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SBC-490 Motherboard Settings and Configuration







AAEON TECHNOLOGY, INC.

SBC-490

Device Type

Mainboard

Processor

80486SX/SL80486SX/80486DX/SL80486DX/CX486DX2/SGS486DX2/ TI486DX2/ IBM486DX2/AM486DX2/80486DX2/SL80486DX2/AM486DX4/(SL)AM486DX4/ SL80486DX4/ P24D/CXMISC/CX 5X86/IBM 5X86/SGS 5X86/AM X5

Processor Speed

25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz

Chip Set

ALI 1489

Video Chip Set

Trident

Maximum Onboard Memory

128MB (EDO supported)

Maximum Video Memory

2MB

Cache

128/256/512KB

BIOS

Award

Dimensions

338mm x 122mm

I/O Options

Floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, IR connector, PC/104connectors (2)

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

C1

Auxiliary keyboard connector

CN5

Speaker

C2

PC/104 connector

CN6

Reset switch

C3

PC/104 connector

CN7

Green PC connector

C4

IDE interface 2

CN8

Green PC connector

C5

IDE interface 1

CN9

Turbo LED

C6

Floppy drive interface

CN10

Turbo switch

C7

Parallel port

CN11

CPU fan power

C8

VGA feature connector

CN12

Power connector

CN1

Serial port 2

CN13

Serial port 1

CN2

IDE interface LED

JP2

VGA port

CN3

IDE interface LED

JP3

PS/2 mouse port

CN4

IR connector

JP17

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Flash BIOS write protect enabled

JP11

Closed

 

Flash BIOS write protect disabled

JP11

Open

»

CMOS memory normal operation

JP15

Open

 

CMOS memory clear

JP15

Closed

SIMM 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

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) 2M x 36

None

None

None

8MB

(1) 1M x 36

(1) 1M x 36

None

None

9MB

(1) 2M x 36

(1) 256K x 36

None

None

10MB

(1) 2M x 36

(1) 256K x 36

(1) 256K x 36

None

11MB

(1) 2M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

12MB

(1) 2M x 36

(1) 1M x 36

None

None

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

None

12MB

(1) 1M x 36

(1) 2M x 36

None

None

16MB

(1) 4M x 36

None

None

None

16MB

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

None

16MB

(1) 2M x 36

(1) 2M x 36

None

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

SIMM CONFIGURATION (CON'T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

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

20MB

(1) 4M x 36

(1) 1M x 36

None

None

20MB

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

None

32MB

(1) 8M x 36

None

None

None

32MB

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

None

32MB

(1) 4M x 36

(1) 4M x 36

None

None

34MB

(1) 8M x 36

(1) 512K x 36

None

None

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

None

36MB

(1) 1M x 36

(1) 8M x 36

None

None

40MB

(1) 8M x 36

(1) 1M x 36

(1) 1M x 36

None

40MB

(1) 8M x 36

(1) 2M x 36

None

None

40MB

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

48MB

(1) 8M x 36

(1) 4M x 36

None

None

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

None

56MB

(1) 8M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

64MB

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

None

64MB

(1) 8M x 36

(1) 8M x 36

None

None

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

80MB

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

None

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

TAG

128KB

(4) 32K x 8

(1) 32K x 8

256KB

(4) 64K x 8

(1) 32K x 8

512KB

(4) 128K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP12

128KB

Open

256KB

Pins 1 & 2 closed

512KB

Pins 1 & 2, 3 & 4 closed

VIDEO MEMORY CONFIGURATION

Size

Bank 0

Bank 1

1MB

(2) 256K x 16

None

2MB

(2) 256K x 16

(2) 256K x 16

CPU SPEED SELECTION

Speed

JP13

JP14

25MHz

Open

Pins 1 & 2 closed

33MHz

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

40MHz

Pins 3 & 4, 5 & 6 closed

Pins 2 & 3 closed

50iMHz

Open

Pins 1 & 2 closed

50MHz

Pins 1 & 2, 5 & 6 closed

Pins 2 & 3 closed

66iMHz

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

75iMHz

Open

Pins 1 & 2 closed

100iMHz

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

CPU TYPE SELECTION

Type

JP8

80486SX

1 & 2, 19 & 20, 23 & 24, 25 & 26

SL80486SX

1 & 4, 2 & 5, 7 & 10, 8 & 9, 14 & 17, 15 & 18, 19 & 20, 22 & 23, 26 & 27

80486DX

1 & 2, 18 & 21, 19 & 20, 22 & 23, 25 & 26

CX486DX2

1 & 4, 2 & 3, 5 & 8, 7 & 10, 11 & 14, 18 & 21, 22 & 23, 25 & 26

SGS486DX2

1 & 4, 2 & 3, 5 & 8, 7 & 10, 11 & 14, 18 & 21, 22 & 23, 25 & 26

TI486DX2

1 & 4, 2 & 3, 5 & 8, 7 & 10, 11 & 14, 18 & 21, 22 & 23, 25 & 26

IBM486DX2

1 & 4, 2 & 3, 5 & 8, 7 & 10, 11 & 14, 18 & 21, 22 & 23, 25 & 26

80486DX2

1 & 2, 18 & 21, 19 & 20, 22 & 23, 25 & 26

AM486DX4

1 & 2, 3 & 6, 13 & 16, 18 & 21, 19 & 20, 22 & 23, 25 & 26

(SL)AM486DX4

1 & 4, 2 & 5, 8 & 9, 10 & 11, 14 & 17, 18 & 21, 19 & 20, 22 & 23, 26 & 27

P24D

1 & 4, 2 & 5, 8 & 9, 10 & 11, 14 & 17, 18 & 21, 19 & 20, 22 & 23, 26 & 27

P24T

1 & 4, 2 & 5, 7 & 10, 8 & 9, 14 & 17, 15 & 18, 19 & 20, 22 & 23, 26 & 27

CX 5X86

1 & 4, 2 & 5, 8 & 9, 10 & 11, 14 & 17, 18 & 21, 19 & 20, 22 & 23, 25 & 26

IBM 5X86

1 & 4, 2 & 5, 8 & 9, 10 & 11, 14 & 17, 18 & 21, 19 & 20, 22 & 23, 25 & 26

SGS 5X86

1 & 4, 2 & 5, 8 & 9, 10 & 11, 14 & 17, 18 & 21, 19 & 20, 22 & 23, 25 & 26

CX MISC

1 & 4, 2 & 5, 8 & 9, 10 & 11, 14 & 17, 18 & 21, 19 & 20, 23 & 24, 25 & 26

AM X5-133/150

1 & 4, 2 & 5, 8 & 9, 10 & 11, 13, & 16, 14 & 17, 18 & 21, 19 & 20, 22 & 23, 26 & 27

AM X5-160

1 & 2, 18 & 21, 19 & 20, 22 & 23, 25 & 26

AM DE2

1 & 2, 18 & 21, 19 & 20, 22 & 23, 25 & 26

Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION

Voltage

JP1

JP7

3.3v

Pins 1 & 3, 2 & 4 closed

Pins 1 & 3 closed

3.45v

Pins 1 & 3, 2 & 4 closed

Pins 4 & 6 closed

3.6v

Pins 1 & 3, 2 & 4 closed

Pins 3 & 5 closed

4v

Pins 3 & 5, 4 & 6 closed

Open

5v

Pins 1 & 3, 2 & 4 closed

Pins 2 & 4 closed

SERIAL PORT 1 INTERRUPT SELECTION

Serial port 1

Serial port 2

JP18

IRQ3

IRQ4

Pins 1 & 2, 3 & 4 closed

IRQ4

IRQ3

Pins 1 & 3, 2 & 4 closed

IRQ11

IRQ10

Pins 5 & 7, 6 & 8 closed

IRQ10

IRQ11

Pins 5 & 6, 7 & 8 closed

IRQ4

IRQ10

Pins 1 & 3, 7 & 8 closed

IRQ4

IRQ11

Pins 1 & 3, 6 & 8 closed

IRQ3

IRQ10

Pins 1 & 2, 7 & 8 closed

IRQ3

IRQ11

Pins 1 & 2, 5 & 7 closed

IRQ11

IRQ3

Pins 2 & 4, 5 & 6 closed

IRQ11

IRQ4

Pins 3 & 4, 5 & 6 closed

IRQ10

IRQ3

Pins 2 & 4, 5 & 7 closed

IRQ10

IRQ4

Pins 3 & 4, 5 & 7 closed

ON BOARD VGA SELECTION

Setting

JP4

JP5

JP6

Enabled

Closed

Closed

Closed

Disabled

Open

Open

Open

WATCHDOG TIMER SELECTION

Setting

JP16

Disabled

Open

Reset

Pins 5 & 6 closed

IRQ15

Pins 3 & 4 closed

NMI

Pins 1 & 2 closed







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