V20L-486 ALL IN ONE Motherboard Settings and Configuration

ACER, INC.

V20L-486 ALL IN ONE

Processor
AM486SX/80486SX/AM486DX/80486DX/CX486DX2/AM486DX2/ 80486DX2/80486DX4/P24D/P24T
Processor Speed
25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Chip Set
ALI
Video Chip Set
None
Maximum Onboard Memory
Unidentified
Maximum Video Memory
None
Cache
128/256/512KB
BIOS
Unidentified
Dimensions
330mm x 218mm
I/O Options
32-bit VESA local bus slot, floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2)
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Serial port 2
CN1
Power LED & keylock
CN9/pins 1 - 4
Serial port 1
CN2
Reset switch
CN9/pins 7 & 8
Parallel port
CN3
Power LED & keylock
CN10/pins 1 - 5
Floppy drive interface
CN4
Speaker
CN10/pins 7 - 10
IDE interface 1
CN5
Turbo LED
CN10/pins 12 & 13
IDE interface 2
CN6
Turbo switch
CN10/pins 15 - 17
PS/2 mouse port
CN7
Reset switch
CN10/pins 19 & 20
IDE interface LED
CN8
32-bit VESA local bus slot
SL1

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
Password disabled
J1
Pins 2 & 3 closed

Password enabled
J1
Pins 1 & 2 closed
»
Factory configured - do not alter (OEM BIOS enabled)
J2
Pins 2 & 3 closed
»
M5115 I/O enabled
J8
Pins 1 & 2 closed

M5115 I/O disabled
J8
Pins 2 & 3 closed
»
Factory configured - do not alter
J10
Unidentified
»
Local bus IDE I/O address select 0FXH
J11
Pins 1 & 2 closed

Local bus IDE I/O address select 07XH
J11
Pins 2 & 3 closed
»
Local bus IDE enabled
J12
Pins 2 & 3 closed

Local bus IDE disabled
J12
Pins 1 & 2 closed
»
Factory configured - do not alter
J22
Unidentified

Reset switch enabled
J23
Pins 1 & 2 closed

Reset switch disabled
J23
Pins 2 & 3 closed

Green PC connector enabled
J24
Pins 1 & 2 closed

Green PC connector disabled
J24
Pins 2 & 3 closed

Factory configured - do not alter
J41
Pins 2 & 3 closed

DRAM CONFIGURATION
Note: The maximum amount of memory is unidentified.

CACHE CONFIGURATION
Size
Bank 0
Bank 1
TAG
128KB
(4) 32K x 8
None
(1) 32K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8
512KB
(4) 128K x 8
None
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
J13
J15
J16
128KB
Pins 2 & 3 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
256KB
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 2 & 3 closed
512KB
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed

CPU SPEED SELECTION
Speed
JP17
JP21
25MHz
Pins 1 & 5 closed
Pins 2 & 3 closed
33MHz
Pins 2 & 6 closed
Pins 2 & 3 closed
40MHz
Pins 3 & 7 closed
Pins 1 & 2 closed
50iMHz
Pins 1 & 5 closed
Pins 2 & 3 closed
50MHz
Pins 4 & 8 closed
Pins 1 & 2 closed
66iMHz
Pins 2 & 6 closed
Pins 2 & 3 closed
75iMHz
Pins 1 & 5 closed
Pins 2 & 3 closed
100iMHz
Pins 2 & 6 closed
Pins 2 & 3 closed

CPU TYPE SELECTION
Type
J20
J26
J27
J33
J34
J35
J37
AM486SX
1 & 2
1 & 2
1 & 2
1 & 3
2 & 3
2 & 3
2 & 3
80486SX
1 & 2
2 & 3
2 & 3
1 & 3
2 & 3
2 & 3
2 & 3
AM486DX
1 & 2
1 & 2
1 & 2
1 & 3
2 & 3
2 & 3
2 & 3
80486DX
1 & 2
2 & 3
2 & 3
1 & 3
2 & 3
2 & 3
2 & 3
CX486DX2
1 & 2
2 & 3
Open
2 & 4
1 & 2
2 & 3
1 & 2
AM486DX2
1 & 2
1 & 2
1 & 2
1 & 3
2 & 3
2 & 3
2 & 3
80486DX2
1 & 2
2 & 3
2 & 3
1 & 3
2 & 3
2 & 3
2 & 3
80486DX4
1 & 2
2 & 3
2 & 3
1 & 3
2 & 3
2 & 3
2 & 3
P24D
2 & 3
2 & 3
2 & 3
1 & 3
2 & 3
1 & 2
2 & 3
P24T
2 & 3
2 & 3
2 & 3
1 & 3
2 & 3
1 & 2
2 & 3
Note: Pins designated should be in the closed position.

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Processor	AM486SX/80486SX/AM486DX/80486DX/CX486DX2/AM486DX2/ 80486DX2/80486DX4/P24D/P24T
Processor Speed	25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Chip Set	ALI
Video Chip Set	None
Maximum Onboard Memory	Unidentified
Maximum Video Memory	None
Cache	128/256/512KB
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slot, floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 2	CN1	Power LED & keylock	CN9/pins 1 - 4
Serial port 1	CN2	Reset switch	CN9/pins 7 & 8
Parallel port	CN3	Power LED & keylock	CN10/pins 1 - 5
Floppy drive interface	CN4	Speaker	CN10/pins 7 - 10
IDE interface 1	CN5	Turbo LED	CN10/pins 12 & 13
IDE interface 2	CN6	Turbo switch	CN10/pins 15 - 17
PS/2 mouse port	CN7	Reset switch	CN10/pins 19 & 20
IDE interface LED	CN8	32-bit VESA local bus slot	SL1

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Password disabled	J1	Pins 2 & 3 closed
	Password enabled	J1	Pins 1 & 2 closed
»	Factory configured - do not alter (OEM BIOS enabled)	J2	Pins 2 & 3 closed
»	M5115 I/O enabled	J8	Pins 1 & 2 closed
	M5115 I/O disabled	J8	Pins 2 & 3 closed
»	Factory configured - do not alter	J10	Unidentified
»	Local bus IDE I/O address select 0FXH	J11	Pins 1 & 2 closed
	Local bus IDE I/O address select 07XH	J11	Pins 2 & 3 closed
»	Local bus IDE enabled	J12	Pins 2 & 3 closed
	Local bus IDE disabled	J12	Pins 1 & 2 closed
»	Factory configured - do not alter	J22	Unidentified
	Reset switch enabled	J23	Pins 1 & 2 closed
	Reset switch disabled	J23	Pins 2 & 3 closed
	Green PC connector enabled	J24	Pins 1 & 2 closed
	Green PC connector disabled	J24	Pins 2 & 3 closed
	Factory configured - do not alter	J41	Pins 2 & 3 closed

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
128KB	(4) 32K x 8	None	(1) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8
512KB	(4) 128K x 8	None	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	J13	J15	J16
128KB	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
256KB	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
512KB	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed

CPU SPEED SELECTION
Speed	JP17	JP21
25MHz	Pins 1 & 5 closed	Pins 2 & 3 closed
33MHz	Pins 2 & 6 closed	Pins 2 & 3 closed
40MHz	Pins 3 & 7 closed	Pins 1 & 2 closed
50iMHz	Pins 1 & 5 closed	Pins 2 & 3 closed
50MHz	Pins 4 & 8 closed	Pins 1 & 2 closed
66iMHz	Pins 2 & 6 closed	Pins 2 & 3 closed
75iMHz	Pins 1 & 5 closed	Pins 2 & 3 closed
100iMHz	Pins 2 & 6 closed	Pins 2 & 3 closed

CPU TYPE SELECTION
Type	J20	J26	J27	J33	J34	J35	J37
AM486SX	1 & 2	1 & 2	1 & 2	1 & 3	2 & 3	2 & 3	2 & 3
80486SX	1 & 2	2 & 3	2 & 3	1 & 3	2 & 3	2 & 3	2 & 3
AM486DX	1 & 2	1 & 2	1 & 2	1 & 3	2 & 3	2 & 3	2 & 3
80486DX	1 & 2	2 & 3	2 & 3	1 & 3	2 & 3	2 & 3	2 & 3
CX486DX2	1 & 2	2 & 3	Open	2 & 4	1 & 2	2 & 3	1 & 2
AM486DX2	1 & 2	1 & 2	1 & 2	1 & 3	2 & 3	2 & 3	2 & 3
80486DX2	1 & 2	2 & 3	2 & 3	1 & 3	2 & 3	2 & 3	2 & 3
80486DX4	1 & 2	2 & 3	2 & 3	1 & 3	2 & 3	2 & 3	2 & 3
P24D	2 & 3	2 & 3	2 & 3	1 & 3	2 & 3	1 & 2	2 & 3
P24T	2 & 3	2 & 3	2 & 3	1 & 3	2 & 3	1 & 2	2 & 3
Note: Pins designated should be in the closed position.