286-12 Motherboard Settings and Configuration

Processor	80286
Processor Speed	12MHz
Chip Set	UMC
Video Chip Set	None
Maximum Onboard Memory	3MB
Maximum Video Memory	None
Cache	None
BIOS	Phoenix
Dimensions	385mm x 356mm
I/O Options	Floppy drive interface, game port, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot, modem interface
NPU Options	80287

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JBT	Front panel connector	JIND
Serial port 2	JCOM2	Parallel port	JLPT
Floppy drive interface	JFDD	Modem/serial port 1 interface	JMOD
Game port	JGAM	PS/2 mouse port	JPMS
IDE interface LED	JHDI	VGA port	JVGA
IDE interface	JHDD	Riser slot	SL1

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Modem/serial port 1 COM select COM1	JC13	Pins 1 & 2 closed
	Modem/serial port 1 COM select COM3	JC13	Pins 2 & 3 closed
»	Serial port 2 COM select COM2	JC24	Pins 1 & 2 closed
	Serial port 2 COM select COM4	JC24	Pins 2 & 3 closed
»	Floppy drive interface enabled	JFDC	Pins 1 & 2 closed
	Floppy drive interface disabled	JFDC	Pins 2 & 3 closed
»	IDE interface enabled	JHDC	Pins 1 & 2 closed
	IDE interface disabled	JHDC	Pins 2 & 3 closed
»	Factory configured - do not alter	JIOC	Unidentified
»	Game port enabled	JGAMS	Pins 1 & 2 closed
	Game port disabled	JGAMS	Pins 2 & 3 closed
»	Factory configured - do not alter	JKL	Unidentified
»	Parallel port LPT select LPT1	JLPS	Pins 1 & 2 closed
	Parallel port LPT select LPT2	JLPS	Pins 2 & 3 closed
»	Parallel port IRQ select IRQ7	JLRQ	Pins 1 & 2 closed
	Parallel port IRQ select IRQ5	JLRQ	Pins 2 & 3 closed
»	Mouse IRQ12 enabled	JMRQ	Closed
	Mouse IRQ12 disabled	JMRQ	Open
	Monitor type select color	JVD	Closed
	Monitor type select monochrome	JVD	Open
»	On board video enabled	JVGAS	Pins 2 & 3 closed
	On board video disabled	JVGAS	Pins 1 & 2 closed
»	VGA IRQ9 enabled	JVRQ	Closed
	VGA IRQ9 disabled	JVRQ	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2
1MB	1MB	None	None
2MB	1MB	(1) 1M x 8	None
3MB	1MB	(1) 1M x 8	(1) 1M x 8
Note: The location of banks 0, 1 & 2 are unidentified. Bank 0 is factory installed and is not configurable.