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-   -   Boot from 2gb Card (https://talk.maemo.org/showthread.php?t=7007)

fanoush 2007-07-11 11:06

Re: Boot from 2gb Card
 
Quote:

Originally Posted by Milhouse (Post 58953)
MMC Mobile has 4 data pins compared to the single data pin in regular RS-MMC cards.

Yes, thats how you recognize it, card has two rows of pins (13 in total, and in fact 8 data pins, not 4). Plain (RS-)MMC has 7 pins in total.

But those extra data pins are not used at all in N770 (at least in the one I have). What matters in N770 is maximum frequency card can do which is 20Mhz for rs-mmc but 26 or 52MHz for mmcmobile. Due to omap chip limitation this translates to 16 vs 24 vs 48 MHz used. You only see the speedup with hacked kernel, though.

The kingston 2gb mmcmobile was a good choice for me. It can run at 48Mhz just fine in my device. Some people reported mmcmobile cards that support only 26Mhz mode, not 52. When I bought it even the price was OK (i.e cheapest from all rsmmc/mmcmobile). Currently it is for approx. 30EUR here including VAT, not sure how cheap other 2gb rs-mmc/mmcmobile cards are.

mrp 2007-07-11 12:08

Re: Boot from 2gb Card
 
Quote:

Originally Posted by fanoush (Post 58978)
The kingston 2gb mmcmobile was a good choice for me. It can run at 48Mhz just fine in my device.

How can I check the actual frequency in 770?

ikonosin 2007-07-11 12:33

Re: Boot from 2gb Card
 
Quote:

Originally Posted by Milhouse (Post 58953)
For future reference, MMC Mobile (sometimes also called MMC Plus)

Can you get MMC Plus is the correct form factor? All the MMC Plus I've seen is NOT the reduced size of RS-MMC & MMC Mobile.

Milhouse 2007-07-11 15:46

Re: Boot from 2gb Card
 
Quote:

Originally Posted by fanoush (Post 58978)
Yes, thats how you recognize it, card has two rows of pins (13 in total, and in fact 8 data pins, not 4). Plain (RS-)MMC has 7 pins in total.

But those extra data pins are not used at all in N770 (at least in the one I have). What matters in N770 is maximum frequency card can do which is 20Mhz for rs-mmc but 26 or 52MHz for mmcmobile. Due to omap chip limitation this translates to 16 vs 24 vs 48 MHz used. You only see the speedup with hacked kernel, though.

The kingston 2gb mmcmobile was a good choice for me. It can run at 48Mhz just fine in my device. Some people reported mmcmobile cards that support only 26Mhz mode, not 52. When I bought it even the price was OK (i.e cheapest from all rsmmc/mmcmobile). Currently it is for approx. 30EUR here including VAT, not sure how cheap other 2gb rs-mmc/mmcmobile cards are.

Ah sorry, my bad - I thought the MMC updates in more recent firmware supported the wider data buses available in MMCmobile.

I guess MMCmobile is only worthwhile if the price differencial with regular RS-MMC is quite narrow.

Milhouse 2007-07-11 15:47

Re: Boot from 2gb Card
 
Quote:

Originally Posted by ikonosin (Post 59003)
Can you get MMC Plus is the correct form factor? All the MMC Plus I've seen is NOT the reduced size of RS-MMC & MMC Mobile.

According to the MMC wiki, MMCplus is a synonym for MMCmobile although it's possible (likely?) that MMCmobile is being used for the reduced size form factor and MMCplus for the full-size equivalent.

fanoush 2007-07-11 16:00

Re: Boot from 2gb Card
 
Quote:

Originally Posted by Milhouse (Post 59057)
Ah sorry, my bad - I thought the MMC updates in more recent firmware supported the wider data buses available in MMCmobile.

Yes for N800, no for N770 since the connector in N770 don't have 9 pins but only six. Well, at least in my device.

bigred66 2007-07-13 13:48

Re: Boot from 2gb Card
 
Having troubles at the boot menu. Im presented with
1. Internal flash
2. MMC card
3. MMC card, partition 2, ext2
4. USB hard drive
5. Power off (when not on charger)

Which option do i want to choose?
I choose #2 MMC card, but i noticed no size increase when i went 'Memory' in the control panel. I can see the the space on the Card is now 1.37GB. I should have about 500MB, but it still only reads 60MB.
Any suggestions/tips?

ishtob 2007-07-17 17:11

Re: Boot from 2gb Card
 
Quote:

Originally Posted by bigred66 (Post 59659)
Having troubles at the boot menu. Im presented with
1. Internal flash
2. MMC card
3. MMC card, partition 2, ext2
4. USB hard drive
5. Power off (when not on charger)

Which option do i want to choose?
I choose #2 MMC card, but i noticed no size increase when i went 'Memory' in the control panel. I can see the the space on the Card is now 1.37GB. I should have about 500MB, but it still only reads 60MB.
Any suggestions/tips?

choose "MMC card, partition 2, ext2", option #2 (the "MMC") will try to boot your device from partition 1, which is the 1.37GB part with no OS installed, so it will automatically boot from flash instead

ZAP 2007-09-02 14:09

Re: Boot from 2gb Card
 
I just finished doing this, and I had some confusion at the boot menu also. The boot menu options seem to be incorrectly displayed, because if I choose #3 I get the "Can't boot from MMC...booting from Flash" error, whereas #2 does boot my OS2007HE N770. I followed the instructions here and in the easy guide, and other than the slightly confusing menu it seems to have worked fine.

@bigred66: I don't think you should see any more memory in the Control Panel. As I understand it, the 770 has two chunks of flash memory: 64 MB for RAM-like use, and 64 MB for hard drive-like internal storage. What you've done is to increase the internal storage chunk (and also put it on a faster chip). So reading system and other files from that chunk should be a lot faster, and you aren't limited to installing only 64 MB total of applications and whatnot.

I am understanding this correctly, right folks?

ZAP 2007-09-02 15:33

Re: Boot from 2gb Card
 
Hmm... Perhaps everything didn't work as expected... If I boot from Flash I see all of the new programs that I just installed while booted from MMC (option #2), and when I insert my memory card in my Ubuntu PC it can't read the ext partition (just the big FAT one).

...and it doesn't seem any faster to me...

So perhaps something got messed up in copying the system to the MMC partition?


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