AOpen AK79GMAX User Manual
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AK79G MAX/AK79D MAX

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STBY LED

STBY LED is AOpen’s considerate design that aims at providing you friendly system information. The STBY LED will light up when power is connected to the motherboard. This is a convenient indication for you to check the system power status in many circumstances such as power on/off, stand-bymode and RAM power status during Suspend to RAM mode.

Warning: Do not install or remove the DIMM module or others devices when the STBY LED lights on.

STBY LED

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AK79G MAX/AK79D MAX

 

 

 

 

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Front Panel Connector

 

 

 

 

 

 

 

Attach the power LED, speaker, power and reset switch connectors to the

 

corresponding pins. If you enable “Suspend Mode” item in BIOS Setup, the ACPI

 

& Power LED will keep flashing while the system is in suspend mode.

 

Locate the power switch cable from your ATX housing. It is 2-pinfemale

 

connector from the housing front panel. Plug this connector to the soft-power

 

switch connector marked SPWR.

 

 

 

 

 

 

 

 

 

 

 

Suspend Type

 

ACPI LED

 

Power on Suspend (S1) or Suspend to RAM (S3)

Blinking between green and red.

 

Suspend to Disk (S4)

 

The LED will be turned off

Pin 1

 

1

 

 

1

 

 

 

 

 

 

 

 

 

NC

5VSB

 

SPWR

NC

SPWR

 

 

+5V

ACPI LED-

 

ACPI & PWR

IDE LED

GND

IDE LED

IDE LED

ACPILED

LED

 

+5V

NC

 

 

 

ACPI LED (BLUE)

+5V

ACPI_B

 

GND

GND

 

 

Speaker

Reset

NC

RESET

SPEAKER

GND

 

 

 

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AK79G MAX/AK79D MAX

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ATX Power Connector

The ATX power supply uses 20-pinconnector shown below. Make sure you plug in the right direction.

AC Power Auto Recovery

20-PinPower Connector

A traditional ATX system should remain at power off stage when AC power resumes from power failure. This design is inconvenient for a network server or workstation, without an UPS, that needs to keep power-on.This motherboard implements an AC Power Auto Recovery function to solve this problem.

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AK79G MAX/AK79D MAX

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IDE and Floppy Connector

Connect 34-pinfloppy cable and40-pinIDE cable to floppy connector FDC connector. Be careful of the pin1 orientation. Wrong orientation may cause system damage.

ATA 66/100/133

Pin 1

IDE Connector

 

IDE3

FDD Connector

Pin 1

 

Pin1

Pin 1

 

Pin 1

 

IDE2 (Primary)

 

IDE2 (Secondary)

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AK79G MAX/AK79D MAX

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IDE1 is also known as the primary channel and IDE2 as the secondary channel. Each channel supports two IDE devices that make a total of four devices. In order to work together, the two devices on each channel must be set differently to Master andSlave mode. Either one can be the hard disk or the CDROM. The setting as master or slave mode depends on the jumper on your IDE device, so please refer to your hard disk and CDROM manual accordingly.

This motherboard supports ATA66,ATA100 orATA133 IDE devices. Following table lists the transfer rate of IDE PIO and DMA modes. The IDE bus is16-bit,which means every transfer is two bytes.

Mode

Clock Period

Clock Count

Cycle Time

Data Transfer Rate

 

PIO mode 0

30ns

20

600ns

(1/600ns) x 2byte = 3.3MB/s

PIO mode 1

30ns

13

383ns

(1/383ns) x 2byte = 5.2MB/s

PIO mode 2

30ns

8

240ns

(1/240ns) x 2byte = 8.3MB/s

PIO mode 3

30ns

6

180ns

(1/180ns) x 2byte = 11.1MB/s

PIO mode 4

30ns

4

120ns

(1/120ns) x 2byte = 16.6MB/s

DMA mode 0

30ns

16

480ns

(1/480ns) x 2byte = 4.16MB/s

DMA mode 1

30ns

5

150ns

(1/150ns) x 2byte = 13.3MB/s

DMA mode 2

30ns

4

120ns

(1/120ns) x 2byte = 16.6MB/s

ATA33

30ns

4

120ns

(1/120ns) x 2byte x 2 = 33MB/s

ATA66

30ns

2

60ns

(1/60ns) x 2byte x 2

= 66MB/s

ATA100

20ns

2

40ns

(1/40ns) x 2byte x 2

= 100MB/s

ATA133

15ns

2

30ns

(1/30ns) x 2byte x 2

= 133MB/s

Warning: The specification of the IDE cable is a maximum of 46cm (18 inches); make sure your cable does not exceed this length.

Tip:

1.For better signal quality, it is recommended to set the far end side device to master mode and follow the suggested sequence to install your new device. Please refer to above diagram

2.To achieve the best performance of Ultra DMA 66/100/133 hard disks, a special 80-wires IDE cable for Ultra DMA 66/100/133 is required.

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