386SX Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	16/20MHz
Chip Set	VLSI
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	J16	External battery	J21
Turbo switch	J19	Speaker	J22
Turbo LED	J20	Power LED & keylock	J23

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Battery select internal	JP2	pins 1 & 2 closed
	Battery select external	JP2	pins 2 & 3 closed
»	Pipeline mode enabled	JP3	Closed
	Pipeline mode disabled	JP3	Open
»	CMOS memory normal operation	JP4	pins 1 & 2 closed
	CMOS memory clear	JP4	pins 2 & 3 closed
»	CPU ready signal select from 82C320	JP6	pins 1 & 2 closed
	CPU ready signal select from NPX	JP6	pins 2 & 3 closed
»	Monitor type select monochrome	JP7	Open
	Monitor type select color	JP7	Closed
»	Maximum bus amperage select 24mA	JP8	Closed
	Maximum bus amperage select 12mA	JP8	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
512KB	(18) 41256	NONE	NONE	NONE
512KB	NONE	NONE	(2) 256K x 9	NONE
1MB	(18) 41256	(18) 41256	NONE	NONE
1MB	NONE	NONE	(2) 256K x 9	(2) 256K x 9
1.5MB	(18) 41256	(18) 41256	(2) 256K x 9	NONE
2MB	(18) 41256	(18) 41256	(2) 256K x 9	(2) 256K x 9
2MB	(18) 411000	NONE	NONE	NONE
3MB	(18) 41256	(18) 41256	(2) 1M x 9	NONE
4MB	(18) 411000	(18) 411000	NONE	NONE
4.5MB	(18) 411000	(18) 411000	(2) 256K x 9	NONE
5MB	(18) 411000	(18) 411000	(2) 256K x 9	(2) 256K x 9
5MB	(18) 41256	(18) 41256	(2) 1M x 9	(2) 1M x 9
6MB	(18) 411000	(18) 411000	(2) 1M x 9	NONE
8MB	(18) 411000	(18) 411000	(2) 1M x 9	(2) 1M x 9
8MB	(18) 414000	NONE	NONE	NONE
8MB	NONE	NONE	(2) 4M x 9	NONE
9MB	(18) 414000	(18) 41256	(2) 4M x 9	NONE
12MB	(18) 411000	(18) 411000	(2) 4M x 9	NONE
16MB	(18) 414000	(18) 414000	NONE	NONE
16MB	NONE	NONE	(2) 4M x 9	(2) 4M x 9

DRAM JUMPER CONFIGURATION
Size	JP5
512KB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
512KB	pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, 17 & 18 closed
1MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
1MB	pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, 17 & 18 closed
1.5MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
2MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
2MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
3MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
4MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
4.5MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
5MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
5MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
6MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
8MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
8MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
8MB	pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, 17 & 18 closed
9MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
12MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
16MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed
16MB	pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, 17 & 18 closed
Note:Each line in this table corresponds to same line in the above DRAM configuration table.