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69 lines
4.3 KiB
Markdown
69 lines
4.3 KiB
Markdown
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---
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title: Feature Bits
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layout: default
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created: 2008-12-31 00:32:38 +0200
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updated: 2008-12-31 00:32:38 +0100
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toc: false
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tags:
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- know-how
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- hardware
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- sandisk
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- sansa
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- fuze
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- features
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- hacking
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---
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The Sansa's have different features for different countries/regions. E.g. the Japanese radio frequencies ranging from 76 to 90 MHz
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are partly used for Police radio and thus it is not allowed to tune to these *forbidden* frequencies.
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SanDisk achieved this by removing the **Japan** region from the Radio region selector. In European models of the FUZE you will
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only find "USA" and "World" as options in this setting.
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Another example is the missing "Hebrew" language for "Arabic" regions and vice-versa.
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Now the exciting part: If you download firmware files of the same version for different regions (e.g. from [daniel.haxx.se](http://daniel.haxx.se/sansa/v2fw.html))
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you'll notice that ALL firmware files have the same checksum. So how does the player decide which features to enable and which to leave disabled?
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As the freaks of the [RockBox](http://rockbox.org/) team pointed out in their [forums](http://forums.rockbox.org/index.php?topic=14064.msg113302#msg113302),
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those feature bits are controlled by the **filename of the firmware file**.
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The *Sansa Updater* of SanDisk seems to download a new firmware and put it into the root of the player named as `fuzp.bin`.
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This way the firmware gets updated without changing any feature-bit. An European player stays an European player.
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BUT, if you name the file `fuzpA.bin`, the player will set the feature bits for the USA and thus the **Japan** radio region
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will become available. If you have the European version without FM radio, you might want to try naming the file `fuzpF.bin`
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to get the FM radio feature. From what I've read, it is only disabled by firmware with the hardware still built-in.
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To get most of your player, you should name the firmware file `fuzpT.bin` so that all feature bits get set.
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Feature overview
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================
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| | F1 | F2 | F3 | F4 | F5 | F6 | F7 | Region |
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|:------:|:----:|:----:|:----:|:----:|:------:|:----:|:----:|:---------------------|
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|A (`41`)| X | | | X | | X | | Americas / World |
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|E (`45`)| | | | X | | | | Europe (no FM radio) |
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|F (`46`)| X | | | X | | | | Europe |
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|G (`47`)| | X | | X | `15` | | | Israel (no FM radio) |
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|H (`48`)| X | X | | X | `15` | | | Israel |
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|M (`4d`)| | | X | X | `17` | | | Arabic (no FM radio) |
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|N (`4e`)| X | | X | X | `17` | | | Arabic |
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|P (`50`)| X | | | X | | X | | ? |
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|S (`53`)| | | | X | | X | | South America? (no FM) |
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|T (`54`)| X | X | X | X | | X | X | TEST mode firmware |
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**Description of the flags** (taken from the rockbox forums)
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* **Flag 1:** By looking at the way it varies, I'd bet that this flag means whether the radio is enabled or not. This seems consistent with bclick's findings.
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* **Flag 2** is only 1 for H, G and the test firmware. bclick reported that, in the m300, H and G were Hebrew and Greek respectively.
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So maybe this is an "allow alternate font" flag or something of the sort. Or, maybe, an option which controls whether Greek/Hebrew are present as options in the language selection dialog.
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* **Flag 3** is only 1 for M, N and the test firmware. Same as above with "Arabic" (as bclick reported).
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* **Flag 4** is always 1, so there's no way of knowing what it means.
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* **Flag 5** is probably the default font/character encoding. I recall bclick reporting that, in the m300, M and N looked "like Arabic" (flag = 17),
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G Greek, and H Hebrew (both flag = 15). All others use the default font. The fact that this is the only flag that the test mode does not set is also worth noting.
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* **Flag 6:** I don't really know. Maybe whether the "high" volume option will appear on the menu?
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*mbirth: might be the "Japan" radio range*
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* **Flag 7** is (quite probably) whether the "test" option will appear on the menu or not. It is only 01 for T, the test firmware.
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