP4	JP5
25MHz	Open	Closed
33MHz	Closed	Open
40MHz	Open	Open
50MHz	Open	Closed
50iMHz	Open	Closed
66iMHz	Closed	Open

SERIAL PORT 1 CONFIGURATION
Port 1	W1	W2
COM1 (3F8)	pins 1 & 2 closed	pins 1 & 2 closed
COM2 (2F8)	pins 1 & 2 closed	pins 2 & 3 closed
COM3 (2E8)	pins 2 & 3 closed	pins 1 & 2 closed
Disabled	pins 2 & 3 closed	pins 2 & 3 closed

SERIAL PORT 2 CONFIGURATION
Port 2	W3	W5
COM1 (3F8)	pins 1 & 2 closed	pins 1 & 2 closed
COM2 (2F8)	pins 1 & 2 closed	pins 2 & 3 closed
COM4 (2E8)	pins 2 & 3 closed	pins 1 & 2 closed
Disabled	pins 2 & 3 closed	pins 2 & 3 closed

SERIAL PORT 1 INTERRUPT CONFIGURATION
Port 1	W11
IRQ3	pins 1 & 2 closed
IRQ4	pins 2 & 3 closed

SERIAL PORT 2 INTERRUPT CONFIGURATION
Port 2	W8
IRQ4	pins 1 & 2 closed
IRQ3	pins 2 & 3 closed

PARALLEL PORT CONFIGURATION
Port 1	W6	W9
LPT1 (378)	pins 1 & 2 closed	pins 1 & 2 closed
LPT2 (278)	pins 1 & 2 closed	pins 2 & 3 closed
LPT3 (3BC)	pins 2 & 3 closed	pins 1 & 2 closed
Disabled	pins 2 & 3 closed	pins 2 & 3 closed

IDE INTERFACE CONFIGURATION
Setting	W4	W10
Enabled	Closed	pins 1 & 2 closed
Disabled	Open	pins 2 & 3 closed

BUS SPEED CONFIGURATION
CPU speed	JP15
<=33MHz	Closed
> 33MHz	Open

VESA WAIT STATE CONFIGURATION
Wait states	JP16
0 wait states	Closed
1 wait state	Open

PHASE CONFIGURATION
Setting	JP8	JP14
1X	pins 2 & 3 closed	Closed
2X	pins 1 & 2 closed	Open

VESA PHASE CONFIGURATION
Setting	JP7	JP7A
1X	pins 2 & 3 closed	pins 2 & 3 closed
2X	pins 1 & 2 closed	pins 1 & 2 closed