AW: Jornada 720 with 128MB RAM

Hi!
It seems that we need to set two CPU control registers: DRAM =
Configuration
Register MDCNFG (0h A000 0000) and the DRAM Refresh Control Register =
MDREFR
(0h A000 001C).
In the MDCNFG we have to set DRAC00,DRAC01,DRAC02 to 1,1,0
In the MDREFR we have to set to account 8k of refresh-adresses i think.
I hope someone can explain me in which part of the kernel source code i =
can
set the CPU control registers or implement code to do that.

Regards
Stefan




-----Urspr=FCngliche Nachricht-----
Von: [email protected] [mailto:[email protected]] =
Im
Auftrag von Robert Swindells
Gesendet: Montag, 21. Oktober 2019 13:11
An: Stefan Lehner
Cc: [email protected]
Betreff: Re: Jornada 720 with 128MB RAM


"Stefan Lehner" <[email protected]> wrote:
>My name ist Stefan, i like to upgrade my Jornada 720 to 128MB RAM.=20
>
>I soldered two Samsung K4S511632C-KC75 RAM Chips instead oft the two =
old
>16MB ones on to the RAM/ROM board. So the hardware part is done, the
>J720 boots fine into WinCE and with the hpcboot.exe into NetBSD. But as
>expected only with 32MB available.

The first thing that I would check is whether the required timings
for the new RAM chips are different to the old ones.