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#1 2008-11-13 21:40:17

FreeSmiler
New member
Registered: 2008-11-13
Posts: 3

DNS-313 RAM upgrade

After installing CharminBaer's Debian lenny port and Samba daemon, my device has about 5Mb of free RAM. So, I'm thinking of hardware upgrade.  According to specifications of SL3512 chip, it supports upto 256MByte 16-bit 333MHz (PC2700) of external DDR SDRAM. Are there any software limitations, or if I solder another compatible memory chip, the kernel will recognize it? Anyone tried to extend memory?

By the way, thanks CharminBaer for firmware.

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#2 2008-11-13 23:33:21

eak
Member
Registered: 2007-11-01
Posts: 16

Re: DNS-313 RAM upgrade

If you succeed in that modification maby I should try i to. but sldering ram chips sounds realy hard. because those are realy small. maby they are ball grid to?

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#3 2008-11-13 23:54:50

FreeSmiler
New member
Registered: 2008-11-13
Posts: 3

Re: DNS-313 RAM upgrade

No, chips are packaged in TSOP II, like on old DDR memory modules for PC. You can find some info regarding memory upgrade on Asus WL500. That project was successful.

Upd:
I've found the following line in the \var\log\dmesg

Code:

Kernel command line: root=/dev/sda3 rw mem=32M console=ttySL0,19200 initrd=0x00800000,8M ramdisk_size=8192

So, this line contains description of available amount of RAM and we should rewrite it to correspond upgraded hardware. But I don't know, how to do it. Which program module contain this text - bootloader in DataFlash or it is placed somewhere in the kernel?

Last edited by FreeSmiler (2008-11-14 21:10:49)

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#4 2008-11-14 21:49:43

radir
Member
Registered: 2008-01-03
Posts: 68

Re: DNS-313 RAM upgrade

FreeSmiler wrote:

After installing CharminBaer's Debian lenny port and Samba daemon, my device has about 5Mb of free RAM. So, I'm thinking of hardware upgrade.  According to specifications of SL3512 chip, it supports upto 256MByte 16-bit 333MHz (PC2700) of external DDR SDRAM. Are there any software limitations, or if I solder another compatible memory chip, the kernel will recognize it? Anyone tried to extend memory?

By the way, thanks CharminBaer for firmware.

Some ideas you may find useful: http://forum.dsmg600.info/t2388-128MB-U … tails.html

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#5 2008-11-23 14:43:03

pcp
Member
From: Moravistan
Registered: 2008-04-23
Posts: 75

Re: DNS-313 RAM upgrade

FreeSmiler wrote:

No, chips are packaged in TSOP II, like on old DDR memory modules for PC. You can find some info regarding memory upgrade on Asus WL500. That project was successful.

Upd:
I've found the following line in the \var\log\dmesg

Code:

Kernel command line: root=/dev/sda3 rw mem=32M console=ttySL0,19200 initrd=0x00800000,8M ramdisk_size=8192

So, this line contains description of available amount of RAM and we should rewrite it to correspond upgraded hardware. But I don't know, how to do it. Which program module contain this text - bootloader in DataFlash or it is placed somewhere in the kernel?

this is a compile-time option. you need to recompile the whole kernel to change it - but don't worry, i've did it many times wink

nice idea, but i'm not sure if i'll be so courageous to try it. i've soldered serial port output to the box, but the RAM chip is another level of lunacy. smile

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