Available firmware dumps & updates[]
- EOS 50D fw 1.0.7 -- http://web.canon.jp/imaging/eosd/firm-e/eos50d/firmware.html
.fir file format[]
(50d00107.fir) ---updater1--- 0x000: modelId = 0x80000261, (50D, DryOS) 0x010: version = 1.0.7 0x020: cheksum = 0xb7a4b0e4 0x024: updater1 header start = 0xb0 0x028: updater1 payload start = 0x120 0x02c: updater2 start = 0xffffffff 0x030: firmware start = 0x19e020 0x034: 0xffffffff 0x038: file size = 0x914a3c 0x03c: 0x0 0x040: seed = 0x5f863728 0x044: 0x00000004 0x00000000 0x00000020 0x00000024 0x054: 0x00000044 0x000000b0 0x0019df70 0x0019e020 0x064: firmware length = 0x776a1c 0x068: hmac-sha1 = d741366f620128359e9982c64cf78d4efa9d7936 0x088: hmac-sha1 = 62b6238673a55b9469d1f11c3d93a55968d96801 0x09c - 0x0af: 0x0 ---updater1 header--- 0x0b0: updater1 payload length = 0x19df00 starts at 0x120 0x0b4: updater1 ??? = 0x19def4 0x0b8: 0x0 0x0bc: xor seed value = 0x3c660015 0x0c0 - 0x11f: 0x0 ---updater1 payload--- 0x120 - 0xfffffffe: (ciphered data) ---firmware--- 0x19e020: (+0x000), firmware header start = 0xc 0x19e024: (+0x004), firmware payload start = 0x7c 0x19e028: (+0x008), total firmware length = 0x776a1c. starts at 0x19e020 ---firmware header--- 0x19e02c: (+0x00c), firmware payload length = 0x7769a0 0x19e030: (+0x010), firmware ??? = 0x7769a0 0x19e034: (+0x014), 0x0 ---firmware payload--- 0x19e09c (+0x07c) - 0x914a3b: (encrypted data)
Magic Lantern support[]
Magic Lantern is now widely accepted as the replacement for CHDK on this camera The Magic Lantern firmware has recently added a unified firmware for the 550D,60D,500D,50D,and 600D (With upcoming support for the 1100D).