MICROFRAME 386S6 Motherboard Settings and Configuration

Processor	80386SX (exact location unidentified)
Processor Speed	16/20MHz
Chip Set	C & T
Video Chip Set	None
Maximum Onboard Memory	8MB
Maximum Video Memory	None
Cache	None
BIOS	AMI
Dimensions	330mm x 215mm
I/O Options	Floppy drive interface, IDE interface, parallel port, PS/2 mouse interface, serial ports (2)
NPU Options	80387SX (exact location unidentified)

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Ready LED	J16
IDE interface LED	J3	Serial port 1	J18
Front panel connector	J6	Serial port 2	J20
PS/2 mouse interface	J8	Speaker	J22
Auxiliary keyboard connector	J9	Reset switch	J23
IDE interface	J10	IDE access LED	J24
Floppy drive interface	J11	Power LED & keylock	J40
Parallel port	J15

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	CMOS memory normal operation	J2	Open
	CMOS memory clear	J2	Closed
»	Factory configured - do not alter (oscillators enabled)	J7	Open
	Factory configured - do not alter (oscillators disabled)	J7	Closed
	PS/2 mouse CLK enabled	J12	Pins 2 & 3 closed
	PS/2 mouse CLK disabled	J12	Pins 1 & 2 closed
	PS/2 mouse data enabled	J13	Pins 1 & 2 closed
	PS/2 mouse data disabled	J13	Pins 2 & 3 closed
	PS/2 mouse IRQ12 enabled	J17	Closed
	PS/2 mouse IRQ12 disabled	J17	Open
»	Pipeline mode enabled	J19	Closed
	Pipeline mode disabled	J19	Open
»	Monitor type select EGA/VGA	J21	Pins 2 & 3 closed
	Monitor type select monochrome	J21	Pins 1 & 2 closed
»	Factory configured - do not alter	J25	Unidentified
»	Factory configured - do not alter (80387SX ready signal)	J27	Closed
»	Factory configured - do not alter	J53	Unidentified
»	IDE interface enabled	S1/1	On
	IDE interface disabled	S1/1	Off
»	IDE IOCHRDY signal from pin 21 (Seagate/CDC/Imprimis/Miniscribe)	S1/2	On
»	IDE IOCHRDY signal from pin 27 (Quantum)	S1/3	On
»	Factory configured - do not alter	S1/4	Not used
»	Floppy drive interface enabled	S1/5	On
	Floppy drive interface disabled	S1/5	Off
»	Floppy drive change signal enabled	S1/6	On
	Floppy drive change signal disabled	S1/6	Off
»	Floppy drive speed select single speed	S1/7	Off
	Floppy drive speed select two speed	S1/7	On
»	Floppy drive pre-compensation value select 125ns	S1/8	Off
	Floppy drive pre-compensation value select 187ns	S1/8	On
»	Factory configured - do not alter	S4/4	Not used
Note: If using a Conner or Western Digital drive, ignore settings for S1/2 & S1/3.

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
512KB	(2) 256K x 9	None	None	None
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
3MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	None
4MB	(2) 1M x 9	(2) 1M x 9	None	None
5MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	(2) 1M 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

DMA CHANNEL SELECTION
Channel		J26
»	High	Pins 1 & 2 closed
	Low	Pins 2 & 3 closed

PARALLEL PORT LPT/IRQ SELECTION
LPT/IRQ		S4/1 LPT1	S4/2 LPT2	S4/3 LPT3	S4/5 IRQ5	S4/6 IRQ7
	Disabled	Off	Off	Off	Off	Off
»	LPT1/IRQ7	On	Off	Off	Off	On
	LPT2/IRQ5	Off	On	Off	On	Off
	LPT/IRQ7	Off	Off	On	Off	On

SERIAL PORT 1 COM/IRQ SELECTION
COM/IRQ		S3/1 COM1	S3/2 COM2	S3/3 COM3	S3/4 COM4	S3/5 IRQ3	S3/6 IRQ4
	Disabled	Off	Off	Off	Off	Off	Off
»	COM1/IRQ4	On	Off	Off	Off	Off	On
	COM2/IRQ3	Off	On	Off	Off	On	Off
	COM3/IRQ4	Off	Off	On	Off	Off	On
	COM4/IRQ3	Off	Off	Off	On	On	Off

SERIAL PORT 2 COM/IRQ SELECTION
COM/IRQ		S2/1 COM1	S2/2 COM2	S2/3 COM3	S2/4 COM4	S2/5 IRQ3	S2/6 IRQ4
	Disabled	Off	Off	Off	Off	Off	Off
	COM1/IRQ4	On	Off	Off	Off	Off	On
»	COM2/IRQ3	Off	On	Off	Off	On	Off
	COM3/IRQ4	Off	Off	On	Off	Off	On
	COM4/IRQ3	Off	Off	Off	On	On	Off