Develop Bugs

Is it possible, to have much more RAM available in Roms

A year of 7 ago I owned an IPAQ 3780. On that device you could change the amount of memory and storage. More memory and less storage or otherwise.
According to the HTC website, the HTC diamond has:
ROM: 256 MB
RAM: 192 MB DDR SDRAM
Internal storage: 4 GB
Most roms with TF3D enabled have around 60MB ram left after booting.
Still it makes me wonder why we can't change that amount by making the internal storage smaller and add it to the memory. The device comes with a 4GB internal storage, so what is the point of having a large 'standard' storage. It is not that difficult to move pointers to 'my documents' to 'internal storage\my documents' etc.
But asking this, i think Rom builders already know there is a reason why the RAM can't be enlarged.
Please enlight me with the answer or start discussing how to build such a rom.

That's impossible, absolute different technologies in RAM and storage.. And btw, 64MB of RAM is used for video acceleration, and 60MB goes to Windows Mobile..

In your old Ipaq storage and memory were the same. When the battery was empty all your data was lost. Only the os was kept in the rom. Since Windows Mobile 5 all your saved data is in the rom - and cannot be lost when the battery is empty.
so you can not enlarge the rom by decreasing the ram - its completely different hardware.

Yep, those were the days of WM3 where that was an option to the end user. Even if such an option existed today, how many would actually subtracted the storage for more ram? Well, every user is different. The way I use Ram vs. Rom on this device is basically straight down the middle.
To each is own! The trick here is to work with what we have. I think we aren't doing to bad at all!

charlie42 said:
That's impossible, absolute different technologies in RAM and storage.. And btw, 64MB of RAM is used for video acceleration, and 60MB goes to Windows Mobile..
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Oke, that answers it.
Though 64MB for video acceleration is a huge buffer for this 640*480 pixels screen. Stealing memory there?

xavalon said:
Oke, that answers it.
Though 64MB for video acceleration is a huge buffer for this 640*480 pixels screen. Stealing memory there?
Click to expand...
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Kindly check this thread:
http://forum.xda-developers.com/showthread.php?t=402747

Where is my memory?

My AT&T Tilt2, using Energy Rom now:
on the Hardware information tab, I see RAM Size: 288 MB， Flash Size 512 MB，and Storage Size 241.6 MB。
But, on the Memery/Main tab: Storage Total is 241.6 MB, and Program Total is 183.47 MB。
I think the RAM is used for Program, while the flash mem is for Storage. Then, my question is where the other memory is?

If you have a stock rom, the at&t bloatware takes up the majority of it.
I flash mine with a custom rom, which rids the phone of the bloat/crapware.
I also flash to a no manila version, which takes out the touchflo3d graphics, which I don't use, and that gives you more ram/memory/storage.

jrm163 said:
My AT&T Tilt2:
on the Hardware information tab, I see RAM Size: 288 MB， Flash Size 512 MB，and Storage Size 241.6 MB。
But, on the Memery/Main tab: Storage Total is 241.6 MB, and Program Total is 183.47 MB。
I think the RAM is used for Program, while the flash mem is for Storage. Then, my question is where the other memory is?
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Those Storage and Program Totals are more-or-less the same with most ROMS....not that I've tried most ROMs but a sampling.
For example, on my Valky ROM the Storage Total is 271 MB and the Program Total is 181 MB.

I am not using the stock ROM now. Originally I thought it was the Stock ROM that has some function like ghost, which enables the OS to restore completely. Obviously I was wrong.
p51d007 said:
If you have a stock rom, the at&t bloatware takes up the majority of it.
I flash mine with a custom rom, which rids the phone of the bloat/crapware.
I also flash to a no manila version, which takes out the touchflo3d graphics, which I don't use, and that gives you more ram/memory/storage.
Click to expand...
Click to collapse

You are right. But where is the missing memery? What are they used for?
MCbrian said:
Those Storage and Program Totals are more-or-less the same with most ROMS....not that I've tried most ROMs but a sampling.
For example, on my Valky ROM the Storage Total is 271 MB and the Program Total is 181 MB.
Click to expand...
Click to collapse

What is it you think is missing?
The Hardware Information tab also list OS Program Memory under RAM and OS Memory under Flash size. The Memory Main tab doesn't list these totals, but they are in use by the OS.

The 288MB of RAM does indeed exist in your device, but the way the OS uses it makes much less of it appear in the Memory dialogue, as much of the RAM is not usable for programs (so there's no point in displaying it). 32MB of the 288MB is part of the baseband, and cannot actually be used for programs. Anywhere from around 8MB to 24MB of RAM is part of the Page Pool, which is somewhat like a HDD memory cache in Windows. In addition, some RAM is used for the framebuffer, the radio stack, and the XIP (OS kernel), among many other things.
There is an article on MSDN, written by the Windows Mobile team, which goes into slightly more detail about how RAM is actually used on a Windows Mobile device. But the short answer is that Windows Mobile uses a lot of RAM for critical, low-level functions which have RAM reserved for them. Windows Mobile decides it shouldn't display RAM that will never be used for running userspace applications, so the RAM displayed on the Memory applet is often much less than the actual hardware RAM present in the device.

DaveTheTytnIIGuy said:
the short answer is that Windows Mobile uses a lot of RAM for critical, low-level functions which have RAM reserved for them. Windows Mobile decides it shouldn't display RAM that will never be used for running userspace applications, so the RAM displayed on the Memory applet is often much less than the actual hardware RAM present in the device.
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Thanks much for the explanation and the link to more explanation. I knew I'd read months ago...somewhere...that there was a good, non-mysterious explanation, but didn't spend the time to find it.

Does yourDesire Hd really have 768 RAM????

Sorry if this is a noob question, this is my first android phone and do not fully understand android of yet.
Basically going to settings >>> Applications >>> Running services.
At the bottom of that screen you see Other : a mb Available b mb + c mb in 46
I understand one is memory used by essential processes, available and memory which can be freed up but what i don't understand is why it does not add up 768? and only around 520 mb?

Some of you RAM is taken up by the HTC Fast Boot feature. Around 80~100MB is used.

in adb shell type free and it will show around 630MB available, the rest is used for Radio and GPU

andyharney said:
Some of you RAM is taken up by the HTC Fast Boot feature. Around 80~100MB is used.
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Click to collapse
so disabling fastboot is advised?

Why? Do you really need the 768MB of RAM? What are you running? Photoshop? 768MB RAM is enough for a loooong time!

BazookaAce said:
Why? Do you really need the 768MB of RAM? What are you running? Photoshop? 768MB RAM is enough for a loooong time!
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It's not a question of needing, I was just enlarging my knowledge on the subject.

Gurps777 said:
It's not a question of needing, I was just enlarging my knowledge on the subject.
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Theoretically, it is possible. Try it out and see what happens and report back. However, it is also possible that the device saves some ram for hardware acceleration/graphics memory like the HD2 did...

[Q] memory (RAM) size

Hi,
obvious question (but didn't find an answer): Accroding to http://www.htc.com/www/smartphones/htc-desire-z/#specs it should have 512MB RAM right? Why the actual amount of memory is significantly lower? Free in terminal shows only 386048000 bytes which less than 370MiB. Why? Free should show actuall memory on which the underlining linux is running, right? So there shouldn't be any other hidden memory.
Thanks.

LAMER_CZ said:
Hi,
obvious question (but didn't find an answer): Accroding to http://www.htc.com/www/smartphones/htc-desire-z/#specs it should have 512MB RAM right? Why the actual amount of memory is significantly lower? Free in terminal shows only 386048000 bytes which less than 370MiB. Why? Free should show actuall memory on which the underlining linux is running, right? So there shouldn't be any other hidden memory.
Thanks.
Click to expand...
Click to collapse
Free memory is how much memory isn't being used by the system, files, apps, etc., that being what is available to write to; total memory is the combination of used and free memory.
Sent from my HTC Vision using XDA App

LAMER_CZ said:
Hi,
obvious question (but didn't find an answer): Accroding to http://www.htc.com/www/smartphones/htc-desire-z/#specs it should have 512MB RAM right? Why the actual amount of memory is significantly lower? Free in terminal shows only 386048000 bytes which less than 370MiB. Why? Free should show actuall memory on which the underlining linux is running, right? So there shouldn't be any other hidden memory.
Thanks.
Click to expand...
Click to collapse
I had the same question too
The answer is that part of the memory is used by the sistem itself.

Yeah, part of the memory is reserved for the radio, and probably some other system stuff too. So when Android boots up it only sees around 370MB or so. This is the same on both the G2 and DZ.
Sent from my Desire Z running CM7.

Other stuff.. and something like "Graphics Card" i think.

Hm, hm ..... so 512MB is just marketing. 1GB phone has effectively almost 3x more memory Desire Z is awesome phone (it has HW keyboard), but the memory is a huge disappointment, what would cost extra 512MB these days? Almost nothing ..... grrrrr
steviewevie said:
Yeah, part of the memory is reserved for the radio, and probably some other system stuff too. So when Android boots up it only sees around 370MB or so. This is the same on both the G2 and DZ.
Sent from my Desire Z running CM7.
Click to expand...
Click to collapse

A 1GB device would show about 874988KB in RAM. Or about 854MB.

[Q] why only 350 mb ram is available when the specifications show 512 mb ram

why only 350 mb ram is available when the specifications say 512 mb ram is there in galaxy w

Because part of the RAM is reserved for OS. The phone really does have 512mb RAM.

dirron86 said:
Because part of the RAM is reserved for OS. The phone really does have 512mb RAM.
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Yeah, and the graphic card need memory, too.

when i check task manager free ram is about 50 mb.but when i check in settings,application,running services,free ram is about 100 mb.why like this?

saleelsalam said:
when i check task manager free ram is about 50 mb.
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Calculate with me: 350-50=300
saleelsalam said:
but when i check in settings,application,running services,free ram is about 100 mb.why like this?
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Now 300-100=200, that's for your running services.