Found on battery grip in 50D
Can use this connection to gain access to EvShell
With this access, you can communicate with DryOS
Found on 50D, 5D3, 700D and many others
EvShell is the "main" shell on ICU on DSLRs. You can access DryOS Shell using 'drysh' command from EvShell.
See https://www.magiclantern.fm/forum/index.php?topic=25662.0 for the general idea, but please note that linked thread is for Digic 8 so not everything will be applicable.
On MPU there's a separate shell like that:
https://www.magiclantern.fm/forum/index.php?topic=25661.0
Easy to distinguish due to different prompts :)
Numbers From screen side 1 to SD card side 6.
Canon 70D
Screen 1 | 2 | 3 | 4 | 5 | 6| SD card.
Pin 1 - ICU TX (must be connected to usb uart RX)
Pin 2 - ICU RX (must be connected to usb uart TX)
Pin 3 - GND. Connected directly (0 Om) to tripod mount and hot shoe base.
Pin 4 - Power (+). Camera off 3.1v, camera on 3.3v
Pin 5 - MPU TX (must be connected to usb uart RX)
Pin 6 - MPU RX (must be connected to usb uart TX)
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