80386SX-20/25 Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	16/20/25MHz
Chip Set	C & T
Max. Onboard DRAM	16MB (8MB on external memory card)
Cache	None
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit external memory card
NPU Options	80287/80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J17	Turbo LED	J22
Speaker	J18	External battery	JP30
Reset switch	J19	32-bit external memory card	SL1
Turbo switch	J21

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	NPU disabled (80287)	JP1	Open
	NPU enabled (80287)	JP1	Closed
»	Monitor type select color	JP3	pins 1 & 2 closed
	Monitor type select monochrome	JP3	pins 2 & 3 closed
»	CMOS memory normal operation	JP31	Open
	CMOS memory clear	JP31	Closed

DRAM CONFIGURATION
Size	Bank 0	Parity 0	Bank 1	Parity 1
1MB	(36) 41256	(3) 41256	NONE	(3) 41256
2MB	(36) 41256	(3) 41256	(36) 41256	(3) 41256
4MB	(36) 44256	(3) 41256	NONE	(3) 41256
8MB	(36) 44256	(3) 41256	(36) 44256	(3) 41256

NUMERIC COPROCESSOR CONFIGURATION (80387)
Setting	JP11	JP12
Not installed	Open	Open
Installed	Closed	Closed