[maemo-users] Does N770 have a REAL memory limit to 64MB?

From: Ryan Pavlik abiryan at ryand.net
Date: Mon Oct 29 23:14:52 EET 2007
Ádrian Lívio wrote:
> Mike Yue escreveu:
>> When I booted the N770 from internal flash memory, I couldn't run as 
>> many apps as I booted from MMC card, so I thought the MMC card had 
>> already done the job extending the real memory.
>> But, seems I was wrong.
>> Now my N770 is booted from MMC card ext2 partition(around 450MB). From 
>> command "top", I can see only 64M memory there, and over 95% used:
>> Mem: 60672K used, 1552K free, 0K shrd, 872K buff, 27736K Cached.
>> From command "df", I can see the root filesystem(/dev/mmcblk0p2 is the 
>> MMC card partition ext2, now mounted to /)
>> Filesystem         1k-blocks         Used             Available     
>> Use%  Mounted on
>> /dev/mmcblk0p2     464324            158407           281945        
>> 36%   /
>> So, I am wondering if it is possible to extend the REAL memory to MMC 
>> card, and if someone has done that job?
>> BTW, as the article(howto_easily_boot_from_mmc_card) said, the N770 
>> should run much faster than booting from internal flash memory, but I 
>> don't see that difference. Did I do something wrong?
>> Thanks for your attentions, and appreciate for any replies.
>> Mike
> Look the table from 
> http://www.forum.nokia.com/main/platforms/maemo/index.html#featured
> The 770 haves 64M of RAM memory. The use of the mmc card expands the 
> memory avaliable to install programs (128M). Then using the MMC you got 
> more spaces to install application, but you yet have the same memory to 
> run programs.
> []s
This is not an accurate statement.  The MMC card offers additional file 
storage (it shows up in applications and the File manager).  
Additionally, you can enable "extend virtual memory" which offers a sort 
of "swap space" which lets you run more applications at once (extending 
the 64mb built in ram with a slower flash-backed "hard drive").  Using a 
standard 770, you cannot increase the amount of space to _install_ 
applications: this is limited to 128.

Booting from MMC (a rather complicated, advanced maneuver) lets you 
install as many applications as will fit on the MMC card you purchased - 
in this case, I believe the card will _not_ show up as "Removable Memory 
Card" in the file manager or applications, as it is essentially serving 
as the system's internal 'hard drive'-type device.

Ryan Pavlik
AbiWord Win32 Platform Maintainer, Art Lead: www.abisource.com
AbiWord Community Outreach Project: www.cleardefinition.com/oss/abi/blog/

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was largely inspired by the original UNIX foundations that were
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