MT386SBC/486SLC Motherboard Settings and Configuration

Processor	80386SX/CX486SLC
Processor Speed	25MHz
Chip Set	UMC
Max. Onboard DRAM	16MB
Cache	None
BIOS	Phoenix
Dimensions	340mm x 105mm
I/O Options	Floppy drive interface, IDE interface, parallel port, serial ports (2), VGA port
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 1	CN1	Serial port 2	P4
VGA port	CN2	Power LED & keylock	P5 pins 1-5
IDE interface LED	J11	External switch reset	P5 pin 7
Turbo LED	J12	Keyboard inhibit switch	P5 pin 8
Hardware reset switch	J13	Speaker	P5 pins 9-10
IDE interface	P1	Turbo switch	P5 pins 11-12
Floppy drive interface	P2	Parallel port	P8

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Pipeline control disabled	J2	Open
	Pipeline control disabled	J2	Closed
»	NPU asynchronous with CPU	J3	Open
	NPU synchronous with CPU	J3	Closed
»	IDE interface enabled	J4	pins 1 & 2 closed
	IDE interface disabled	J4	pins 2 & 3 closed
»	Hardware reset when DCD on COM1 goes from on to off enabled	J5	Closed
	Hardware reset when DCD on COM1 goes from on to off disabled	J5	Open
»	Parallel port unidirectional (printer)	J7	pins 2 & 3 closed
	Parallel port bidirectional	J7	pins 1 & 2 closed
»	IRQ9 connected to AT bus	J10	pins 2 & 3 closed
	IRQ9 connected to internal VGA	J10	pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
512KB	(2) 256K x 9	NONE
1MB	(2) 256K x 9	(2) 256K x 9
4MB	(2) 1M x 9	(2) 1M x 9
8MB	(2) 4M x 9	NONE
16MB	(2) 4M x 9	(2) 4M x 9