ADVANTAGE! 8000 SERIES 486 (COBRA) Motherboard Settings and Configuration

AST RESEARCH, INC.

ADVANTAGE! 8000 SERIES 486 (COBRA)

(202695-1X1)

Processor
80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor Speed
25/33/50(internal)/66(internal)/100(internal)MHz
Chip Set
Unidentified
Max. Onboard DRAM
128MB
Cache
64/256KB
BIOS
Unidentified
Dimensions
330mm x 218mm
I/O Options
Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), 8514 video pass through, VGA port, riser slot
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
PS/2 mouse port
CN2
External battery
J26
Serial port
CN3
Speaker
J27
Serial port
CN4
Chassis fan power
J28
Parallel port
CN5
Front console LED
J29
VGA port
CN6
Chassis fan power
J32
8514 video pass through connector
J19
IDE interface LED
J40
IDE interface
J22
Riser slot
SL1
Floppy drive interface
J24

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
Factory configured - do not alter
E6
pins 1 & 2 closed
»
CMOS memory normal operation
E8
Open

CMOS memory clear
E8
Closed
»
Video memory enabled
E800
Closed
»
Flash BIOS normal operation
SW1/1
Off

Flash BIOS force update at boot
SW1/1
On
»
Password enabled
SW1/2
On

Password disabled
SW1/2
Off
»
Monitor type select color
SW1/3
On

Monitor type select monochrome
SW1/3
Off
»
Setup access enabled
SW1/4
Off

Setup access disabled
SW1/4
On
»
On board video enabled
SW1/5
On

On board video disabled
SW1/5
Off
»
Factory configured - do not alter
SW1/6
On
»
Factory configured - do not alter
SW1/7
On
»
Factory configured - do not alter
SW1/8
On

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
4MB
(1) 1M x 32
NONE
NONE
NONE
8MB
(1) 2M x 32
NONE
NONE
NONE
8MB
(1) 1M x 32
(1) 1M x 32
NONE
NONE
9MB
(1) 1M x 32
(1) 1M x 32
(1) 256K x 32
NONE
10MB
(1) 1M x 32
(1) 1M x 32
(1) 256K x 32
(1) 256K x 32
12MB
(1) 1M x 32
(1) 1M x 32
(1) 1M x 32
NONE
16MB
(1) 1M x 32
(1) 1M x 32
(1) 1M x 32
(1) 1M x 32
16MB
(1) 4M x 32
NONE
NONE
NONE
17MB
(1) 2M x 32
(1) 2M x 32
(1) 256K x 32
NONE
18MB
(1) 2M x 32
(1) 2M x 32
(1) 256K x 32
(1) 256K x 32
20MB
(1) 2M x 32
(1) 2M x 32
(1) 1M x 32
NONE
24MB
(1) 2M x 32
(1) 2M x 32
(1) 1M x 32
(1) 1M x 32
24MB
(1) 2M x 32
(1) 2M x 32
(1) 2M x 32
NONE
32MB
(1) 2M x 32
(1) 2M x 32
(1) 2M x 32
(1) 2M x 32
32MB
(1) 8M x 32
NONE
NONE
NONE
32MB
(1) 4M x 32
(1) 4M x 32
NONE
NONE
33MB
(1) 4M x 32
(1) 4M x 32
(1) 256K x 32
NONE
34MB
(1) 4M x 32
(1) 4M x 32
(1) 256K x 32
(1) 256K x 32
36MB
(1) 4M x 32
(1) 4M x 32
(1) 1M x 32
NONE
40MB
(1) 4M x 32
(1) 4M x 32
(1) 1M x 32
(1) 1M x 32
40MB
(1) 4M x 32
(1) 4M x 32
(1) 2M x 32
NONE

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
48MB
(1) 4M x 32
(1) 4M x 32
(1) 2M x 32
(1) 2M x 32
48MB
(1) 4M x 32
(1) 4M x 32
(1) 4M x 32
NONE
64MB
(1) 4M x 32
(1) 4M x 32
(1) 4M x 32
(1) 4M x 32
64MB
(1) 8M x 32
(1) 8M x 32
NONE
NONE
66MB
(1) 8M x 32
(1) 8M x 32
(1) 256K x 32
(1) 256K x 32
68MB
(1) 8M x 32
(1) 8M x 32
(1) 1M x 32
NONE
72MB
(1) 8M x 32
(1) 8M x 32
(1) 1M x 32
(1) 1M x 32
72MB
(1) 8M x 32
(1) 8M x 32
(1) 2M x 32
NONE
80MB
(1) 8M x 32
(1) 8M x 32
(1) 2M x 32
(1) 2M x 32
80MB
(1) 8M x 32
(1) 8M x 32
(1) 4M x 32
NONE
96MB
(1) 8M x 32
(1) 8M x 32
(1) 4M x 32
(1) 4M x 32
96MB
(1) 8M x 32
(1) 8M x 32
(1) 8M x 32
NONE
128MB
(1) 8M x 32
(1) 8M x 32
(1) 8M x 32
(1) 8M x 32

CACHE CONFIGURATION
Note: The location and chips sizes of 64/256KB cache is unidentified.

CACHE JUMPER CONFIGURATION
Size
E5
64KB
Open
256KB
Closed

CPU TYPE CONFIGURATION
Type
E1
E2
E3
E10
80486SX (PQFP)
Open
pins 2 & 3 closed
pins 1 & 2 closed
Closed
ODP486SX
Open
pins 2 & 3 closed
pins 1 & 2 closed
Closed
80486DX
Open
pins 1 & 2 closed
pins 1 & 2 closed
Closed
80486DX2
Open
pins 1 & 2 closed
pins 1 & 2 closed
Closed
80486DX2 (WB)
Open
pins 1 & 2 closed
pins 2 & 3 closed
Open
80486DX4
Open
pins 1 & 2 closed
pins 1 & 2 closed
Closed
Pentium Overdrive
Open
pins 2 & 3 closed
pins 2 & 3 closed
Open
Note: E10 is not on all boards.

CPU SPEED CONFIGURATION
Speed
E7
E9
25MHz
pins 1 & 2 closed
Closed
33MHz
pins 2 & 3 closed
Open
50iMHz
pins 1 & 2 closed
Closed
66iMHz
pins 2 & 3 closed
Open
100iMHz
pins 1 & 2 closed
Closed

CPU SPEED CONFIGURATION (80486DX4 ONLY)
Voltage
E4
2x
pins 2 & 3 closed
2.5x
pins 1 & 2 closed
3x
Open

CPU VOLTAGE CONFIGURATION
Voltage
E11
E12
E13
E14
E15
E16
3v Cyrix
2 & 3
2 & 3
2 & 3
2 & 3
Open
1 & 2
3v Intel
1 & 2
1 & 2
1 & 2
1 & 2
Closed
2 & 3
5v Cyrix
2 & 3
2 & 3
2 & 3
2 & 3
Open
Open
5v Intel
1 & 2
1 & 2
1 & 2
1 & 2
Closed
Open
Note: Pins designated should be in the closed position. The location of E12 is unidentified.

VIDEO MEMORY CONFIGURATION
1024KB is factory installed and is not configurable.

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Processor	80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor Speed	25/33/50(internal)/66(internal)/100(internal)MHz
Chip Set	Unidentified
Max. Onboard DRAM	128MB
Cache	64/256KB
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), 8514 video pass through, VGA port, riser slot
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
PS/2 mouse port	CN2	External battery	J26
Serial port	CN3	Speaker	J27
Serial port	CN4	Chassis fan power	J28
Parallel port	CN5	Front console LED	J29
VGA port	CN6	Chassis fan power	J32
8514 video pass through connector	J19	IDE interface LED	J40
IDE interface	J22	Riser slot	SL1
Floppy drive interface	J24

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Factory configured - do not alter	E6	pins 1 & 2 closed
»	CMOS memory normal operation	E8	Open
	CMOS memory clear	E8	Closed
»	Video memory enabled	E800	Closed
»	Flash BIOS normal operation	SW1/1	Off
	Flash BIOS force update at boot	SW1/1	On
»	Password enabled	SW1/2	On
	Password disabled	SW1/2	Off
»	Monitor type select color	SW1/3	On
	Monitor type select monochrome	SW1/3	Off
»	Setup access enabled	SW1/4	Off
	Setup access disabled	SW1/4	On
»	On board video enabled	SW1/5	On
	On board video disabled	SW1/5	Off
»	Factory configured - do not alter	SW1/6	On
»	Factory configured - do not alter	SW1/7	On
»	Factory configured - do not alter	SW1/8	On

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
4MB	(1) 1M x 32	NONE	NONE	NONE
8MB	(1) 2M x 32	NONE	NONE	NONE
8MB	(1) 1M x 32	(1) 1M x 32	NONE	NONE
9MB	(1) 1M x 32	(1) 1M x 32	(1) 256K x 32	NONE
10MB	(1) 1M x 32	(1) 1M x 32	(1) 256K x 32	(1) 256K x 32
12MB	(1) 1M x 32	(1) 1M x 32	(1) 1M x 32	NONE
16MB	(1) 1M x 32	(1) 1M x 32	(1) 1M x 32	(1) 1M x 32
16MB	(1) 4M x 32	NONE	NONE	NONE
17MB	(1) 2M x 32	(1) 2M x 32	(1) 256K x 32	NONE
18MB	(1) 2M x 32	(1) 2M x 32	(1) 256K x 32	(1) 256K x 32
20MB	(1) 2M x 32	(1) 2M x 32	(1) 1M x 32	NONE
24MB	(1) 2M x 32	(1) 2M x 32	(1) 1M x 32	(1) 1M x 32
24MB	(1) 2M x 32	(1) 2M x 32	(1) 2M x 32	NONE
32MB	(1) 2M x 32	(1) 2M x 32	(1) 2M x 32	(1) 2M x 32
32MB	(1) 8M x 32	NONE	NONE	NONE
32MB	(1) 4M x 32	(1) 4M x 32	NONE	NONE
33MB	(1) 4M x 32	(1) 4M x 32	(1) 256K x 32	NONE
34MB	(1) 4M x 32	(1) 4M x 32	(1) 256K x 32	(1) 256K x 32
36MB	(1) 4M x 32	(1) 4M x 32	(1) 1M x 32	NONE
40MB	(1) 4M x 32	(1) 4M x 32	(1) 1M x 32	(1) 1M x 32
40MB	(1) 4M x 32	(1) 4M x 32	(1) 2M x 32	NONE

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
48MB	(1) 4M x 32	(1) 4M x 32	(1) 2M x 32	(1) 2M x 32
48MB	(1) 4M x 32	(1) 4M x 32	(1) 4M x 32	NONE
64MB	(1) 4M x 32	(1) 4M x 32	(1) 4M x 32	(1) 4M x 32
64MB	(1) 8M x 32	(1) 8M x 32	NONE	NONE
66MB	(1) 8M x 32	(1) 8M x 32	(1) 256K x 32	(1) 256K x 32
68MB	(1) 8M x 32	(1) 8M x 32	(1) 1M x 32	NONE
72MB	(1) 8M x 32	(1) 8M x 32	(1) 1M x 32	(1) 1M x 32
72MB	(1) 8M x 32	(1) 8M x 32	(1) 2M x 32	NONE
80MB	(1) 8M x 32	(1) 8M x 32	(1) 2M x 32	(1) 2M x 32
80MB	(1) 8M x 32	(1) 8M x 32	(1) 4M x 32	NONE
96MB	(1) 8M x 32	(1) 8M x 32	(1) 4M x 32	(1) 4M x 32
96MB	(1) 8M x 32	(1) 8M x 32	(1) 8M x 32	NONE
128MB	(1) 8M x 32	(1) 8M x 32	(1) 8M x 32	(1) 8M x 32

CPU TYPE CONFIGURATION
Type	E1	E2	E3	E10
80486SX (PQFP)	Open	pins 2 & 3 closed	pins 1 & 2 closed	Closed
ODP486SX	Open	pins 2 & 3 closed	pins 1 & 2 closed	Closed
80486DX	Open	pins 1 & 2 closed	pins 1 & 2 closed	Closed
80486DX2	Open	pins 1 & 2 closed	pins 1 & 2 closed	Closed
80486DX2 (WB)	Open	pins 1 & 2 closed	pins 2 & 3 closed	Open
80486DX4	Open	pins 1 & 2 closed	pins 1 & 2 closed	Closed
Pentium Overdrive	Open	pins 2 & 3 closed	pins 2 & 3 closed	Open
Note: E10 is not on all boards.

CPU SPEED CONFIGURATION
Speed	E7	E9
25MHz	pins 1 & 2 closed	Closed
33MHz	pins 2 & 3 closed	Open
50iMHz	pins 1 & 2 closed	Closed
66iMHz	pins 2 & 3 closed	Open
100iMHz	pins 1 & 2 closed	Closed

CPU SPEED CONFIGURATION (80486DX4 ONLY)
Voltage	E4
2x	pins 2 & 3 closed
2.5x	pins 1 & 2 closed
3x	Open

CPU VOLTAGE CONFIGURATION
Voltage	E11	E12	E13	E14	E15	E16
3v Cyrix	2 & 3	2 & 3	2 & 3	2 & 3	Open	1 & 2
3v Intel	1 & 2	1 & 2	1 & 2	1 & 2	Closed	2 & 3
5v Cyrix	2 & 3	2 & 3	2 & 3	2 & 3	Open	Open
5v Intel	1 & 2	1 & 2	1 & 2	1 & 2	Closed	Open
Note: Pins designated should be in the closed position. The location of E12 is unidentified.