[vdr] Re: Increasing SDRAM on DVB cards

[Hermann Gausterer <mrq1@gmx.net>]

> Hermann Gausterer wrote:
> > 
> > ...
> > the scs2 is allready routed to the osd ram chip ... i hope the
> > HY57V161610D is the one used for OSD and not the other
> > but i read today somewhere which chip is used for what
> 
> I don't think so. Look a little closer at page 20 of the AV7110
> data sheet. CC000000-CC1FFFFF is the range of the existing 2MB
> of SDRAM, and in _that_ range there is some OSD memory allocated

yep i see this, but this is not an absolut, but insteed an relativ value
on the top it says "SIZE" .. calc the adresses on the left to get
the real values ;-)

you told me yourself that the av7110 uses two chips, one for OSD
and one for A/V .. that does absolutly match the doku .. and it
says clearly that the OSD ram chip is selected with the
mystical SCS2 ;-)

> (see the middle of the drawing). The actual sizes of each memory
> area (B-Frame, OSD, Video- and Audio-Buffer) can be set at runtime,
> and that's where the firmware has traded OSD memory for Video-Buffer
> memory several times in the past.

no .. on the graph, OSD is always above CC20:0000 and so on,
on chip 2 !

> The remark "(OSD/User Data)" just tells us what that memory area
> can be used for, but right now, since that memory isn't physically
> there, the only OSD memory we have is in the lower 2MB of SDRAM.

you told me that there are two chips .. how does this fit togehter?
for what is the other 2mb chip for? it can not be connected anywhere
else on the av7110 !

please read my other post (reply to oliver) too
(ok, i am shure you do it anyway ;-)

hermann

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