Rockbox Archos Recorder 6 Spezifikationen PDF herunterladen (Seite 126)

Chapter 12. Advanced Topics 126

rename your old ﬁrmware ﬁles with names like ajbrec.ajz.old and so on, because it is

possible that the player will load a ﬁle other than the one you intended.

12.4.1 Using ROLO (Rockbox Loader)

Rockbox is able to load and start another ﬁrmware ﬁle without rebooting. You just

“play” a ﬁle with the extension .ajz. This can be used to test new ﬁrmware

versions without deleting your current version.

12.5 Rockbox in Flash

12.5.1 Introduction

When you bought your Recorder, it came with the Archos ﬁrmware in ﬂash ROM.

When you power on your player, this Archos ﬁrmware starts, and then loads an updated

ﬁrmware from disk if present (ajbrec.ajz). An ordinary Rockbox installation only

replaces the on-disk ﬁrmware, leaving the ﬂash ROM contents intact. That means the

Archos ﬁrmware still controls the boot process.

The main reason to change this is to improve the startup time of your player. The

Archos bootloader is rather slow. With Rockbox in ﬂash, your player will boot much

faster, typically in three to ﬁve seconds. Furthermore you might prefer a clean Rockbox

environment, with as little remnants of the Archos software as possible.

Warning: Flashing your player is somewhat dangerous, like programming a mainboard

BIOS, CD/DVD drive ﬁrmware, mobile phone, etc. If the power fails, the chip breaks

while programming or most of all the programming software malfunctions, you’ll have a

dead box. We take no responsibility of any kind, you do that at your own risk. However,

we tried as carefully as possible to bulletproof this code. There are a lot of sanity checks.

If any of them fails, it will not program.

There’s an ultimate safety net to bring back boxes with even completely garbled ﬂash

content: the UART boot mod, which in turn requires the serial mod. With that it’s

possible to reﬂash independently from the outside, even if the ﬂash ROM is completely

erased. This won’t work if you have one of the rare ”ROMless” boxes. These have no

boot ROM and boot directly from ﬂash. If the ﬁrst ≈2KB of the ﬂash ROM are ﬂashed

ok, Minimon can be used for the same purpose.

12.5.2 Terminology and Basic Operation

Firmware: The ﬂash ROM contents as a whole.

Image: One operating software started from there.

The replacement ﬁrmware contains a bootloader and two images. The ﬁrst image is

the permanent rescue software, to be used in case something is wrong with the second

(main) image. In current ﬁrmware ﬁles this ﬁrst image contains Bootbox (see wiki for

details). The second image is what is booted by default. The current ﬁrmware ﬁles

The Rockbox manual Archos Recorder

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Rockbox Archos Recorder 6 Spezifikationen Seite 126