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#rockbox log for 2018-04-19

00:09:39 Quit ZincAlloy (Quit: Leaving.)
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00:14:51CheetahPixiesaratoga: I'm not even aware of one.
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02:29:40CheetahPixieYet another article states it as a hybrid of 8, 16 and 32 bits...
02:29:44CheetahPixie...I can certainly see why.
02:32:30__builtinwhat's the address size?
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17:56:23CheetahPixie__builtin: 24 bits I think. 8mb Harvard segments.
17:56:33CheetahPixieI also found an alternate boot mode for it.
17:56:36CheetahPixieHold vol and plug in
17:56:47CheetahPixie10d6:10d6 Actions Semiconductor Co., Ltd
17:57:12CheetahPixieNot logged on the USB devices list.
17:59:31pamauryCheetahPixie: I haven't followed the entire discussion but the minimum requirement for rockbox to run is at least a 32-bit architecture
18:00
18:00:18pamauryand probably a reasonable gcc port to this architecture
18:01:18CheetahPixieIt does some 32 bit instructions
18:01:27CheetahPixieIt is described as some odd combination of 8, 16 and 32 bits.
18:06:07 Quit pamaury (Ping timeout: 260 seconds)
18:18:36CheetahPixiehttps://pastebin.com/ZbwfbX4h
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19:04:09CheetahPixiehttps://cdn.discordapp.com/attachments/375113703823114251/436572530703335444/unknown.png Some continuing progress.
19:11:32 Join pamaury [0] (~pamaury@rockbox/developer/pamaury)
19:13:27CheetahPixieAnd I think I have a dump.
19:13:35CheetahPixie...64 megabytes is not what I expected, but okay.
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20:01:23CheetahPixieI have access to the flash; just made my first hex mod of the firmware.
20:01:33CheetahPixieMade one character uppercase; I can write code to the device.
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20:17:38CheetahPixie25 minutes and 5 hours post purchase.
20:18:38CheetahPixie...I should post the results on Tumblr or something.
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23:00:20saratogaCheetahPixie: that sounds like its not going to work for rockbox, have you looked at the documentation for the ISA?
23:00:33saratogayou should probably do that before you waste any more time on hardware that won't work
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23:24:32CheetahPixiesaratoga: I do not have that on hand. I however have friends who could help me reverse it.
23:24:50CheetahPixieThe specification does however say that there are 32 bit instructions here.
23:25:40saratogapretty sure its on google
23:25:49saratogawhat was it again?
23:26:01CheetahPixieFlip80251.
23:26:15CheetahPixieTried, didn't find a reference.
23:26:57saratogaCheetahPixie: http://www.keil.com/dd/chip/3644.htm
23:27:47saratogatheres a link to the ISA reference
23:28:00saratogahowever, if they only have 32 bit instructions, that is probably going to be an issue
23:28:22CheetahPixie8, 16 and 32 bit instructions.
23:28:28saratogamost of the codecs at least assume there is some support for working with 64 bit data types
23:28:33saratogasince 32 bit CPUs generally have those
23:29:06saratogaif this is a 16 bit microcontroller with larger address space support and some 32 bit ALU instructions, you probably aren't going to be decoding audio with it, at least not with our codecs
23:29:49saratogai only skimmed that document when you asked last night though, so if you really really want to spend time on this, double check what it is
23:32:35CheetahPixieI wouldn't say that codecs in general require 64, since the ones already on this work just fine.
23:32:38CheetahPixieAlso supports FLAC.
23:33:04saratogaif you write a codec for a 16 bit CPU, and that CPU is fast enough, sure
23:33:28CheetahPixie80 MHz and single-instruction almost everything should be ample enough power.
23:33:43saratogaif you want to write a 16 bit firmware and codecs, you're welcome to do that, but it won't be rockbox
23:34:16CheetahPixieConsidering it has 32 bit instructions as well, I'm probably gonna see how much actually fits.
23:34:20saratoga(well maybe you could adapt some of our lossy codecs, since they can probably work without 64 bit types)
23:34:38CheetahPixieWhat about FLAC and it working on this device?
23:34:47saratogasorry lossless codecs
23:34:54CheetahPixieAnd lossy?
23:35:29saratogacheck and see what the hardware can do
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23:35:46CheetahPixieWait.
23:35:48CheetahPixieIt has an audio DSP.
23:35:59CheetahPixie(Also hardware JPEG decode.)
23:36:32saratogathat would make sense, since the CPU would struggle
23:40:15CheetahPixieWhich would free it up to run the UI.
23:40:43CheetahPixieI think with the 32 bit stuff it *does* have that this may just be possible.
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23:43:17saratogathe dsp makes it much less likely to be possible
23:43:43saratogayou need to find a different device
23:44:43 Quit paulk-gagarine (Ping timeout: 246 seconds)
23:48:58__builtinCheetahPixie: I don't doubt that it's possible to run some sort of custom firmware on it, but it will look nothing like rockbox
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