Using graffity driver for Fusion on the Indivision AGA MK3

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    Sure that you are using the right driver? There used to be a project called "Graffity" that never saw the light of day, but was supported by some programs. It was planned to be a Zorro graphics card, and it was NOT an iComp product.


    Make sure that it's the "Graffiti" driver, with an "i" at the end, make sure to use PAL and set the X-offset for both text and graphics to a number that is a whole-number-multiple of 8.


    Jens

    I confirm, unfortunately, for now the drivers for Indivision do not work properly in either PAL or NTSC (both from the Fusion emulator).

    I never used Fusion myself - only Christian Bauer's Shapeshifter. Graffiti is known-good on PAL screens. Did you actually activate Graffiti emulation in the config tool? It does NOT work out of the box. You have to switch it on and save the setting.


    Jens

    Everything according to your recommendations and with PAL and with NTSC:

    Quote

    Graffiti requires the source screen to be centered at an X-Position that is divisable by 8.


    Dooma and Nemac in PAL work, while in NTSC the image is messed up.

    That means the Fusion driver has a problem, not Indivision. We do know that there's an issue with NTSC, but solving this has a low priority because you can use the PAL version. It's the same on Indivision's output side, so it does not have any drawbacks, but actually an advantage: More available pixels.


    So only Fusion remains - please talk to the developer of the driver. Or try out a different X-Setting (+2, +4 or +6 pixels).


    Jens

    Quote from Jens

    That means the Fusion driver has a problem, not Indivision. We do know that there's an issue with NTSC, but solving this has a low priority because you can use the PAL version. It's the same on Indivision's output side, so it does not have any drawbacks, but actually an advantage: More available pixels.


    So only Fusion remains - please talk to the developer of the driver. Or try out a different X-Setting (+2, +4 or +6 pixels).


    Jens

    The developer of Fusion Jim Drew is a crazy person, best bad idea in the world is talk to him.

    I did some tests (Indivision MK3 AGA) of the drivers on Shapeshifter - the ones included with the external Graffiti - here are the conclusions:

    -- at the original WB resolutions (PAL and NTSC) on Shapeshifter it gets an image similar to that on Fusion

    You can see the shift of the image, as in the case of Fusion


    -- If it uses the display mode from the HighGFX package to display WB, the image on the Shapeshifter emulator is even different



    -- screen in both cases is centered well, moving to a number not divisible by 8 results in such a message


    -- for that, with Graffiti030MMU and 040MMU driver, only the top bar of Mac OS is displayed :)



    With the arrival of Indi ECS v4, you could check how the Fusion and Shapeshifter emulators work, maybe you can improve something :).


    And before me still extended tests with Indi ECS v2 :).

    Not sure what this could be, as we have tons of positive reports about working Graffiti support on PAL screens. We're aware of a problem with NTSC, but if you have the same problem with a PAL screen, I have no idea what to try, as it's reported to work fine by many other customers.


    Jens

    But I also don't have a problem with PAL display in DoomAttack, Nemac IV or Trapped games.

    NTSC as you write is another matter.

    I'm talking about displaying the image correctly when using Mac emulators (using Graffiti drivers), taking advantage of the goodness of the Indivision :).

    Can't you set PAL or NTSC in those emulators? Try setting it to PAL, so the varying line length (which currently confuses the AGA MK3 Graffiti emulation) does not happen.


    Jens

    Both PAL and NTSC were tested.

    NTSC is a little worse ;-).

    For the time being, I'm focusing on PAL modes, as most software works fine on it.

    We are currently focussing on Indivision ECS V4, but some features and updates will be back-ported to Indivision AGA MK3. This includes improved Graffiti support, especially false Graffiti detection.


    Jens

    DoomAttack AIO, native graphics are 200 line. Running in Graffiti PAL leads to the extra unused 56 lines black border at the bottom of the screen.


    However the key difference is that the in NTSC mode the system is running faster, i.e. higher fps.


    Currently the trade-off is between non-Graffiti NTSC (higher fps) versus Graffiti PAL (better colour, black bar, slower fps).


    One could of course just play it on any modern PC, but that's not why we are here :)

    Quote

    Currently the trade-off is between non-Graffiti NTSC (higher fps) versus Graffiti PAL (better colour, black bar, slower fps).

    With this performance in Graffiti PAL mode is not so bad. I did some tests once there and they came out like this:

    -- CD32 TF330 50MHz Doom 1 -- (1710 gametics)



    -- CD32 TF360 Doom 2 -- (1205 gametics)


    To me, Doom in PAL 320x200 runs similarly to NTSC 320x200, and in Graffiti PAL 320x200 even slightly faster.

    The difference is in PAL 320x256, in performance and visible screen size (although I personally like the image in 320x200 better).