MODEL D2 Motherboard Settings and Configuration

Processor	80286
Processor Speed	8/10MHz
Chip Set	Zymos
Max. onboard DRAM	1MB
Cache	None
BIOS	Leading Edge
Dimensions	330mm x 330mm
I/O Options	Floppy drive interface, parallel port, serial port
NPU Options	80287

CONNECTIONS
Purpose	Location	Purpose	Location
Parallel port	CN1	Speaker	CN4
Serial port (25 pin)	CN2	Power LED & keylock	CN5
Floppy drive interface	CN3	Keyboard connector	CN6

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Floppy drive interface enabled	J7	Closed
	Floppy drive interface disabled	J7	Open
»	Floppy drive interface address select primary	J8	pins 2 & 3 closed
	Floppy drive interface address select secondary	J8	pins 1 & 2 closed
»	BIOS select 1 wait state	J25	pins 2 & 3 closed
	BIOS select 0 wait states	J25	pins 1 & 2 closed
»	CPU speed select 10MHz	J26	pins 2 & 3 closed
	CPU speed select 8MHz	J26	pins 1 & 2 closed
»	Monitor type select monochrome	J27	pins 2 & 3 closed
	Monitor type select color	J27	pins 1 & 2 closed
»	Factory configured - do not alter	J28	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	J23	J24
640KB	(16) 41256	(16) 4164	NONE	pins 2 & 3	pins 2 & 3
1024KB	(16) 41256	(16) 41256	NONE	pins 2 & 3	pins 1 & 2
1152KB	(16) 41256	(16) 4164	(16) 41256	pins 1 & 2	pins 2 & 3
Note:Pins designated should be in the closed position.

SERIAL PORT CONFIGURATION
COM1		COM2	IRQ	J5	J6
»	COM1	Disabled	4	pins 1 & 2 closed	pins 1 & 2 closed
	COM1	Disabled	3	pins 1 & 2 closed	pins 2 & 3 closed
	Disabled	COM2	3	pins 2 & 3 closed	pins 2 & 3 closed
	Disabled	COM2	4	pins 2 & 3 closed	pins 1 & 2 closed
	Disabled	Disabled	N/A	pins 1, 2 & 3 closed	N/A

PARALLEL PORT CONFIGURATION
LPT1		LPT2	IRQ	J3	J4
»	LPT1	Disabled	7	pins 1 & 2 closed	pins 1 & 2 closed
	LPT1	Disabled	5	pins 2 & 3 closed	pins 1 & 2 closed
	Disabled	LPT2	5	pins 2 & 3 closed	pins 2 & 3 closed
	Disabled	LPT2	7	pins 1 & 2 closed	pins 2 & 3 closed
	Disabled	Disabled	N/A	N/A	pins 1, 2, & 3 closed