New experiment with PTDQ: dual playfield with both layers scrolling freely.

https://www.youtube.com/watch?v=mENnJygi5Eo

As usual, available from https://retream.itch.io/ptdq.

Fun fact: the foreground buffer is triple-buffered, but that's a complete waste as no graphics rendering is performed; the reason is the initial 5% was made months ago, but I got around to make the rest only now that my right arm is immobilized due to injury: it was just too much of a chore to write more code and to create more assets using just the left hand - and I'm not even left-handed (even just typing this is driving me nuts)!


LAYERS

Common:
* PTDQ system
* RGBWa color model
* 320x256 visible dots
* interleaved bitplanes
* horizontal and vertical scrolling

Background:
* 336x336 dots
* maximum 256 colors

Foreground:
* 672x576 dots
* maximum 81 non-transparent colors
* triple buffer


NOTES

* Both the layers reside in CHIP RAM.
* The layers use 6 bitplanes in all.
* If the foreground had not used 100% transparent dots, its maximum number of colors would have been 256.
* The triple buffer was implemented for glitchless rendering of graphics, but eventually no rendering was added.
* The 24-bit palettes for the cycling of the foreground colors are pre-calculated at startup; the effects are obtained by writing each frame a whole palette to the COLORxx registers with the CPU during the vertical blanking.
* The CPU is idle most of the time. The Copper is idle most of time unless the staggered lines are on. The Blitter is idle.
* YouTube's encoding degraded the quality.

Hey @Tumbleweed , I just used your instructions on a 2GB CF card in an A600 and they worked first time.
Here's the details for anyone else trying to replicate and might have issues.

DH0: OS3.1,  non-bootable, FFS, 100MB
DH1: OS3.2.3, bootable, FFS, 100MB
DH2 and DH3: non-bootable, PFS\03, 800MB each. I used Quick Format and the HDInstTools that came with 3.2.3.
Mostly Stock A600: Has a 3.2 ROM and 8MB of Fast.

Bootblock Rebels - The Hidden Stars of the Amiga Underground is now live on Kickstarter.

The project is a new book focused on the Amiga cracking scene and the wider underground - BBS culture, intros, scrolltexts, rivalries, friendships, and the people behind the aliases. The book is built around first-hand stories and original source material, rather than a dry A-Z history.

Check out the project page here:
https://www.kickstarter.com/projects/bitman/bootblock-rebels

AGS Includes Alladdin4D and OctaMED.

Hmmmmmm.......

I have an A500Mini running Aminimiga (based on Amiberry) which also comes with Pandory. I'd love to be able to use my XPen drawing tablet with programs like DPaint. i know that there's no Amiga drivers available but thought that the underlying Linux OS might be able to accept the driver. I'm not expecting pressure sensitivity or any other features, I just want to use a pen while drawing instead of a mouse. I'm also considering a pen/mouse as an alternate input device.

Any thoughts how to make this work? I've looked through the forums here but haven't found a definitive response.
I've placed the same question at the Amiberry forums but thought of asking here as well.

Thank you ahead of time for your thoughts on this.
Pierre