Utilities to make FAT16, FAT32 and exFAT CF cards bootable

zeno

Thanks to a couple of testers, I've found the (very stupid) mistake in MacBoot that was preventing it making cards bootable for Magic Lantern. I'd completely forgotten to write the BOOTDISK string on FAT32 cards (and only wrote it on FAT16 cards if the "make CHDK-bootable" option was selected). Version 1.02 fixes this - see http://www.zenoshrdlu.com/macboot/macboot.html

(apologies for bad link earlier = thanks Pelican)

I am hoping to do something about exFAT soon (but don't hold your breath!)

Pelican

zeno
- see file:///Users/dave/Java/MacBoot/MacBoot.html

It seems like a local file...
http://www.zenoshrdlu.com/zips/macboot.zip

Will you implement the exFAT also?

arm.indiana

Here is a -working- and -open source- solution:

http://magiclantern.wikia.com/wiki/Bootdisk

http://groups.google.com/group/ml-devel/browse_thread/thread/1161d4e6e93232de

Arm.Indy

zeno

@arm.indiana

nicely done, though I think the comment "# write VBR checksum (from sector 0 to sector 11) at offset 5632 (sector 12) and sector 24 (sector 24, for backup VBR)" near the end of the bash script is wrong. You are actually computing the checksum of sectors 0 to 10 and writing it in sector 11 (which is the right thing to do according to the wiki at http://magiclantern.wikia.com/wiki/EXFAT_rerated_stuf)

zeno

Thanks to Pelican and arm.indiana I've modified MacBoot to deal with ExFAT cards. Testing shows the strings are written in all the right places and the sector checksum properly recomputed and written back (twice). I'd appreciate a Mac user of Magic Lantern testing it - see http://www.zenoshrdlu.com/macboot/macboot.html

whim

Thanks guys,

updated thread title & first post comments to reflect the changes

wim

zeno

Turns out that the code I added to deal with ExFAT cards (which worked) had the side effect of screwing things up for FA16/FAT32 (which worked before). Version 1.05, now on the website, should work properly for all cards!

Thanks to Yannick Hagmann for reporting the latest problem.

Pelican

A new version of EOScard is available.

gravegrave

hi

i am use the Canon PowerShort s90 and toshiba SDHC 8G class Memory Card
The card can't format to FAT or FAT16...what step i have to follow to make the card bootable to auto load CHDK... ...

Thanks All of you> <

whim

@gravegrave

Cards > 4 GB can not be directly made CHDK bootable - they need to be partitioned.

Skywalker9 wrote a nice tutorial, which is linked here

hope that helps,

wim

PS Note that this thread is in "DSLR CHDK Development" which is confusingly named - what runs on
DSLR's is NOT CHDK ! THe DSLR hacks (unlike CHDK) CAN boot from FAT32 cards.

nahuel_89p

Ok, I really appreciate your development, but just to make it clear:

I have a Canon 350D with firmware 1.0.3 (as suggested) and an 8GB CF card. To make it bootable, and in a safe way, is it enough just with using the Card Tricks V 1.45?? I read somewhere i need a partition, but im not sure if that is what Card tricks actually does.
I just want my 350D with the CHDK tweaks. Particularly Timelapse.

Just to clarify: My CF card is currently formated by the camera.

nahuel_89p

Update: I did it that way. I got an spooky "err 99" after i used it for a while the 1st time, but now it works ok.

Any clue on the "99 err"?

iDentist

I just bought 400d chosen mainly because of this hack.

But I can't make it work. Followed the instructions from here but when I put the CF in the slot in the final step, the blue button doesn't light. Instead, the camera turns on, but the display is not working. I can focus but not take pictures. Also, cannot turn off the Camera.

Win 7 x64, CF 4GB (3.8GB)

What am I doing wrong?

zeno

Cameras released in 2011 allow CHDK to autoboot on a FAT32 card. I'd like to modify my OSX SDMInst app so that it can do create such cards - currently Mac OSX users who want to create bootable single partition cards > 4GB (e.g. for an A3300) are out of luck.

My question is this - where does the 'BOOTDISK' string have to be written on a FAT32 card? Is it still at x'40'?

PS - PhilMoz provides the answer (0x1e0) here - https://chdk.setepontos.com/d/6645

hiker_jon

Hi,
I searched for this, but found nothing. Cardtricks (145) is intolerably slow when formatting a 4gb card on my Windows 7 laptop. I need to use the windows format tool which is very fast and can do fat.

Jon

hiker_jon

EOScard 1.1 writes the "BOOTABLE" string to 0x5C for a FAT32 card. Anyway to change this to 0x1E0?
See below
https://chdk.setepontos.com/d/6645

Pelican

hiker_jon
EOScard 1.1 writes the "BOOTABLE" string to 0x5C for a FAT32 card. Anyway to change this to 0x1E0?
See below
https://chdk.setepontos.com/d/6645

Yes. Use EOScard 1.2

geoffff

OK, I've tried everything here, but I just can't seem to make my 64GB exFAT card bootable -- and boot CHDK on my SX230HS camera. I've tried everything, but I still get no CHDK (camera just says card is write protected) when I boot from my 64GB exFAT card.

Can anyone help me get my SX230HS camera to boot CHDK from my 64GB exFAT card?

Notes:

Camera is SX230HS, firmware 1.01A
Card is "Komputer Bay" 64GB SDXC card, formatted as exFAT
Booting CHDK works great with another card of mine - an old 16 FAT32 card
Running CHDK works great using the "firmware update" method - with all my cards
I've tried making my 64GB exFAT card bootable using CHDK's "Make Card Bootable" menu
I've tried making my 64GB exFAT card bootable using EOScard.exe version 1.2

Thanks for any advice!
-- Geoff

reyalp

geoffff
OK, I've tried everything here, but I just can't seem to make my 64GB exFAT card bootable -- and boot CHDK on my SX230HS camera.

AFAIK P&S cameras do not boot from exFAT. Only FAT16 (all cameras) and FAT32 (DRYOS R47 and later cameras, which is everything released from 2011 on)

You should be aware that this thread is in the DSLR sub-forum, so things described here may not be applicable to P&S. It's up to you to read the thread and understand which parts may be applicable to your camera.

geoffff

reyalp
AFAIK P&S cameras do not boot from exFAT. Only FAT16 (all cameras) and FAT32 (DRYOS R47 and later cameras, which is everything released from 2011 on)

Thanks. Sad, but good to know.

reyalp
You should be aware that this thread is in the DSLR sub-forum, so things described here may not be applicable to P&S. It's up to you to read the thread and understand which parts my be applicable to your camera.

No, I didn't notice! Got here via Search. I'll keep that in mind, and ask elsewhere.

-- Geoff

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