386SX-25 (Model 316) Motherboard Settings and Configuration

CACHE COMPUTERS, INC.

386SX-25 (Model 316)

Processor
80386SX
Processor speed
20/25MHz
Chip Set
OPTI
Max. Onboard DRAM
16MB
Cache
None
BIOS
AMI/Cache
Dimensions
330.2mm x 218.4mm
I/O Options
Bus mouse port, game port, serial ports (2), parallel port, floppy drive interface, IDE interface
NPU options
80387SX

CONNECTIONS
Purpose
Location
Purpose
Location
Auxiliary keyboard
J1
Game port
P3
External battery
J3
Bus mouse port
P4
IDE interface LED
J13
IDE interface
P5
Speaker
J21
Floppy drive interface
P6
Power LED & keylock
J22
Parallel port
P7
Turbo LED
JP3
Reset switch
S1
Serial port 0
P1
Turbo switch
S2
Serial port 1
P2

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
CMOS memory normal operation (internal battery)
JP1
pins 2 & 3 closed

CMOS memory normal operation (external battery)
JP1
Open

CMOS memory clear
JP1
pins 1 & 2 closed
»
Monitor type select color (AMI BIOS)
JP2
Closed

Monitor type select monochrome (AMI BIOS)
JP2
Open
»
Password enabled (Cache BIOS)
JP2
Closed

Password disabled (Cache BIOS)
JP2
Open
»
Floppy drive interface-(P6) enabled
SW1/1
Off

Floppy drive interface-(P6) disabled
SW1/1
On
»
IDE interface-(P5) enabled
SW1/2
Off

IDE interface (P5) disabled
SW1/2
On
»
Serial port 0 (P1) enabled
SW1/3
Off

Serial port 0 (P1) disabled
SW1/3
On
»
Serial port 1 (P2) enabled
SW1/4
Off

Serial port 1 (P2) disabled
SW1/4
On
»
Game port (P3) enabled
SW1/5
Off

Game port (P3) disabled
SW1/5
On
»
Parallel port (P7) enabled
SW1/6
Off

Parallel port (P7) disabled
SW1/6
On
»
Bus mouse port (P4) enabled
SW1/7
Off

Bus mouse port (P4) disabled
SW1/7
On
»
Floppy drive interface (P6) address select 1F0-1F7
W3
Open

Floppy drive interface (P6) address select 170-177
W3
Closed
»
IDE address select 3F1-3F7
W4
Open

IDE address select 371-377
W4
Closed
»
Serial port 0 (P1) address select 3F8-3FF
W5
Open

Serial port 0 (P1) address select 3E8-3EF
W5
Closed
»
Serial port 1 (P2) address select 2F8-2FF
W6
Open

Serial port 1 (P2) address select 2E8-2EF
W6
Closed
»
Parallel port (P7) address select 378-37F
W7
Open

Parallel port (P7) address select 278-27F
W7
Closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
1MB
(2) 256K x 9
(2) 256K x 9
NONE
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
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
9MB
(2) 256K x 9
(2) 256K x 9
(2) 4M x 9
NONE
10MB
(2) 1M x 9
(2) 4M x 9
NONE
NONE
12MB
(2) 1M x 9
(2) 1M x 9
(2) 4M x 9
NONE
16MB
(2) 4M x 9
(2) 4M x 9
NONE
NONE

BUS MOUSE INTERRUPT CONFIGURATION
IRQ
W1
W2
IRQ5
Open
Closed
IRQ2
Closed
Open
None
Open
Open

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386SX-25 (Model 316) Motherboard Settings and Configuration

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Processor	80386SX
Processor speed	20/25MHz
Chip Set	OPTI
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI/Cache
Dimensions	330.2mm x 218.4mm
I/O Options	Bus mouse port, game port, serial ports (2), parallel port, floppy drive interface, IDE interface
NPU options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Auxiliary keyboard	J1	Game port	P3
External battery	J3	Bus mouse port	P4
IDE interface LED	J13	IDE interface	P5
Speaker	J21	Floppy drive interface	P6
Power LED & keylock	J22	Parallel port	P7
Turbo LED	JP3	Reset switch	S1
Serial port 0	P1	Turbo switch	S2
Serial port 1	P2

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	CMOS memory normal operation (internal battery)	JP1	pins 2 & 3 closed
	CMOS memory normal operation (external battery)	JP1	Open
	CMOS memory clear	JP1	pins 1 & 2 closed
»	Monitor type select color (AMI BIOS)	JP2	Closed
	Monitor type select monochrome (AMI BIOS)	JP2	Open
»	Password enabled (Cache BIOS)	JP2	Closed
	Password disabled (Cache BIOS)	JP2	Open
»	Floppy drive interface-(P6) enabled	SW1/1	Off
	Floppy drive interface-(P6) disabled	SW1/1	On
»	IDE interface-(P5) enabled	SW1/2	Off
	IDE interface (P5) disabled	SW1/2	On
»	Serial port 0 (P1) enabled	SW1/3	Off
	Serial port 0 (P1) disabled	SW1/3	On
»	Serial port 1 (P2) enabled	SW1/4	Off
	Serial port 1 (P2) disabled	SW1/4	On
»	Game port (P3) enabled	SW1/5	Off
	Game port (P3) disabled	SW1/5	On
»	Parallel port (P7) enabled	SW1/6	Off
	Parallel port (P7) disabled	SW1/6	On
»	Bus mouse port (P4) enabled	SW1/7	Off
	Bus mouse port (P4) disabled	SW1/7	On
»	Floppy drive interface (P6) address select 1F0-1F7	W3	Open
	Floppy drive interface (P6) address select 170-177	W3	Closed
»	IDE address select 3F1-3F7	W4	Open
	IDE address select 371-377	W4	Closed
»	Serial port 0 (P1) address select 3F8-3FF	W5	Open
	Serial port 0 (P1) address select 3E8-3EF	W5	Closed
»	Serial port 1 (P2) address select 2F8-2FF	W6	Open
	Serial port 1 (P2) address select 2E8-2EF	W6	Closed
»	Parallel port (P7) address select 378-37F	W7	Open
	Parallel port (P7) address select 278-27F	W7	Closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(2) 256K x 9	(2) 256K x 9	NONE	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
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
9MB	(2) 256K x 9	(2) 256K x 9	(2) 4M x 9	NONE
10MB	(2) 1M x 9	(2) 4M x 9	NONE	NONE
12MB	(2) 1M x 9	(2) 1M x 9	(2) 4M x 9	NONE
16MB	(2) 4M x 9	(2) 4M x 9	NONE	NONE

BUS MOUSE INTERRUPT CONFIGURATION
IRQ	W1	W2
IRQ5	Open	Closed
IRQ2	Closed	Open
None	Open	Open