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SBC-490

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