MicroFrame 386S Motherboard Settings and Configuration

Processor	80386SX
Processor speed	16/20MHz
Chip Set	C & T
Max. Onboard DRAM	4MB
Cache	None
BIOS	AMI/Quadtel
Dimensions	330mm x 218mm
I/O Options	Parallel port, serial ports (2), floppy drive interface, IDE interface, bus mouse port
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Auxiliary Keyboard	J8
CMOS Reset switch	J2	IDE interface	J9
Floppy drive LED	J3	Floppy drive interface	J11
No connection (key)	J6 pin 1	CPU ready LED	J12
-Ready	J6 pin 2	Reset switch	J13
-Keyboard disabled	J6 pin 3	Parallel port	J14
No connection	J6 pin 4	Serial port (COM1)	J19
No connection	J6 pin 5	Serial port (COM2)	J20
-Disk	J6 pin 6	Digital video	J22
-Reset	J6 pin 7	Analog video	J23
-GND	J6 pin 8	Speaker	J24
-Speaker	J6 pin 9	IDE interface LED	J28
+5VDC	J6 pin 10	Power LED & keylock	J52
Bus mouse port	J7

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	IDE Interface - pin 34 is not grounded	J15	Open
	IDE Interface - pin 34 is grounded	J15	Closed
»	Factory configured - do not alter	J16	pins 1 & 2 closed
»	Parallel port (J14) select LPT1/IRQ7	J21	Closed
	Parallel port (J14) disabled	J21	Open
»	Serial port (J19) select COM1/IRQ4	J25	Closed
	Serial port (J19) disabled	J25	Open
»	DMA signal select default-high	J26	pins 1 & 2 closed
	DMA signal select default-low	J26	pins 2 & 3 closed
»	Serial port (J20) select COM2/IRQ3	J30	Closed
	Serial port (J20) disabled	J30	Open
»	Floppy precompensation select 125ns	J31	Open
	Floppy precompensation select 187ns	J31	Closed
»	Floppy drive speed select single speed	J32	Open
	Floppy drive speed select dual speed	J32	Closed
»	Floppy disk change signal enabled	J33	Closed
	Floppy disk change signal disabled	J33	Open
»	On-board video port enabled	J34	Closed
	On-board video port disabled	J34	Open
»	Pipeline mode enabled	J35	Closed
	Pipeline mode disabled	J35	Open
»	Factory configured - do not alter	J36	Open
»	Factory configured - do not alter	J37	pins 1 & 2 closed
»	On-board video mode select 16-bit	J38	Open
	On-board video mode select 8-bit	J38	Closed
»	NPU disabled	J39	Open
	NPU enabled	J39	Closed

USER CONFIGURABLE SETTINGS (CON’T)
Function		Jumper	Position
»	Factory configured - do not alter	J42	pins 1 & 2 closed
»	Bus mouse port (J7) interface select IRQ12	J45	Closed
	Bus mouse port (J7) interface select none	J45	Open
	Keyboard controller type select without mouse support	J48	pins 1 & 2 closed
	Keyboard controller type select with mouse support	J48	pins 2 & 3 closed
»	Monitor type select color	J51	pins 2 & 3 closed
	Monitor type select monochrome	J51	pins 1 & 2 closed
»	Factory configured - do not alter	J53	Open
»	IRQ5 enabled (Rev. B and later)	J54	Closed
	IRQ5 disabled (Rev. B and later)	J54	Open
»	On-board mouse support enabled (Rev. B and later)	J55	pins 1 & 2 closed
	On-board mouse support disabled (Rev. B and later)	J55	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
2MB	(2) 1M x 9	NONE
4MB	(2) 1M x 9	(2) 1M x 9

VIDEO DISPLAY MODE JUMPERS
BIOS Primary	BIOS Secondary	JP27 pins
Adapter	Adapter	1 & 2	3 & 4	5 & 6	7 & 8	9 & 10	JP29
MDA	*EGA w/CD 40x25	Closed	Closed	Closed	Closed	Open	1 & 2
MDA	*EGA w/CD 80x25	Open	Closed	Closed	Closed	Open	1 & 2
MDA	*EGA w/ED 200 line	Closed	Open	Closed	Closed	Open	1 & 2
MDA	*EGA w/ED 350 line	Open	Open	Closed	Closed	Open	1 & 2
CGA 40x25	*EGA w/MD	Closed	Closed	Open	Closed	Open	2 & 3
CGA 80x25	*EGA w/MD	Open	Closed	Open	Closed	Open	2 & 3
*EGA w/CD 40x25	MDA or none	Closed	Open	Open	Closed	Open	1 & 2
*EGA w/CD 80x25	MDA or none	Open	Open	Open	Closed	Open	1 & 2
*EGA w/ED200 line	MDA or none	Closed	Closed	Closed	Open	Open	1 & 2
*EGA w/ED350 line	MDA or none	Open	Closed	Closed	Open	Open	1 & 2
*EGA w/MD	CGA 40x25 or none	Closed	Open	Closed	Open	Open	2 & 3
*EGA w/MD	CGA 80x25 or none	Open	Open	Closed	Open	Open	2 & 3
All VGA Modes	N/A	N/A	N/A	N/A	N/A	Closed	N/A
Note:Settings marked with an asterisk (*) indicate configuration of the onboard video adapter, other configurations require an optional video card. Pins designated should be in the closed position. CD = Color Display (CGA) ED = Enhanced color display (EGA) MD = Monochrome Display

IOCHRDY SIGNAL CONFIGURATION
Drive	J17	J18
Pin 21 CDC/Imprimis/Miniscribe/Maxtor/Seagate	Closed	Open
pin 27 Quantum	Open	Closed