Indivision ECS V4 Graffiti not really working

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    Hello,


    i have an indivision ecs v4 in my amiga 500 with full ecs support. i installed the graffiti disk v1.4 and run the demos. but they doesn't work. only a black/dark grey screen on the left side of the monitor. the only program that can draw an image was the viewer on this disk.

    it shows the image but only on the left side and its more like 256x256 (512x256) than 320x256 (640x256).

    i also tried to make a small assembly program. but i get also only the grey screen.


    https://red-eclipse.com:8080/Build/photo_2025-01-08_11-46-49.jpg


    best regards,

    peabrain/haujobb

    I haven't looked at the Graffiti disk in >20 years. If I remember right, most of the demos are AGA-only, as they require SHires with 4 bit planes.


    So the viewer is the thing that you can use, and it should indeed show 320x256. I remember there was a cat picture on the disk - just to exclude that the file you're trying triggers a bug in te viewer.


    Also, please make sure to use the latest core available for Indivision ECS V4 (see Wiki). Peter did a lot of work on the output stage.


    Jens

    HEllo,


    thank you for the fast answer. the cat picture has the same problem. i think i updated the core lately. is it possible to check which version is installed?


    best regards

    That's the latest - we'll have to look into that, but what you can do to cross-check is to run the config tool and re-flash the firmware from the droop-down menu (not from a file) - this will roll you back to the previous version (without framebuffer support), as the config tool itself has the previously-known-stable core in it's binary. Please report back if this changes Graffiti behaviour.


    Jens

    i downgraded to 20241104. but the issue is the same.

    sadly. i would likely see the copperlist from the viewer application.

    the viewer runs in 640x256, hires. so it seems to be working. but not with my copperlist.

    i did it like discribed in https://wiki.icomp.de/wiki/Graffiti

    sorry for my bad english.


    best regards.

    ok, i found it out. i qoute from another thead was "Graffiti requires the source screen to be centered at an X-Position that is divisable by 8."

    that was the point. but it was not mentioned in the graffiti wiki.

    nice. but it is only the solution for enabling the graffiti in ecs. this doesnt solve the problem with the screen shifting.

    best regards

    so, i did now some pictures and i also want to provide my sourcecode for my little example. its compatible with asm-one ans vasm.

    the picture shown the test without graffiti and with graffiti. the program starts without graffiti and when you press a button, the graffiti mode will be enabled. and you can see, thats something isnt right. maybe with ddfstart and ddfstop, my copperlist doesnt change.

    i hope, i have noch mistake in my code.

    but please take a look at it.


    https://red-eclipse.com:8080/Build/graffiti_test.zip


    best regards

    Hello again,


    now i made a simple comparison (program) of all 4 systems, the amiga 1200 (aga), the amiga 500 (ecs), winuae with amiga 1200 settings (aga) und winuae with amiga 500 setting (ecs).

    in both winuae settings and the amiga 1200, the whole image is visible. but on the amiga 500, its partially missing on the right side.

    on all systems graffiti is detected from winuae or indivision.


    best regards

    Colours seems to be off as well. While the OSD shows the expected colours, the picture itself appears like it can't display the correct gray for the cage-like tubes. Is this a simple test program that you can attach here, or is this a game/WIP?


    I guess you're setting the colour palette at the top of the screen, as recommended in my documentation. What you could try is to shorten these lines to what's visible - if that fixes the colours, we have one more indication where to look for the problem.


    Jens

    Also, can you export your ECS V4 configuration, so we can exactly replicate that?


    The OSD is shifted to the left in your picture. Is that always shifted to the left with a non-lace PAL screen, or does that left-shift only happen when a Graffiti mode is being displayed?


    Jens

    Quote from Jens

    Colours seems to be off as well. While the OSD shows the expected colours, the picture itself appears like it can't display the correct gray for the cage-like tubes. Is this a simple test program that you can attach here, or is this a game/WIP?


    I guess you're setting the colour palette at the top of the screen, as recommended in my documentation. What you could try is to shorten these lines to what's visible - if that fixes the colours, we have one more indication where to look for the problem.


    Jens

    hello,


    the problem with the colors on the a500 is not such a big problem. could be the monitor. but the image-cut on the right site is bad.

    Pinball.zip

    i hope the example-program helps a little bit.


    best regards

    Indivisino ECS V4 will be on the agenda later this month. For now, ACA1240/1260 has priority.


    Jens

    We are on Indivision ECS V4, but not on Graffiti mode - the blitter currently has priority.


    Jens