QUOTE(aspire2oo6 @ Sep 5 2010, 07:53 PM)
For those that confuse with ram here some explaination.
There are total 5 type of memory
1) Sd Memory
2) Nand Memory
3) ROM Memory
4) Internal memory (eMMC)
5) External Memory Card
Nokia N900
It not only has 256 MB of operating memory (SDRAM) but also 768 MB of NAND-based virtual memory (swap), making it 1 Gigabyte in total.
Older symbian phones
Lack of NAND memory thats why you keep getting low memory issue
Nokia N8NAND Memory 512MB
SDRAM Memory 256MB
Nokia N8 isnt that bad either for 512MB ram so practically low ram issue will appear less compare to previous symbian models.
Nokia N900Roofts Memory 2GB NAND Memory 768MBSDRAM Memory 256MB
That what makes N900 a multitasker due to the ram.
Nokia N97NAND Memory 256MB
SDRAM Memory 128 MB
Symbian phones use Flash memory as their principal store of system code and user data. Flash memory is a silicon-based non-volatile storage medium that can be programmed and erased electronically. Flash memory comes in two major types: NOR and NAND. The names refer to their fundamental silicon gate design. Symbian OS phones make best use of both types of Flash through the selection of file systems The built-in system code and applications appear to Symbian software as one large read-only drive, known as the Z: drive. The Z: drive is sometimes known as the ROM image. User data and installed applications reside on the internal, writable C: drive. A typical Symbian phone today will use between 32 and 64 MB of Flash for the code and user data – this is the total ROM budget. Symbian uses many techniques to minimize the code and data sizes within a phone, such as THUMB instruction set, prelinked XIP images, compressed executables, compressed data formats and coding standards that emphasize minimal code size.
NOR Flash
NAND Flash is treated as a block-based disk, rather than randomly addressable memory. Unlike NOR, it does not have any address lines, so cannot appear in the memory map. This means that code cannot execute directly from NAND and it has to be copied into RAM first. This results in the need for extra RAM in a NAND phone compared to a similar NOR device. NAND Flash writes are about 10 times faster than those on NOR Flash. A phone cannot boot directly from NAND. The process is more complex, requiring a set of boot loaders that build upon each other, finally resulting in a few megabytes of core Symbian OS image, the ROM, being loaded into RAM, where it will execute. NAND is also inherently less reliable than NOR. The lower price of NAND compared to NOR makes it attractive for mass-market phone projects, even after taking into account the extra RAM required.
Source :
http://wiki.forum.nokia.com/index.php/Flash_MemoryFor symbian ^1 nokia phones the ram is too low that causes low ram issue.
This explaination is not help those members that want to learn not
for those that will show offSo no offense to anyone.
Ahhhaaaa~~~ read carefully when PRO are showing you wonders..
Hail Nokia for having to bring us godlike multi tasking by having not enough ram to run them in the first place but then give you a godlike FAST and HUGE VIRTUAL MEMORY which BOOST your multi tasking to GODLIKE level...
Hail the PRO for having shown us the door to greatness... HAIL NOKIA...
What was it again? Swap? Virtual Memory? Paging?
What was it yet again?? The GODLIKE feature that only GODLIKE N900 has and nobody else have.
Ah... SUPER DUPER GODLIKE FAST AND SPACIOUS 768MB VIRTUAL MEMORY... I See~~~ and that WAS SUPPOSED TO BOOST MULTI TASKING LEVEL ON N900 TO SUPER DUPER GODLIKE... I see~~~
What was it again that I missed???
I failed my accounting... failing to realise 256+768=1024 which is > 256 alone... ahhhh, but who failed IT....
This post has been edited by andrekua: Sep 5 2010, 09:29 PM