The Powershot ELPH 330 HS (IXUS 255 HS in Europe) was released on Jan 2013
CHDK is available for the PowerShot ELPH330HS / IXUS 255 with firmware 1.00F or 1.00H as BETA version from the Download page.
Reviews and Specifications
The use of ver.req to determine your firmware version does not work. It is recommended you use the ACID utility to determine your firmware version.
#define GREEN_LED 0xC022C020 #define AF_LED 0xC022C028
Download location for firmware dumps: