MODEL D3/SX (VERSION 1) Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	16MHz
Chip Set	Zymos
Max. onboard DRAM	4MB
Cache	None
BIOS	Leading Edge
Dimensions	325mm x 308mm
I/O Options	Floppy drive interface, mouse port, parallel port, serial ports (2)
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Mouse port	CN1	Parallel port	CN4
Serial port 2	CN2	Floppy drive interface	CN5
Serial port 1	CN3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Floppy drive interface enabled	J19	pins 2 & 3 closed
	Floppy drive interface disabled	J19	pins 1 & 2 closed
»	Monitor type select color	J26	pins 2 & 3 closed
	Monitor type select monochrome	J26	pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	J22	J23
512KB	(2) 256K x 9	None	pins 2 & 3	pins 2 & 3
1MB	(2) 256K x 9	(2) 256K x 9	pins 1 & 2	pins 2 & 3
2MB	(2) 1M x 9	NONE	pins 2 & 3	pins 1 & 2
4MB	(2) 1M x 9	(2) 1M x 9	pins 1 & 2	pins 1 & 2
Note:Pins designated should be in the closed position.

PARALLEL PORT CONFIGURATION
IRQ		ADDRESS	J17	J20
»	7	378h	pins 2 & 3 closed	pins 2 & 3 closed
	5	378h	pins 2 & 3 closed	pins 1 & 2 closed
	7	278h	pins 1 & 2 closed	pins 2 & 3 closed
	5	278h	pins 1 & 2 closed	pins 1 & 2 closed
	Disabled	Disabled	Open	Open

SERIAL PORT CONFIGURATION
Port 1		Port 2	J16	J18
»	COM1	COM2	pins 1 & 2 closed	pins 1 & 2 closed
	COM1	COM4	pins 2 & 3 closed	pins 1 & 2 closed
	COM1	Disabled	Open	pins 1 & 2 closed
	COM3	COM2	pins 1 & 2 closed	pins 2 & 3 closed
	Disabled	COM2	pins 1 & 2 closed	Open
	COM3	COM4	pins 2 & 3 closed	pins 2 & 3 closed
	Disabled	COM4	pins 2 & 3 closed	Open
	Disabled	Disabled	Open	Open

MOUSE PORT INTERRUPTS
IRQ		J11	J12	J13	J14
»	IRQ9	Closed	Open	Open	Open
	IRQ3	Open	Closed	Open	Open
	IRQ4	Open	Open	Closed	Open
	IRQ5	Open	Open	Open	Closed