ADVANTAGE PLUS! SERIES 486 (MT) Motherboard Settings and Configuration

AST RESEARCH, INC.

ADVANTAGE PLUS! SERIES 486 (MT)

(202528-101)

Processor
80486SX/80487SX/ODP486/ODPR486/80486DX/80486DX2/P24T
Processor Speed
25/33/50(internal)/66(internal)MHz
Chip Set
Unidentified
Max. Onboard DRAM
64MB
Cache
64/256KB
BIOS
AST
Dimensions
355mm x 305mm
I/O Options
Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), 8514 video pass through connector, VGA port
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
VGA port
CN1
Reset switch
E3
Serial port
CN2
IDE interface LED
E4
Serial port
CN3
8514 video pass through connector
J19
PS/2 mouse port
CN4
IDE interface
J22
Parallel port
CN5
Floppy drive interface
J24
Power LED
E1
Chassis fan power
J28

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
CMOS memory normal operation
E5
Open

CMOS memory clear
E5
Closed
»
Factory configured - do not alter
E14
Pins 1 & 2 closed
»
Parallel port IRQ select IRQ7
E15
Pins 1 & 2 closed

Parallel port IRQ select IRQ5
E15
Pins 2 & 3 closed
»
Factory configured - do not alter
E800
Pins 2 & 3 closed
»
Factory configured - do not alter
E801
Pins 1 & 2 closed
»
Monitor power conservation disabled
E802
Pins 2 & 3 closed

Monitor power conservation enabled
E802
Pins 1 & 2 closed
»
Factory configured - do not alter
E803
Pins 1 & 2 closed
»
Factory configured - do not alter
E804
Pins 1 & 2 closed
»
On board video enabled
SW1/1
Off

On board video disabled
SW1/1
On
»
Factory configured - do not alter
SW1/2
Off
»
Flash BIOS normal operation
SW1/3
Off

Flash BIOS force update at boot
SW1/3
On
»
Password enabled
SW1/4
Off

Password disabled
SW1/4
On
»
Monitor type select color
SW1/5
On

Monitor type select monochrome
SW1/5
Off
»
Factory configured - do not alter
SW1/6
Off
»
Factory configured - do not alter
SW1/7
Off
»
Setup access enabled
SW1/8
Off

Setup access disabled
SW1/8
On

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
1MB
(1) 256K x 36
None
None
None
2MB
(1) 256K x 36
(1) 256K x 36
None
None
3MB
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
None
4MB
(1) 1M x 36
None
None
None
4MB
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
5MB
(1) 1M x 36
(1) 256K x 36
None
None

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
6MB
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
None
7MB
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
8MB
(1) 1M x 36
(1) 1M x 36
None
None
9MB
(1) 1M x 36
(1) 1M x 36
(1) 256K x 36
None
10MB
(1) 1M x 36
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
12MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
None
13MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 256K x 36
16MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
16MB
(1) 4M x 36
None
None
None
17MB
(1) 4M x 36
(1) 256K x 36
None
None
18MB
(1) 4M x 36
(1) 256K x 36
(1) 256K x 36
None
19MB
(1) 4M x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
20MB
(1) 4M x 36
(1) 1M x 36
None
None
21MB
(1) 4M x 36
(1) 1M x 36
(1) 256K x 36
None
22MB
(1) 4M x 36
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
24MB
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
None
28MB
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
32MB
(1) 4M x 36
(1) 4M x 36
None
None
33MB
(1) 4M x 36
(1) 4M x 36
(1) 256K x 36
None
34MB
(1) 4M x 36
(1) 4M x 36
(1) 256K x 36
(1) 256K x 36
36MB
(1) 4M x 36
(1) 4M x 36
(1) 1M x 36
None
37MB
(1) 4M x 36
(1) 4M x 36
(1) 1M x 36
(1) 256K x 36
40MB
(1) 4M x 36
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
48MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
None
49MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 256K x 36
52MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 1M x 36
64MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36

CACHE CONFIGURATION
Size
Bank 0
TAG
64KB
(8) 8K x 8
(1) 8K x 9
256KB
(8) 32K x 8
(1) 32K x 9

CACHE JUMPER CONFIGURATION
Size
E6
E7
E8
None
Pins 1 & 2 closed
Open
Open
64KB
Pins 1 & 2 closed
Open
Open
256KB
Pins 2 & 3 closed
Closed
Closed

CPU TYPE CONFIGURATION
Type
E9
E10
E11
E12
E13
80486SX
Open
2 & 3
1 & 2
Open
2 & 3
80487SX
1 & 2
1 & 2
2 & 3
Closed
2 & 3
ODP486
1 & 2
1 & 2
2 & 3
Closed
2 & 3
ODPR486
2 & 3
1 & 2
1 & 2
Closed
2 & 3
80486DX
2 & 3
1 & 2
1 & 2
Closed
2 & 3
80486DX2
2 & 3
1 & 2
1 & 2
Closed
2 & 3
P24T
1 & 2
1 & 2
2 & 3
Closed
1 & 2
Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION
Speed
E16
25MHz
Open
33MHz
Closed
50iMHz
Open
66iMHz
Closed

VIDEO MEMORY CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
512KB
(1) 256K x 16
None
None
1MB
(1) 256K x 16
(1) 256K x 16
None
2MB
(1) 256K x 16
(1) 256K x 16
(2) 256K x 16
Note: Bank 0 is factory installed and is not configurable.

MISCELLANEOUS TECHNICAL NOTE
Note: The location of pin 1 is unidentified.

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Processor	80486SX/80487SX/ODP486/ODPR486/80486DX/80486DX2/P24T
Processor Speed	25/33/50(internal)/66(internal)MHz
Chip Set	Unidentified
Max. Onboard DRAM	64MB
Cache	64/256KB
BIOS	AST
Dimensions	355mm x 305mm
I/O Options	Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), 8514 video pass through connector, VGA port
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
VGA port	CN1	Reset switch	E3
Serial port	CN2	IDE interface LED	E4
Serial port	CN3	8514 video pass through connector	J19
PS/2 mouse port	CN4	IDE interface	J22
Parallel port	CN5	Floppy drive interface	J24
Power LED	E1	Chassis fan power	J28

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	CMOS memory normal operation	E5	Open
	CMOS memory clear	E5	Closed
»	Factory configured - do not alter	E14	Pins 1 & 2 closed
»	Parallel port IRQ select IRQ7	E15	Pins 1 & 2 closed
	Parallel port IRQ select IRQ5	E15	Pins 2 & 3 closed
»	Factory configured - do not alter	E800	Pins 2 & 3 closed
»	Factory configured - do not alter	E801	Pins 1 & 2 closed
»	Monitor power conservation disabled	E802	Pins 2 & 3 closed
	Monitor power conservation enabled	E802	Pins 1 & 2 closed
»	Factory configured - do not alter	E803	Pins 1 & 2 closed
»	Factory configured - do not alter	E804	Pins 1 & 2 closed
»	On board video enabled	SW1/1	Off
	On board video disabled	SW1/1	On
»	Factory configured - do not alter	SW1/2	Off
»	Flash BIOS normal operation	SW1/3	Off
	Flash BIOS force update at boot	SW1/3	On
»	Password enabled	SW1/4	Off
	Password disabled	SW1/4	On
»	Monitor type select color	SW1/5	On
	Monitor type select monochrome	SW1/5	Off
»	Factory configured - do not alter	SW1/6	Off
»	Factory configured - do not alter	SW1/7	Off
»	Setup access enabled	SW1/8	Off
	Setup access disabled	SW1/8	On

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(1) 256K x 36	None	None	None
2MB	(1) 256K x 36	(1) 256K x 36	None	None
3MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	None
4MB	(1) 1M x 36	None	None	None
4MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
5MB	(1) 1M x 36	(1) 256K x 36	None	None

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
6MB	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36	None
7MB	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
8MB	(1) 1M x 36	(1) 1M x 36	None	None
9MB	(1) 1M x 36	(1) 1M x 36	(1) 256K x 36	None
10MB	(1) 1M x 36	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	None
13MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 256K x 36
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 4M x 36	None	None	None
17MB	(1) 4M x 36	(1) 256K x 36	None	None
18MB	(1) 4M x 36	(1) 256K x 36	(1) 256K x 36	None
19MB	(1) 4M x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
20MB	(1) 4M x 36	(1) 1M x 36	None	None
21MB	(1) 4M x 36	(1) 1M x 36	(1) 256K x 36	None
22MB	(1) 4M x 36	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36
24MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	None
28MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
32MB	(1) 4M x 36	(1) 4M x 36	None	None
33MB	(1) 4M x 36	(1) 4M x 36	(1) 256K x 36	None
34MB	(1) 4M x 36	(1) 4M x 36	(1) 256K x 36	(1) 256K x 36
36MB	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36	None
37MB	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36	(1) 256K x 36
40MB	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	None
49MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 256K x 36
52MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36

CACHE CONFIGURATION
Size	Bank 0	TAG
64KB	(8) 8K x 8	(1) 8K x 9
256KB	(8) 32K x 8	(1) 32K x 9

CACHE JUMPER CONFIGURATION
Size	E6	E7	E8
None	Pins 1 & 2 closed	Open	Open
64KB	Pins 1 & 2 closed	Open	Open
256KB	Pins 2 & 3 closed	Closed	Closed

CPU TYPE CONFIGURATION
Type	E9	E10	E11	E12	E13
80486SX	Open	2 & 3	1 & 2	Open	2 & 3
80487SX	1 & 2	1 & 2	2 & 3	Closed	2 & 3
ODP486	1 & 2	1 & 2	2 & 3	Closed	2 & 3
ODPR486	2 & 3	1 & 2	1 & 2	Closed	2 & 3
80486DX	2 & 3	1 & 2	1 & 2	Closed	2 & 3
80486DX2	2 & 3	1 & 2	1 & 2	Closed	2 & 3
P24T	1 & 2	1 & 2	2 & 3	Closed	1 & 2
Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION
Speed	E16
25MHz	Open
33MHz	Closed
50iMHz	Open
66iMHz	Closed

VIDEO MEMORY CONFIGURATION
Size	Bank 0	Bank 1	Bank 2
512KB	(1) 256K x 16	None	None
1MB	(1) 256K x 16	(1) 256K x 16	None
2MB	(1) 256K x 16	(1) 256K x 16	(2) 256K x 16
Note: Bank 0 is factory installed and is not configurable.