A3889 Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	25MHz
Chip Set	Headland
Max. Onboard DRAM	8MB
Cache	None
BIOS	AMI
Dimensions	225mm x 220mm
I/O Options	Auxiliary keyboard connector
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JP1	Turbo switch	JP10
Auxiliary keyboard connector	JP2	Speaker	JP11
Turbo LED	JP8	Power LED & keylock	JP12
Reset switch	JP9

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	BIOS type select 27256	JP3	pins 1 & 2 closed
	BIOS type select 27128	JP3	pins 2 & 3 closed
»	Pipeline mode enabled	JP4	pins 1 & 2 closed
	Pipeline mode disabled	JP4	pins 2 & 3 closed
»	Monitor type select monochrome	JP5	Open
	Monitor type select color	JP5	Closed
»	CMOS memory normal operation	JP6	Open
	CMOS memory clear	JP6	Closed

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
1.5MB	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9	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
4.5MB	(2) 1M x 9	(2) 1M x 9	(2) 256K x 9	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