The Powershot A2500 was released on Jan 2013
CHDK is not available for the Powershot A2500 yet
Reviews and Specifications
The use of ver.req to determine your firmare version may not work. It is recommended you use the ACID utility to determine your firmware version.
- FW Start address: 0xFF810000
- DryOS v2.3, release #0052
#define LED_AF 0xC0223030 //Autofocus LED #define LED_PR 0xC0220094 //Green LED at the back
Download location for firmware dumps: