Rockbox mail archiveSubject: Re: Iriver iFP7xx RAM size
Re: Iriver iFP7xx RAM size
From: Tomasz Malesinski <tmal_at_mimuw.edu.pl>
Date: Tue, 19 Jul 2005 01:30:46 +0200
I got confused. First, what did Nobby mean by flash _ram_? 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_at_gmail.com>
> To: "Rockbox development" <rockbox_at_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_at_beermex.com> wrote:
> >>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..
> >>----- Original Message ----- From: "Tomasz Malesinski"
> >>To: <rockbox_at_cool.haxx.se>
> >>Sent: Monday, July 18, 2005 7:54 PM
> >>Subject: Iriver iFP7xx RAM size
> >>>Dan Hollis has recently updated the wiki page:
> >>>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
> >Using Opera's revolutionary e-mail client: http://www.opera.com/mail/
-- Tomek Malesiński _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockboxReceived on 2005-07-19