386SX25/20/16 Motherboard Settings and Configuration

UNIDENTIFIED

386SX25/20/16

Processor
80386SX
Processor Speed
16/20/25MHz
Chip Set
OPTI
Max. Onboard DRAM
16MB
Cache
None
BIOS
AMI
Dimensions
223mm x 218mm
I/O Options
None
NPU Options
80387SX

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

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Monitor type select monochrome
JP1
Open

Monitor type select color
JP1
Closed
»
CMOS memory normal operation
JP3
pins 2 & 3 closed

CMOS memory clear
JP3
pins 1 & 2 closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Parity (P-2)
Bank 3
Parity (P-3)
1MB
(2) 256K x 9
(2) 256K x 9
NONE
NONE
NONE
NONE
1MB
NONE
NONE
(4) 44256
(2) 41256
(4) 44256
(2) 41256
2MB
(2) 256K x 9
(2) 256K x 9
(4) 44256
(2) 41256
(4) 44256
(2) 41256
3MB
(2) 256K x 9
(2) 256K x 9
(4) 441000
(2) 411000
NONE
NONE
3MB
(2) 1M x 9
NONE
(4) 44256
(2) 41256
(4) 44256
(2) 41256
4MB
(2) 1M x 9
(2) 1M x 9
NONE
NONE
NONE
NONE
4MB
NONE
NONE
(4) 441000
(2) 411000
(4) 441000
(2) 411000
5MB
(2) 1M x 9
(2) 1M x 9
(4) 44256
(2) 41256
(4) 44256
(2) 41256
5MB
(2) 256K x 9
(2) 256K x 9
(4) 441000
(2) 411000
(4) 441000
(2) 411000
6MB
(2) 1M x 9
(2) 1M x 9
(4) 441000
(2) 411000
NONE
NONE
6MB
(2) 1M x 9
NONE
(4) 441000
(2) 411000
(4) 441000
(2) 411000
8MB
(2) 1M x 9
(2) 1M x 9
(4) 441000
(2) 411000
(4) 441000
(2) 411000
10MB
(2) 1M x 9
(2) 4M x 9
NONE
NONE
NONE
NONE
12MB
(2) 4M x 9
NONE
(4) 441000
(2) 411000
(4) 441000
(2) 411000
16MB
(2) 4M x 9
(2) 4M x 9
NONE
NONE
NONE
NONE

DRAM JUMPER CONFIGURATION
Size
JP4
JP5
JP6
JP7
JP8
JP9
1MB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
1MB
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
2MB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
3MB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
3MB
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
4MB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
4MB
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
5MB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
5MB
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
6MB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
6MB
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
8MB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
10MB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
12MB
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
16MB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
Note:Pins designated should be in the closed position.

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386SX25/20/16 Motherboard Settings and Configuration

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Processor	80386SX
Processor Speed	16/20/25MHz
Chip Set	OPTI
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI
Dimensions	223mm x 218mm
I/O Options	None
NPU Options	80387SX

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

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select monochrome	JP1	Open
	Monitor type select color	JP1	Closed
»	CMOS memory normal operation	JP3	pins 2 & 3 closed
	CMOS memory clear	JP3	pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Parity (P-2)	Bank 3	Parity (P-3)
1MB	(2) 256K x 9	(2) 256K x 9	NONE	NONE	NONE	NONE
1MB	NONE	NONE	(4) 44256	(2) 41256	(4) 44256	(2) 41256
2MB	(2) 256K x 9	(2) 256K x 9	(4) 44256	(2) 41256	(4) 44256	(2) 41256
3MB	(2) 256K x 9	(2) 256K x 9	(4) 441000	(2) 411000	NONE	NONE
3MB	(2) 1M x 9	NONE	(4) 44256	(2) 41256	(4) 44256	(2) 41256
4MB	(2) 1M x 9	(2) 1M x 9	NONE	NONE	NONE	NONE
4MB	NONE	NONE	(4) 441000	(2) 411000	(4) 441000	(2) 411000
5MB	(2) 1M x 9	(2) 1M x 9	(4) 44256	(2) 41256	(4) 44256	(2) 41256
5MB	(2) 256K x 9	(2) 256K x 9	(4) 441000	(2) 411000	(4) 441000	(2) 411000
6MB	(2) 1M x 9	(2) 1M x 9	(4) 441000	(2) 411000	NONE	NONE
6MB	(2) 1M x 9	NONE	(4) 441000	(2) 411000	(4) 441000	(2) 411000
8MB	(2) 1M x 9	(2) 1M x 9	(4) 441000	(2) 411000	(4) 441000	(2) 411000
10MB	(2) 1M x 9	(2) 4M x 9	NONE	NONE	NONE	NONE
12MB	(2) 4M x 9	NONE	(4) 441000	(2) 411000	(4) 441000	(2) 411000
16MB	(2) 4M x 9	(2) 4M x 9	NONE	NONE	NONE	NONE

DRAM JUMPER CONFIGURATION
Size	JP4	JP5	JP6	JP7	JP8	JP9
1MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
1MB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
2MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
3MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
3MB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
4MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
4MB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
5MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
5MB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
6MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
6MB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
8MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
10MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
12MB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
16MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
Note:Pins designated should be in the closed position.