MNC INTERNATIONAL, INC.

MNC 1144 COMPLETE 486SBC (Rev. 2.10)

Processor	80486SX/80487SX/80486DX/8486DX2
Processor Speed	25/33/50(internal)/50/66(internal)
Chip Set	VSLI
Max. Onboard DRAM	32MB
Cache	None
BIOS	Phoenix
Dimensions	333mm x 107mm
I/O Options	Floppy drive interface, IDE interface, parallel port, serial port (2), VGA port
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
IDE interface LED	J1	Serial port 2	P4
Turbo LED	J5	Front panel switches	P5
IDE interface	P1	LCD screen	P6
Floppy drive interface	P2	VGA port	P7
Serial port 1	P3	Parallel port	P8

DRAM CONFIGURATION
Size	Bank 0	Bank 1
2MB	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE
5MB	(4) 256K x 9	(4) 1M x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	IDE interface enabled	J2	pins 2 & 3 closed
	IDE interface disabled	J2	pins 1 & 2 closed
»	Floppy drive interface select normal operation	J3A	pins 2 & 3 closed
	Floppy drive interface select encoded	J3A	pins 1 & 2 closed
»	Floppy drive interface enabled	J3B	pins 2 & 3 closed
	Floppy drive interface disabled	J3B	pins 1 & 2 closed
»	J3 Jumper settings enabled	J3H	pins 2 & 3 closed
	J3 Jumper settings disabled	J3H	pins 1 & 2 closed
	Watchdog Timer interval select 1.2 second	J4	pins 1 & 2 closed
	Watchdog Timer interval select 150ms	J4	pins 2 & 3 closed
	Watchdog Timer interval select 600ms	J4	open
»	Watchdog Timer enabled	J4A	pins 1 & 2 closed
	Watchdog Timer disabled	J4A	pins 2 & 3 closed
»	Monitor type select color	J7	closed
	Monitor type select monochrome	J7	open
	Paralell port select Uni-directional	J9	pins 2 & 3 closed
	Paralell port select Bi-directional	J9	pins 1 & 2 closed
»	Bus cycle lock enabled	J14	closed
	Bus cycle lock disabled	J14	open
»	Burst mode enabled	J17	closed
	Burst mode disabled	J17	open
»	Secondary cache disabled	J18	open
	Secondary cache enabled	J18	closed
»	VGA port interrupt request select none	J20	pins 1 & 2 closed
	VGA port interrupt request select IR/FONT>	J20	pins 2 & 3 closed
Note:To disable Watchdog Timer (J4A) you must cut the trace between pins 1 & 2 on back of board.

SERIAL PORT CONFIGURATION
Serial port 1	Serial port 2	J3C	J3D	J3E
COM1	COM2	pins 2 & 3	pins 2 & 3	pins 2 & 3
COM1	Disabled	pins 2 & 3	pins 1 & 2	pins 2 & 3
COM2	Disabled	pins 1 & 2	pins 1 & 2	pins 2 & 3
COM2	COM1	pins 1 & 2	pins 2 & 3	pins 2 & 3
Disabled	COM1	pins 1 & 2	pins 2 & 3	pins 1 & 2
Disabled	COM2	pins 2 & 3	pins 2 & 3	pins 1 & 2
Disabled	Disabled	pins 1 & 2	pins 1 & 2	pins 1 & 2
Note:Pins designated should be in the closed position.

PARALLEL PORT CONFIGURATION
Function		J3F	J3G
»	Parallel port (P8) select LPT1 at 378h	pins 2 & 3 closed	pins 2 & 3 closed
	Parallel port (P8) select LPT2 at 278h	pins 1 & 2 closed	pins 2 & 3 closed
	Parallel port (P8) select LPT3 at 3BCh	pins 2 & 3 closed	pins 1 & 2 closed
	Parallel port (P8) disabled	pins 1 & 2 closed	pins 1 & 2 closed

LCD DISPLAY TYPE CONFIGURATION
Type	J8
0	open
1	pins 1 & 2 closed
2	pins 3 & 4 closed
3	pins 1 & 2 and 3 & 4 closed

FLASH MEMORY ADDRESS CONFIGURATION
Address	J19
C0000 - C7FFF	open
C8000 - CFFFF	pins 3 & 4 closed
D0000 - D7FFF	pins 1 & 2 closed
D8000 - DFFFF	pins 1 & 2 and 3 & 4 closed

CPU TYPE CONFIGURATION
Type	J12	J13
80486DX2	pins 1 & 2 and 3 & 4 closed	pins 3 & 4 closed
80846DX	pins 1 & 2 and 3 & 4 closed	pins 3 & 4 closed
80487SX	pins 1 & 2 and 3 & 4 closed	pins 1 & 2 closed
80486SX	pins 2 & 3 closed	pins 2 & 3 closed

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