EDC/ECC checker for RAW (2352 bytes/sector) CD images

Copyright © 2013-2020 Natalia Portillo [email protected]

Based on ECM v1.03 Copyright © 2002-2011 Neill Corlett

edccchk

RAW 2352 bytes/sector image of a CD.

• Checks EDC and ECC fields consistency of CD sectors.
• Supports Mode 0, Mode 1 and Mode 2 data sectors, ignores Audio sectors.
• Shows failing sectors as MSF.

2013/12/08 v1.00

• Converted ECM code to only check sectors.
• Added support for mode 0 sectors.

2014/03/02 v1.10

• Corrected handling of mode 2 form 2 sectors with omitted EDC. Side-effect, corrects mode 2 form-less sectors processing.

2014/03/02 v1.11

• Corrected sum of total errors.

2014/03/06 v1.20

• When an error is detected, will tell if the error was detected with ECC P, ECC Q or EDC. Useful to detect EDC/ECC field corruption.
• Shows a warning when mode 2 subheader copies differ. Other tools detect this as an error, but if both ECC and EDC are ok it's intentional.
• Shows summary of total warnings and total errors+warnings.

2014/03/15 v1.25

• Corrected mishandling of end of data. It was checking for a sector on what should be uninitialized memory instead of breaking main loop.

2014/03/16 v1.26

• Corrected counting 1 sector more than real.

2020/05/03 v1.27

• Detect sectors where user data has been filled with 0x55.

• Support RAW+SUB images (2448 bytes/sector)
• Check Q-subchannel CRCs
• Check CD+G CRCs
• Check consistency of P and Q subchannels with sector headers