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Scanning the keyboard - questions

  • The Commodore 65 has some additional keys in comparison to 64. In the documentation I can see a keyboard matrix of 8 rows and 9 columns (as opposed to 8 columns on the C64). I've got two questions:

    1. How to read the extra column (the one with ALT, ESC, additional function keys, etc.)? Is it possible to do this from it's C64 mode?

    2. I would like to ask someone with Mega 65 board for a small favour: could you check (on the C65 ROMs in C65 mode) what are the PETSCII keys (if they are any) of the following keys:

    NO SCRL
    TAB
    ALT
    HELP
    ESC
    F9
    F10
    F11
    F12
    F13
    F14

    I know there are some C65 emulators, but I really don't trust they correctly map the keys (and - yes, I would like to support this keyboard in Open ROMs as a compile time option).