L386SX CPU (REV. B) Motherboard Settings and Configuration

TEXAS MICRO, INC.

L386SX CPU (REV. B)

Device Type	Single board computer
Processor	AM386SX/80386SX
Processor Speed	Unidentified
Chip Set	Unidentified
Video Chip Set	Unidentified
Maximum Onboard Memory	16MB
Maximum Video Memory	Unidentified
Cache	64KB
BIOS	Unidentified
Dimensions	338mm x 122mm
I/O Options	Floppy drive interface, IDE interface, parallel port, serial ports (2)
NPU options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 1	CN1	External battery	JP1
Parallel port	CN2	IDE interface LED	JP7
Keyboard connector	CN3	Auxiliary keyboard connector	JP12
IDE interface	J1	Video board connector	JP14
Floppy drive interface	J2	Video board connector	JP16
Serial port 2	J3

USER CONFIGURABLE SETTINGS
Function		Label	Position
	On board battery enabled	JP1	Pins 1 & 2 closed
	On board battery disabled	JP1	Pins 2 & 3 closed
	Watchdog timer enabled	JP13	Pins 1 & 2 closed
	Watchdog timer disabled	JP13	Pins 2 & 3 closed
»	Factory configured - do not alter	JP17	Pins 2 & 3 closed
»	Factory configured - do not alter	JP18	Pins 2 & 3 closed
»	Factory configured - do not alter	JP19	Open
»	Factory configured - do not alter	JP20	Pins 1 & 2 closed
»	Factory configured - do not alter	JP21	Pins 1 & 2 closed
»	Monitor type select color	SW1/1	On
	Monitor type select monochrome	SW1/1	Off
	Flash memory enabled	SW1/2	Off
	Flash memory disabled	SW1/2	On
»	CMOS memory normal operation	SW1/3	Off
	CMOS memory clear	SW1/3	On
	I/O address select 270H	SW1/4	Off
	I/O address select 370H	SW1/4	On
Note: The location of JP19, JP20 & JP21 are unidentified.

CACHE CONFIGURATION

Note: The location of the cache is unidentified.

VIDEO MEMORY CONFIGURATION

Note: The location of the video memory is unidentified.