Canon CHDK User Manual page 47

A720IS
(Guide only, many variables to be considered)
Canon, 16MB (bundled)
A-DATA Speedy, 2GB (FAT16)
Kingston, 2GB Ultimate
Transcend, SD 4GB, Standard (FAT16 fresh format)
Transcend, SD 2GB, 80x
Transcend, microSD 2GB, Standard speed, MLC
ByteStor, SD 1GB, 50x
SanDisk, SD 1GB, Ultra II 60x
SanDisk, SD 2GB, Ultra II 60x (fresh format)
SanDisk, SDHC 4GB, Ultra II 60x (FAT16 fresh)
Sandisk, SD 2GB, Extreme III 133x (fresh format)
EMTEC, SD 2GB, 60x (FAT16 fresh)
• Create card with two partitions
This feature is used with SDHC cards larger than 4GB, on supported cameras (needs
multi partition support) it will create a small FAT16 partition with a size of 2MB for
CHDK and a larger partition formatted as FAT32 to store the images. On such a
prepared card the camera boots up CHDK from the small partition, then the partitions
are automatically swapped, this way the full capacity of the FAT32 partition can be used. The
partitions are not shown correctly under MS Windows, only one of the two partitions is shown, to
access the other partition without a special system driver, the partitions should be swapped with
"Swap partitions"
This option creates a 2 MB FAT partition on the SD card, that's fixed on the code for now. Copy
the CHDK firmware extensions to this partition and load them, (The DISKBOOT.BIN and
PS.FI2 files). Then select "Make card bootable" in "
not complain when you write-protect the card.
Next step is to select "
small partition and make the larger FAT32 one visible. We need to format it, and copy CHDK
files DISKBOOT.BIN and PS.F I 2 to it too, so we can perform "swap partitions" again. So
format it in FAT32, copy CHDK, insert it on the camera and load CHDK using "Firmware
Update", Select "Swap partitions" and "Make card bootable", write-protect the SD card, (lock
with slider on side of SD card) and power-cycle the camera. It should now load CHDK from the
small 2 MB partition, but have access to the larger FAT32 partition to store pictures, video and
the CHDK folders.
Memory Card Benchmarks Example
SD-card model, size
BEWARE: This can DELETE ALL data on the card !
" in "
Swap partitions
(See Notes section at end for late news)
Main Menu > Miscellaneous stuff
Main Menu > Miscellaneous stuff
Speed (Kb/s)
Write Write Write
(RAW) (Mem) (64k)
2254 1859 1754
2254 3164 2532
2254 10326 7692
2254 3980 3623
2254 7629 5505
2254 5358 5468
2254 8060 6132
2254 8840 5591
2254 9600 7123
2254 8718 5627
2254 10686 7594
2254 8073 7407
", this will hide this
45
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", so it does