P486 Motherboard Settings and Configuration

QDI COMPUTER, INC.

P486

Processor
80486SX/80487SX/80486DX
Processor Speed
33MHz
Chip Set
OPTI
Max. Onboard DRAM
64MB
Cache
64/256KB
BIOS
AMI
Dimensions
330mm x 220mm
I/O Options
None
NPU Options
4167

CONNECTIONS
Purpose
Location
Purpose
Location
External battery
J11
Turbo LED
JP11
Power LED & keylock
J20
Reset switch
SW1
Speaker
J21
Turbo switch
SW2

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
CMOS memory normal operation
JP1
pins 2 & 3 closed

CMOS memory clear
JP1
pins 1 & 2 closed
»
Monitor type select monochrome
JP2
Closed

Monitor type select color
JP2
Open
»
Factory configured - do not alter
JP6
Open
»
Oscillator type select double frequency
JP7
pins 2 & 3 closed

Oscillator type select single frequency
JP7
pins 1 & 2 closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
1MB
(4) 256K x 9
NONE
NONE
NONE
2MB
(4) 256K x 9
(4) 256K x 9
NONE
NONE
4MB
(4) 1M x 9
NONE
NONE
NONE
5MB
(4) 256K x 9
(4) 1M x 9
NONE
NONE
8MB
(4) 1M x 9
(4) 1M x 9
NONE
NONE
12MB
(4) 1M x 9
(4) 1M x 9
(1) 1M x 36
NONE
16MB
(4) 1M x 9
(4) 1M x 9
(1) 1M x 36
(1) 1M x 36
16MB
(4) 4M x 9
NONE
NONE
NONE
20MB
(4) 4M x 9
(4) 1M x 9
NONE
NONE
24MB
(4) 1M x 9
(4) 1M x 9
(1) 4M x 36
NONE
24MB
(4) 1M x 9
(4) 4M x 9
(1) 1M x 36
NONE
28MB
(4) 1M x 9
(4) 1M x 9
(1) 1M x 36
(1) 4M x 36
32MB
(4) 4M x 9
(4) 4M x 9
NONE
NONE
36MB
(4) 1M x 9
(4) 4M x 9
(1) 4M x 36
NONE
36MB
(4) 4M x 9
(4) 1M x 9
(1) 4M x 36
NONE
36MB
(4) 4M x 9
(4) 4M x 9
(1) 1M x 36
NONE
40MB
(4) 1M x 9
(4) 1M x 9
(1) 4M x 36
(1) 4M x 36
40MB
(4) 4M x 9
(4) 1M x 9
(1) 4M x 36
(1) 1M x 36
40MB
(4) 1M x 9
(4) 4M x 9
(1) 4M x 36
(1) 1M x 36
40MB
(4) 4M x 9
(4) 4M x 9
(1) 1M x 36
(1) 1M x 36
52MB
(4) 1M x 9
(4) 4M x 9
(1) 4M x 36
(1) 4M x 36
52MB
(4) 4M x 9
(4) 1M x 9
(1) 4M x 36
(1) 4M x 36
52MB
(4) 4M x 9
(4) 4M x 9
(1) 4M x 36
(1) 1M x 36
64MB
(4) 4M x 9
(4) 4M x 9
(1) 4M x 36
(1) 4M x 36

CACHE CONFIGURATION
Size
Bank 0
TAG
Dirty Bit
64KB
(8) 8K x 8
(1) 8K x 8 at U34
(1) 64K x 1 at U45
256KB
(8) 32K x 8
(1) 32K x 8 at U34
(1) 64K x 1 at U45

CACHE JUMPER CONFIGURATION
Size
JP8
JP9
JP10
JP12
64KB
Open
Open
Open
Open
256KB
Open
Closed
Closed
Closed

CPU TYPE CONFIGURATION
Type
JP3
jp4
JP5
80486SX
Open
Open
pins 2 & 3 closed
80487SX
pins 1 & 2 closed
Closed
pins 1 & 2 closed
80486DX
pins 2 & 3 closed
Closed
pins 1 & 2 closed

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P486 Motherboard Settings and Configuration

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Processor	80486SX/80487SX/80486DX
Processor Speed	33MHz
Chip Set	OPTI
Max. Onboard DRAM	64MB
Cache	64/256KB
BIOS	AMI
Dimensions	330mm x 220mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J11	Turbo LED	JP11
Power LED & keylock	J20	Reset switch	SW1
Speaker	J21	Turbo switch	SW2

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	JP1	pins 2 & 3 closed
	CMOS memory clear	JP1	pins 1 & 2 closed
»	Monitor type select monochrome	JP2	Closed
	Monitor type select color	JP2	Open
»	Factory configured - do not alter	JP6	Open
»	Oscillator type select double frequency	JP7	pins 2 & 3 closed
	Oscillator type select single frequency	JP7	pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(4) 256K x 9	NONE	NONE	NONE
2MB	(4) 256K x 9	(4) 256K x 9	NONE	NONE
4MB	(4) 1M x 9	NONE	NONE	NONE
5MB	(4) 256K x 9	(4) 1M x 9	NONE	NONE
8MB	(4) 1M x 9	(4) 1M x 9	NONE	NONE
12MB	(4) 1M x 9	(4) 1M x 9	(1) 1M x 36	NONE
16MB	(4) 1M x 9	(4) 1M x 9	(1) 1M x 36	(1) 1M x 36
16MB	(4) 4M x 9	NONE	NONE	NONE
20MB	(4) 4M x 9	(4) 1M x 9	NONE	NONE
24MB	(4) 1M x 9	(4) 1M x 9	(1) 4M x 36	NONE
24MB	(4) 1M x 9	(4) 4M x 9	(1) 1M x 36	NONE
28MB	(4) 1M x 9	(4) 1M x 9	(1) 1M x 36	(1) 4M x 36
32MB	(4) 4M x 9	(4) 4M x 9	NONE	NONE
36MB	(4) 1M x 9	(4) 4M x 9	(1) 4M x 36	NONE
36MB	(4) 4M x 9	(4) 1M x 9	(1) 4M x 36	NONE
36MB	(4) 4M x 9	(4) 4M x 9	(1) 1M x 36	NONE
40MB	(4) 1M x 9	(4) 1M x 9	(1) 4M x 36	(1) 4M x 36
40MB	(4) 4M x 9	(4) 1M x 9	(1) 4M x 36	(1) 1M x 36
40MB	(4) 1M x 9	(4) 4M x 9	(1) 4M x 36	(1) 1M x 36
40MB	(4) 4M x 9	(4) 4M x 9	(1) 1M x 36	(1) 1M x 36
52MB	(4) 1M x 9	(4) 4M x 9	(1) 4M x 36	(1) 4M x 36
52MB	(4) 4M x 9	(4) 1M x 9	(1) 4M x 36	(1) 4M x 36
52MB	(4) 4M x 9	(4) 4M x 9	(1) 4M x 36	(1) 1M x 36
64MB	(4) 4M x 9	(4) 4M x 9	(1) 4M x 36	(1) 4M x 36

CACHE CONFIGURATION
Size	Bank 0	TAG	Dirty Bit
64KB	(8) 8K x 8	(1) 8K x 8 at U34	(1) 64K x 1 at U45
256KB	(8) 32K x 8	(1) 32K x 8 at U34	(1) 64K x 1 at U45

CACHE JUMPER CONFIGURATION
Size	JP8	JP9	JP10	JP12
64KB	Open	Open	Open	Open
256KB	Open	Closed	Closed	Closed

CPU TYPE CONFIGURATION
Type	JP3	jp4	JP5
80486SX	Open	Open	pins 2 & 3 closed
80487SX	pins 1 & 2 closed	Closed	pins 1 & 2 closed
80486DX	pins 2 & 3 closed	Closed	pins 1 & 2 closed