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PowerShot A720 IS[]

Notice.png

CHDK is available for the A720IS with firmware version 1.00C from the Download page


Powershot A720 IS Front

Powershot A720 IS Back

Reviews and Specifications[]

Technical Data[]

Release date:August 2007
Sensor CCD size:8.0 MP 1/2.5"
Lens (35mm equiv) zoom35-210, 6x
LCD size2.5" fixed
CardSD / SDHC / MMC
Size (mm)96.5 x 66.0 x 43.2
Weight (body)200 g

Firmware Information[]

Firmware information is given if a file named ver.req exists on the SD.

  • (vers.req reveals Total Shots instead of IS Version)

In PLAY mode (with ver.req)

First hold FUNCSET and press DISP :
Canon PowerShot A720 IS
P-ID:315D  PAL D

Firmware Ver GM1.00C
E18
Jul  5 2007 11:32:58
Second press of DISP (while still holding FUNCSET) reveals:
Adj Ver.012.006
ZoomLensError
2007.10.22 00:41:26
Third press of DISP (while still holding FUNCSET) reveals:
Adj Ver.012.006
IS Firm Ver.  3.00
IS Param Ver.  3.11


Other Firmware information is given if a file named vers.req exists on the SD.

In PLAY mode (with ver.req)

First hold FUNCSET and press DISP :
Canon PowerShot A720 IS
P-ID:315D  PAL D

Firmware Ver GM1.00C
E18
Jul  5 2007 11:32:58
Second press of DISP (while still holding FUNCSET) reveals:
Adj Ver.012.006
ZoomLensError
2007.10.22 00:41:26


Third press of DISP (while still holding FUNCSET) reveals:
Adj Ver.012.006
Total Shoot :
Open Shoot :
Closed Shoot :


CHDK specialities[]

  • Since CHDK changeset #919 the <Alt> button can be set to PRINT (default) or DISPLAY from the "Miscellaneous stuff" / "<ALT> mode button" CHDK menu
    • If DISPLAY is selected for <Alt> button: press DISPLAY quickly it will act as your <ALT> mode button, but if you hold it down for a second, it acts like the DISPLAY button normally does

For Developers[]

Inside this decent camera, the OS is the new DryOS, see also DryOS Porting.

Firmware dumps[]

  • FW 1.00C (blinked out in 2007)
Saveas64.png

Download location for firmware dumps:
P&S firmware dumps mirror

LED memory addresses[]

 #define AF 0xC02200c0    // AF-Beam (red)
 #define DP 0xC02200c4    // direct-print (blue)
 #define OR 0xC02200c8    // orange state-led (bi-state with green)
 #define GR 0xC02200cc    // green state-led (bi-state with orange)
 #define YE 0xC02200d0    // Yellow state-led
 #define PW 0xC02200d4    // Power (green)

Porting status (outdated)[]

→ porting the A720 is completed.

Canon switched the OS from VxWorks (used on earlier cams) to their own DRYOS with the A720. That means that a lot of reverse engineering was done to find out how to hook an extension like CHDK into the A720. See dpreview-posting and Canon page on DRYOS

Most of the porting work is nearly done now!

A complete port is finished. (A long time ago) Only few features are missing,? such as

  • usb-support for remote shooting - works now.
  • long filename support in filemanager

You need to:

The dcraw beginning with version 8.82 supports RAW format for A720 IS.

Edited 21/05/09

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