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  • C64 Lightpen support

    From Daniel England@3:770/3 to All on Thu Jun 21 11:40:09 2018
    Heyas!

    I'm wondering if I can get some helpful advice...

    I'm currently writing a game for the C64 that has a fairly complicated menu system with up to about ten options on it and I'm currently supporting keyboard
    and mouse input.

    I want to run the game in VICE on Android so I can play the game on the go.
    However, the mouse support seems to require a real mouse and that would be a little awkward.

    I could support joystick navigation but I think that would be a little cumbersome unless I program the menu slightly differently.

    So, I think I want to support the lightpen. I want to be able to tap the screen and navigate the menu options (or set the pointer position).

    Firstly, does anyone know how if this is how it works on VICE for Android?

    Secondly, can anyone tell me how to program the support? I'm writing the game in assembly, of course but a BASIC example would suffice.

    I don't quite understand the difference between the triggers and the position and how the IRQ and latching works on the VIC-II. I understand that on a real C64 there are some caveats. Do these apply to VICE?

    TIA!


    Daniel.

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  • From Daniel England@3:770/3 to All on Thu Jun 21 16:41:59 2018
    Meh...

    I found that cc65 has an example driver for the InkWell LightPen. I used it to
    implement a small test program which works very well with VICE on Windows but seems to not work on Android like I want. Darn!

    Oh well... I might have to hack at VICE. Not something I'd enjoy. I'm sure compiling it for Android would be a pain.


    Daniel.

    --- SoupGate-Win32 v1.05
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