Re: [LinkStation_General] Re: increase memory?
----- Original Message -----
From: "irvine_stock" <r_obermeyer@...>
Sent: Thursday, February 10, 2005 4:21 AM
Subject: [LinkStation_General] Re: increase memory?
> Finally got my SDRAM in. I installed both SDRAM's. Same speed and
> type as the originals. Turned the board on and it still works
> fine. :)
> However it does not see the other two SDRAM's. That was pretty much
> expected. The board had to be configured for 32 bits somehow. I
> confirmed it is connected up as either 32 bit or 64 bit.
> One 1K resistor decides if its 64Mbytes or 128Mbytes. The resistor
> in forces 32 bit mode. Taking the resistor out forces 64 bit mode.
> Well 64bit mode only makes the unit hang until the watchdog timer
> kills the power. No uart access at all.
> Couple of possibilities I see at this point.
> 1) The firmware does not allow 64 bit mode.
> 2) I didn't get it into 64 bit mode.
> 3) SDRAM could be bad or soldered wrong. (not likely)
> Since the Kuro/HG does support 4 SDRAM's it could still be either 1
> or 2. Will have to spend some more time researching other
> possibilities. Trying to use my wiggler on the JTAG to access the
> memory and decode if the memory size is changing right.
> During this execise I also confirmed that the Flash @IC18 is used as
> 8 bit, not 16 as I saw reported somewhere (I think here).
> To much misinformation is reported. If you don't know then don't
> say you do know. Say your guessing or your sons girlfiend who is a
> biology major thinks so. :-)
> Yes the flash is a 16 bit part but its shorted to byte mode. Its
> chip select is connected to RCS0 for access. The flash at IC19 (if
> installed) is connected up in parallel with the exception it uses
> RCS1 for access. So both parts can be installed together. If more
> Flash is needed it looks pretty simple to solder it in. But they
> both are still 8 bit.
Any progress on the SDRAM upgrade to 128MB?