Precision 386SX/16, Precision 386SX/25 Motherboard Settings and Configuration

DELL COMPUTER CORPORATION

Precision 386SX/16, Precision 386SX/25

Processor
80386SX
Processor Speed
16/25MHz
Chip Set
VLSI
Max. Onboard DRAM
16MB
Cache
None
BIOS
AMI
Dimensions
330mm x 218mm
I/O Options
Bus mouse port, floppy interface, IDE interface, parallel port, serial ports (2), VGA port
NPU Options
80387SX

CONNECTIONS
Purpose
Location
Purpose
Location
Internal battery holder
BAT
Bus mouse
MSE
Serial port 1
COM1
Power LED & keylock
PLK
Serial port 2
COM2
Reset switch
RST
Floppy drive interface
FDD
Speaker
SPK
IDE interface LED
HDL
Turbo LED
TLD
IDE interface
IDE
VGA port
VGA
Parallel port
LPT

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
VGA interrupt request select none
JP1
pins 1 & 2 closed

VGA interrupt request select IRQ9
JP1
pins 2 & 3 closed
»
VGA port enabled
JP2
pins 1 & 2 closed

VGA port disabled
JP2
pins 2 & 3 closed
»
IDE drives installed select one
JP3
pins 1 & 2 closed

IDE drives installed select two
JP3
pins 2 & 3 closed
»
Pipeline mode enabled
JP4
pins 2 & 3 closed

Pipeline mode disabled
JP4
pins 1 & 2 closed
»
Floppy drive interface disk change signal disabled
JP5
pins 1 & 2 closed

Floppy drive interface disk change signal enabled
JP5
pins 2 & 3 closed
»
Monitor type select color
JP6
pins 1 & 2 closed

Monitor type select monochrome
JP6
pins 2 & 3 closed
»
CMOS memory normal operation
JP7
pins 2 & 3 closed

CMOS memory clear
JP7
pins 1 & 2 closed
»
Monitor type select standard VGA
SW1/1
Off

Monitor type select NEC MultiSync I (only)
SW1/1
On
»
Monitor type select PS/2 style VGA
SW1/2
On

Monitor type select AT style VGA
SW1/2
Off
»
Monitor type select 1024 x 768 interlaced
SW1/5
On

Monitor type select 1024 x 768 non-interlaced
SW1/5
Off

DRAM CONFIGURATION
Size
Bank 0
Bank 1
512KB
(2) 256K x 9
NONE
1MB
(2) 256K x 9
(2) 256K x 9
2MB
(2) 1M x 9
NONE
2.5MB
(2) 1M x 9
(2) 256K x 9
4MB
(2) 1M x 9
(2) 1M x 9
8MB
(2) 4M x 9
NONE
8.5MB
(2) 4M x 9
(2) 256K x 9
10MB
(2) 4M x 9
(2) 1M x 9
16MB
(2) 4M x 9
(2) 4M x 9
Note:The on-board VGA interface will not function with less than 1MB of DRAM installed

VGA REFRESH CONFIGURATION
Refresh rate
SW1/3
SW1/4
»
800 x 600 x 16 at 56Hz or 800 x 600 x 256 at 56Hz
On
On

800 x 600 x 16 at 72Hz or 800 x 600 x 256 at 56Hz
On
Off

800 x 600 x 16 at 60Hz or 800 x 600 x 256 at 60Hz
Off
On

800 x 600 x 16 at 72Hz or 800 x 600 x 256 at 60Hz
Off
Off

VRAM CONFIGURATION
Size
Bank 0
256KB
NONE
512KB
(2) 44256 ZIPPs

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Precision 386SX/16, Precision 386SX/25 Motherboard Settings and Configuration

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Processor	80386SX
Processor Speed	16/25MHz
Chip Set	VLSI
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	Bus mouse port, floppy interface, IDE interface, parallel port, serial ports (2), VGA port
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Internal battery holder	BAT	Bus mouse	MSE
Serial port 1	COM1	Power LED & keylock	PLK
Serial port 2	COM2	Reset switch	RST
Floppy drive interface	FDD	Speaker	SPK
IDE interface LED	HDL	Turbo LED	TLD
IDE interface	IDE	VGA port	VGA
Parallel port	LPT

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	VGA interrupt request select none	JP1	pins 1 & 2 closed
	VGA interrupt request select IRQ9	JP1	pins 2 & 3 closed
»	VGA port enabled	JP2	pins 1 & 2 closed
	VGA port disabled	JP2	pins 2 & 3 closed
»	IDE drives installed select one	JP3	pins 1 & 2 closed
	IDE drives installed select two	JP3	pins 2 & 3 closed
»	Pipeline mode enabled	JP4	pins 2 & 3 closed
	Pipeline mode disabled	JP4	pins 1 & 2 closed
»	Floppy drive interface disk change signal disabled	JP5	pins 1 & 2 closed
	Floppy drive interface disk change signal enabled	JP5	pins 2 & 3 closed
»	Monitor type select color	JP6	pins 1 & 2 closed
	Monitor type select monochrome	JP6	pins 2 & 3 closed
»	CMOS memory normal operation	JP7	pins 2 & 3 closed
	CMOS memory clear	JP7	pins 1 & 2 closed
»	Monitor type select standard VGA	SW1/1	Off
	Monitor type select NEC MultiSync I (only)	SW1/1	On
»	Monitor type select PS/2 style VGA	SW1/2	On
	Monitor type select AT style VGA	SW1/2	Off
»	Monitor type select 1024 x 768 interlaced	SW1/5	On
	Monitor type select 1024 x 768 non-interlaced	SW1/5	Off

DRAM CONFIGURATION
Size	Bank 0	Bank 1
512KB	(2) 256K x 9	NONE
1MB	(2) 256K x 9	(2) 256K x 9
2MB	(2) 1M x 9	NONE
2.5MB	(2) 1M x 9	(2) 256K x 9
4MB	(2) 1M x 9	(2) 1M x 9
8MB	(2) 4M x 9	NONE
8.5MB	(2) 4M x 9	(2) 256K x 9
10MB	(2) 4M x 9	(2) 1M x 9
16MB	(2) 4M x 9	(2) 4M x 9
Note:The on-board VGA interface will not function with less than 1MB of DRAM installed

VGA REFRESH CONFIGURATION
Refresh rate		SW1/3	SW1/4
»	800 x 600 x 16 at 56Hz or 800 x 600 x 256 at 56Hz	On	On
	800 x 600 x 16 at 72Hz or 800 x 600 x 256 at 56Hz	On	Off
	800 x 600 x 16 at 60Hz or 800 x 600 x 256 at 60Hz	Off	On
	800 x 600 x 16 at 72Hz or 800 x 600 x 256 at 60Hz	Off	Off

VRAM CONFIGURATION
Size	Bank 0
256KB	NONE
512KB	(2) 44256 ZIPPs