Since today you can read the Amiga Future issue 151 online on our webpage.

In irregular intervals we provide older issues of the Amiga Future for free online.

The PDF versions (in HQ) are available in our online shop

Read the german mags online: https://www.amigafuture.de/app.php/kb/index?c=10
Read the english mags online: https://www.amigafuture.de/app.php/kb/index?c=65

https://www.amigafuture.de
https://www.amigashop.org
http://www.apc-tcp.de

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 layer is triple-buffered, but that's a complete waste as no graphics rendering is performed; the reason is that 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.......