PREFERRED C320SX Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	20MHz
Chip Set	C & T
Max. Onboard DRAM	16MB
SRAM Cache	16/32KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	IDE interface, floppy drive interface parallel port, serial port (2)
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	IDE interface LED	LED
Reset switch	J4/pins 1 & 2	Floppy drive interface	PJ1
Turbo LED	J4/pins 3 & 4	Parallel port	PJ2
Speaker	J6	Serial port 1	PJ3
Power LED & keylock	J8	Serial port 2	PJ4
Front panel switches & LEDs	J39	IDE interface	PJ5
Hard drive access LED	J40

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Floppy drive interface enabled	FDDEN	pins 2 & 3 closed
	Floppy drive interface disabled	FDDEN	pins 1 & 2 closed
»	IDE interface enabled	IDEEN	pins 2 & 3 closed
	IDE interface disabled	IDEEN	pins 1 & 2 closed
»	CMOS memory normal operation	J2	pins 2 & 3 closed
	CMOS memory clear	J2	pins 1 & 2 closed
»	I/O bus wait state select one	J3	open
	I/O bus wait states select zero	J3	pins 2 & 3 closed
»	Monitor type select color	J7	pins 2 & 3 closed
	Monitor type select monochrome	J7	pins 1 & 2 closed
»	Factory configured - do not alter	J9	open
»	Factory configured - do not alter	PJ7	open
»	Factory configured - do not alter	PJ8	open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(2) 256K x 9	(2) 256K x 9	NONE	NONE
2MB	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9
2MB	(2) 1M x 9	NONE	NONE	NONE
4MB	(2) 1M x 9	(2) 1M x 9	NONE	NONE
5MB	(2) 1M x 9	(2) 1M x 9	(2) 256K x 9	(2) 256K x 9
6MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	NONE
8MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9
8MB	(2) 4M x 9	NONE	NONE	NONE
9MB	(2) 4M x 9	(2) 256K x 9	(2) 256K x 9	NONE
10MB	(2) 4M x 9	(2) 1M x 9	NONE	NONE
11MB	(2) 4M x 9	(2) 1M x 9	(2) 256K x 9	(2) 256K x 9
12MB	(2) 4M x 9	(2) 1M x 9	(2) 1M x 9	NONE
14MB	(2) 4M x 9	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9
16MB	(2) 4M x 9	(2) 4M x 9	NONE	NONE

SRAM CONFIGURATION
Size	Cache SRAM	Location	TAG
16KB	(8) 16K x 1	Banks 0 & 1	(1) 8K x 8
32KB	(4) 8K x 8	Bank 0	(1) 8K x 8
Note:Location and configuration of Cache is unverified.

SRAM JUMPER CONFIGURATION
Size	Jumper W1	Jumper W2	Jumper W3	Jumper W4	Jumper W5
16KB	pins 1 & 2	pins 1 & 2	pins 1 & 2	pins 1 & 2	pins 1 & 2
32KB	pins 2 & 3	pins 2 & 3	pins 2 & 3	pins 2 & 3	pins 2 & 3
Note:Pins designated should be in the closed position.

SERIAL PORT 1 (PJ3) CONFIGURATION
COM	IRQ Interrupt	I/O Address	Jumper PJ6	S0	S1
COM 2	IRQ3	2F8h	pins 1 & 3	pins 1 & 2	pins 2 & 3
COM 1	IRQ4	3F8h	pins 1 & 2	pins 2 & 3	pins 2 & 3
Disabled	N/A	N/A	N/A	pins 1 & 2	pins 1 & 2
Note:Pins designated should be in the closed position.

SERIAL PORT 2 (PJ4) CONFIGURATION
COM	IRQ Interrupt	I/O Address	Jumper PJ6	S2	S3
COM 1	IRQ4	3F8h	pins 2 & 4	pins 1 & 2	pins 2 & 3
COM 2	IRQ3	2F8h	pins 3 & 4	pins 2 & 3	pins 2 & 3
Disabled	N/A	N/A	N/A	pins 1 & 2	pins 1 & 2
Note:Pins designated should be in the closed position.

PARALLEL PORT 1 (PJ2) CONFIGURATION
LPT	IRQ Interrupt	I/O Address	Jumper P0	Jumper P1	Jumper PRT
LPT 1	IRQ7	3F8h	pins 1 & 2	pins 2 & 3	pins 2 & 3
LPT 2	IRQ5	2F8h	pins 2 & 3	pins 2 & 3	pins 1 & 2
LPT 3	IRQ7	3BCh	pins 2 & 3	pins 1 & 2	pins 2 & 3
Disabled	N/A	N/A	pins 1 & 2	pins 1 & 2	N/A
Note:Pins designated should be in the closed position.