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Subject: Re: Iriver iFP7xx RAM size

Re: Iriver iFP7xx RAM size

From: nobby nobbs <nobbynobbs_at_gmail.com>
Date: 2005-07-19

On Tue, 19 Jul 2005 00:30:46 +0100, Tomasz Malesinski <tmal@mimuw.edu.pl>
wrote:

> I got confused. First, what did Nobby mean by flash _ram_?
The flash memory used for storing songs.
> Second,
> Dave, do you think that PNX0102 does not have an external RAM
> interface at all or just the audio coprocessor does not have one? If
> the audio coprocessor cannot be easily reprogrammed, then could it be
> just not used in a Rockbox port? Does not the ARM core have enough
> power to decode music itself or do you think that in order to play any
> sound on the player we would have to pass it through the coprocessor?
>
> I know however, that even ignoring the coprocessor, still very little
> is known about the iFP hardware.
>
> On Mon, Jul 18, 2005 at 10:51:17PM +0100, Dave Hooper wrote:
>> They could but that's unlikely ..
>> Actually, the more I google for info about the PNX0102, the more it
>> seems
>> that there is no SDRAM interface after all.. seems that the
>> programmable
>> audio coprocessor built into the core is just flash-programmable. I
>> can't
>> find any mention of workspace or general-use RAM (or progamming notes
>> for
>> the coprocessor) but, I suppose, why not. If that's really true then,
>> without docs, an iFP7xx port would be next to impossible.
>>
>> ----- Original Message -----
>> From: "nobby nobbs" <nobbynobbs@gmail.com>
>> To: "Rockbox development" <rockbox@cool.haxx.se>
>> Sent: Monday, July 18, 2005 10:34 PM
>> Subject: Re: Iriver iFP7xx RAM size
>>
>>
>> >Could a devive like the iFP use flash ram as system ram instead?
>> >On Mon, 18 Jul 2005 22:18:39 +0100, Dave Hooper <dave@beermex.com>
>> wrote:
>> >
>> >>http://www.rockbox.org/twiki/bin/view/Main/IriverFP3XX5XXHardwareComponents
>> >>
>> >>This page suggests that the 5xx series at least already have 8MB
>> SDRAM..
>> >>so a 5xx or 3xx port is already 'feasible'.
>> >>
>> >>The 7xx series CPU has 64KB of SRAM *on the processor*. This is the
>> >>same sort of approach as the coldfire CPU used in the iriver H1xx/H3xx
>> >>series, which have 96KB of SRAM. This is in *addition* to any
>> general
>> >>SDRAM. I am quite certain that the 7xx also has SDRAM - a fully
>> >>functional mp3 player with LCD display and graphical user interface
>> can
>> >>almost certainly not be implemented with just 64K of ram..
>> >>
>> >>d
>> >>
>> >>----- Original Message ----- From: "Tomasz Malesinski"
>> >><tmal@mimuw.edu.pl>
>> >>To: <rockbox@cool.haxx.se>
>> >>Sent: Monday, July 18, 2005 7:54 PM
>> >>Subject: Iriver iFP7xx RAM size
>> >>
>> >>
>> >>>Dan Hollis has recently updated the wiki page:
>> >>>
>> >>>http://www.rockbox.org/twiki/bin/view/Main/WebHome?topic=IriverIfpPort
>> >>>
>> >>>He wrote that iFP7xx players have only 64 kB of RAM. Having analyzed
>> >>>their firmware a bit I am quite sure that beside the PNX0102 internal
>> >>>SRAM they also have much more (probably 1 MB) SDRAM located at
>> >>>0x24000000. Does anyone know for sure what the RAM size is? Has
>> >>>anyone opened an iFP7xx player and noted what chips are inside? This
>> >>>information seems to be quite important for the decision on whether
>> to
>> >>>start porting Rockbox to iFP or not.
>> >>>
>> >>>I do not write to Dan directly, because his email address on his wiki
>> >>>page does not look promising to me (spamtrap?).
>> >>>
>> >>>-- Tomek Malesinski
>> >>>_______________________________________________
>> >>>http://cool.haxx.se/mailman/listinfo/rockbox
>> >>>
>> >>
>> >>_______________________________________________
>> >>http://cool.haxx.se/mailman/listinfo/rockbox
>> >
>> >
>> >
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>>
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Received on Tue Jul 19 15:29:49 2005

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