386SX-II (PCB8961) Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	16/20MHz
Chip Set	Unidentified
Maximum Onboard Memory	5MB
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
NPU Options	80387SX

CONNECTIONS
Function	Label	Function	Label
PS/2 mouse port	CN1	Floppy drive interface	CN7
VGA port	CN2	Serial port 1	CN8
Game port	CN3	External battery	JBT
Parallel port	CN4	IDE interface LED	JHDL
Serial port 2	CN5	Front panel connector	JLND
IDE interface	CN6	Riser slot	SL1

USER CONFIGURABLE SETTINGS
Setting		Label	Position
»	Serial port 1 COM select COM1	JC13	Pins 1 & 2 closed
	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
»	Game port enabled	JGAMS	Pins 1 & 2 closed
	Game port disabled	JGAMS	Pins 2 & 3 closed
»	IDE interface enabled	JHDC	Pins 1 & 2 closed
	IDE interface disabled	JHDC	Pins 2 & 3 closed
»	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 2 & 3 closed
	Parallel port IRQ select IRQ5	JLRQ	Pins 1 & 2 closed
»	Factory configured - do not alter	JKL	N/A
»	Mouse IRQ select IRQ12	JMRQ	Closed
	Mouse IRQ select none	JMRQ	Open
»	Pipeline mode enabled	JPLP	Closed
	Pipeline mode disabled	JPLP	Open
»	Monitor type select color	JVD	Pins 2 & 3 closed
	Monitor type select monochrome	JVD	Pins 1 & 2 closed
»	VGA IRQ select IRQ9	JVRQ	Closed
	VGA IRQ select none	JVRQ	Open
»	Onboard video enabled	JVGAS	Pins 1 & 2 closed
	Onboard video enabled	JVGAS	Pins 2 & 3 closed

DRAM
Size	Banks 0 & 1	Bank 2	Bank 3
1MB	(8) 44256 & (4) 41256	None	None
2MB	(8) 44256 & (4) 41256	(2) 256K x 9	(2) 256K x 9
3MB	(8) 44256 & (4) 41256	(2) 1M x 9	None
5MB	(8) 44256 & (4) 41256	(2) 1M x 9	(2) 1M x 9
Note: Banks 0 & 1 are factory installed and not configurable. The orientation of the banks is unidentified.

MISCELLANEOUS TECHNICAL NOTE

The location of pin 1 is unidentified.