[vdr] Re: Increasing SDRAM on DVB cards

[Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>]

Martin Kemper wrote:
> 
> ...
> >> for this layout, it is clear that A0 - A10 MUST be allready wired to the DSP
> >> and if we/you get an replacing part, simple look for an which can do
> >> on bit more on the COLUMN mode and you have your 4mb
> >>
> but the datacheat say on page 19:
> The SDRAM must be 16-bits wide. The `AV7110 provides control signals for up to two SDRAMs.
> Any combination of 4 or 16 Mbit SDRAMs may be used, provided they total at least 16 Mbits. Other
> supported sizes and configurations are:
> 16 Mbit ? one 16 Mbit SDRAM
> 20 Mbit ? one 16 Mbit and one 4 Mbit SDRAM
> 32 Mbit ? two 16 Mbit SDRAM
> 
> so you cound not use one big  sdram.
> ...
> >> with this no change to the hardware decoder would be needed
> >> but only somebody with knowledge of the firmewareinternals
> >> can answer and help here !
> >>
> on Page 19:
> The two chip selects correspond to the following address ranges:
> SCS1 ? 0xCC00 0000 - 0xCC1F FFFF
> SCS2 ? 0xCC20 0000 - 0xCDFF FFFF
> so each has a range of 2Mbyte

Well, thanks for pointing out this page - I guess I must have been
blind so far, not to have seen this...

So basically this means that we definitely need access to SCS2, otherwise
we can flat out forget about this.

Klaus
-- 
_______________________________________________________________

Klaus Schmidinger                       Phone: +49-8635-6989-10
CadSoft Computer GmbH                   Fax:   +49-8635-6989-40
Hofmark 2                               Email:   kls@cadsoft.de
D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de
_______________________________________________________________


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