MODEL 3279-16XX PC916SX (REV. 03-92) Motherboard Settings and Configuration

Processor	80386SX (exact location unidentified)
Processor Speed	16MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	None
Maximum Video Memory	None
Cache	None
BIOS	Unidentified
Dimensions	Unidentified
I/O Options	None
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J2	Speaker	J4
Power LED & keylock	J3	Auxiliary keyboard connector	J5

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	JP3	Unidentified
»	Monitor type select color	S1	Left
	Monitor type select monochrome	S1	Right
»	Power on frequency speed select 16MHz	S2	Left
	Power on frequency speed select 8MHz	S2	Right
»	Wait state select 4 wait states	SW3/1	Off
	Wait state select 3 wait states	SW3/1	On
»	Auto switch enabled	SW3/2	Off
	8MHz mode enabled	SW3/2	On
»	0 - 512KB enabled	SW3/3	Off
	0 - 256KB enabled/256KB - 512KB disabled	SW3/3	On
»	512KB - 1MB enabled	SW3/4	Off
	512KB - 1MB disabled	SW3/4	On

DRAM MEMORY MAPPING SELECTION
External memory		Mapping area	SW3/5	SW3/6	SW3/7	SW3/8
	0MB	Not selected	On	On	On	On
»	0MB	100000H - 16000H	Off	On	On	On
	1MB	200000H - 26000H	On	Off	On	On
	2MB	300000H - 36000H	Off	Off	On	On
	3MB	400000H - 46000H	On	On	Off	On
	4MB	500000H - 56000H	Off	On	Off	On
	5MB	600000H - 66000H	On	Off	Off	On
	6MB	700000H - 76000H	Off	Off	Off	On
	7MB	800000H - 86000H	On	On	On	Off
	8MB	900000H - 96000H	Off	On	On	Off
	9MB	A00000H - A60000H	On	Off	On	Off
	10MB	B00000H - B60000H	Off	Off	On	Off
	11MB	C00000H - C60000H	On	On	Off	Off
	12MB	D00000H - D60000H	Off	On	Off	Off
	13MB	E00000H - E60000H	On	Off	Off	Off
	14MB	F00000H - F60000H	Off	Off	Off	Off
Note: The memory is located on the mainboard.

WAITSTATES AT DMA TRANSFERS SELECTION
IOW/MEMR/MEMW		IOR	JP1	JP2
	250ns	500ns	Pins 2 & 3 closed	Pins 2 & 3 closed
»	500ns	750ns	Pins 2 & 3 closed	Pins 1 & 2 closed
	750ns	1000ns	Pins 1 & 2 closed	Pins 2 & 3 closed
	1000ns	1250ns	Pins 1 & 2 closed	Pins 1 & 2 closed