Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	16/20/25/33/50(internal)/50/66(internal)MHz
Chip Set	ACC Micro
Max. onboard DRAM	32MB
SRAM Cache	None
BIOS	Phoenix
Dimensions	337mm x 132mm
I/O Options	Floppy drive interface, IDE interface, parallel port, serial port (2), VGA port
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Turbo LED	J5	Serial Port (COM2)	P4
IDE interface	P1	LCD panel connector	P6
Floppy drive interface	P2	VGA port	P7
Serial Port (COM1)	P3	Parallel port	P8

PIN OUT CONFIGURATION P5
Function	Pin
Power good signal detect from board	1
Keyboard ground	2
+ Keyboard clock	3
+ 5Vdc	4
+ Keyboard data	5
Ground	6
Reset switch	7
Keyboard inhibit switch	8
Speaker	9 & 10
Not used	11 & 12

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	IDE LED select LED with series resistor (all action instruments. chassis)	J1	pins 1 & 2
	IDE LED select LED only	J1	pins 2 & 3
»	IDE interface enabled	J2	pins 2 & 3
	IDE interface disabled	J2	pins 1 & 2
»	Floppy drive interface select normal	J3A	pins 2 & 3
	Floppy drive interface select encoded	J3A	pins 1 & 2
»	Floppy drive interface enabled	J3B	pins 2 & 3
	Floppy drive interface disabled	J3B	pins 1 & 2
»	J3A - J3G jumpers enabled	J3H	pins 1 & 2
	J3A - J3G jumpers disabled (All J3 settings go to default)	J3H	pins 2 & 3
»	Watch Dog timer delay 1.2 second	J4	pins 1 & 2
	Watch Dog timer delay 150ms delay	J4	pins 2 & 3
	Watch Dog timer delay 600ms delay	J4	Open
»	Watch Dog timer enabled	J4A	pins 1 & 2
	Watch Dog timer disabled	J4A	pins 2 & 3
»	Factory configured - do not alter	J6	Open
»	Monitor type select color	J7	Closed
	Monitor type select monochrome	J7	Open
»	Parallel port select uni-directional (printer)	J9	pins 2 & 3
	Parallel port select bi-directional	J9	pins 1 & 2
»	Bus cycle lock enabled	J14	Closed
	Bus cycle lock disabled	J14	Open
»	Last cycle burst enabled	J17	Closed
	Last cycle burst disabled	J17	Open
»	Factory configured - do not alter	J18	Closed
»	IRQ select Internal CRT interrupt	J20	pins 1 & 2
	IRQ select AT bus	J20	pins 2 & 3
Note:Pins designated should be in the closed position.

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
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9

FLASH MEMORY CONFIGURATION
Address	J19/pins 1 & 2	J19/pins 3 & 4
C0000-C7FFF	Open	Open
C8000-CFFFF	Open	Closed
D0000-D7FFF	Closed	Open
D8000-DFFFF	Closed	Closed

SERIAL PORT CONFIGURATION
UART 1/P3	UART 2/P4	J3C	J3D	J3E
COM1	COM2	pins 2 & 3	pins 2 & 3	pins 2 & 3
Disable	COM2	pins 2 & 3	pins 2 & 3	pins 1 & 2
COM1	Disable	pins 2 & 3	pins 1 & 2	pins 2 & 3
Disable	Disable	pins 2 & 3	pins 1 & 2	pins 1 & 2
COM2	COM1	pins 1 & 2	pins 2 & 3	pins 2 & 3
Disable	COM1	pins 1 & 2	pins 2 & 3	pins 1 & 2
COM2	Disable	pins 1 & 2	pins 1 & 2	pins 2 & 3
Disable	Disable	pins 1 & 2	pins 1 & 2	pins 1 & 2
Note:Pins designated should be in the closed position.

PARALLEL PORT CONFIGURATION
LPT		ADDRESS	J3F	J3G
»	LPT1	378h	pins 2 & 3 closed	pins 2 & 3 closed
	LPT2	278h	pins 1 & 2 closed	pins 2 & 3 closed
	LPT3	3BCh	pins 2 & 3 closed	pins 1 & 2 closed
	Disabled	N/A	pins 1 & 2 closed	pins 1 & 2 closed

LCD PANEL TYPE/PLASMA PANEL
LCD TYPE	J8/pins 1 & 2	J8/pins 3 & 4
0	Open	Open
1	Open	Closed
2	Closed	Open
3	Closed	Closed

CPU TYPE CONFIGURATION
CPU Type	J12	J13
80486SX	pins 2 & 3 closed	pins 2 & 3 closed
80487SX	pins 1 & 2, 3 & 4 closed	pins 3 & 4 closed
80486DX	pins 1 & 2, 3 & 4 closed	pins 3 & 4 closed
80486DX2	pins 1 & 2, 3 & 4 closed	pins 3 & 4 closed