The Rockbox iAudio X5/M5/M3 port

Install

Full installation and uninstallation instructions for all supported devices are in the Rockbox manual. M3 instructions are the same as M5/X5 apart from the firmware file name.

Bootloader

The iAudio X5 and M5 have a built-in bootloader which performs the firmware updates and can also access the hard drive via USB. Therefore, the Rockbox bootloader can be very minimalistic, not requiring a USB mode. This also makes it less dangerous to install the Rockbox bootloader, as you can always restore the original by using the iAudio bootloader. The current bootloader is not prepared to coexist with the original firmware. It replaces the original firmware. The mostly-orphaned iAudio bootloader page is here.

Simulator

There are currently simulators for all Rockbox compatible devices. A simulator can be useful for seeing what Rockbox looks and feels like before installing as well as testing out your homemade themes before putting them on your player. They can be found here.

Rockbox Status

At present:

• LCD driver
• Font rendering
• Backlight
• ATA driver 99% (no coldstart detection yet)
• PCF50606 driver (I2C^?)
• PCF50606 driver (RTC)
• ADC driver (PCF50606)
• Button driver (ADC)
• Remote button driver (ADC)
• USB handler
• Power handling 10%
• I2C^? driver
• Remote LCD driver
• Audio ADC/DAC driver
• FM Radio driver
• USB OTG driver 1% (Puts the OTG chip to sleep)

Additional work:

• Reverse engineer USBOTG dataflow and try to write a driver.

Hardware Details

• IaudioX5Info - iAudio X5 General Information and PCB Scans
• IaudioX5HardwareComponents - Hardware Components Overview of the iAudio X5
• PortPinAssignments - Shows what the port pins do
• HardwareSchematics - Hardware Schematics
• IaudioM3Info - iAudio M3 General Information and PCB Scans
• IaudioM3HardwareComponents - Hardware Components Overview of the iAudio M3

Sound Response Curve on the iAudio X5

• Green is the Cowon firmware frequency response
• White is the Rockbox frequency response

Original Firmware Information

Here's some information about the memory layout of the X5 firmware (version 2.07-e):

Name	Base Address	Used
Preloader	0x00000000
Firmware	0x00010000
OF's resources	0x00170000
OF's config	0x003F0000
IRAM	0x10000000
CS1/GPIO1	0x20000000 *
USB controller ?	0x20004000 *
LCD command register	0x20008000 *
LCD data register	0x20008002 *
CS2/IDE	0x20020000
SDRAM	0x30000000
Exception vector table	0x30C00000
MBAR	0x40000000
MBAR2	0x80000000

The M3 firmware (version 1.35-e) seems to use the same memory layout except for the items marked * which do not apply for the M3.

Hex-address is used in RockBox source

See IaudioX5FirmwareDisassembly and IaudioReverseEngineering for more information.

Other Pages of Interest

• IAudioEx5MenuStructure - The layout of the original firmware's menu structure to aid the blind.
• IAudioRuntime - Collection of battery runtime information.