Search found 158 matches

by greatkreator
Sat Jan 08, 2022 1:37 pm
Forum: Megadrive/Genesis
Topic: HBlank wrong hardware behaviour
Replies: 1
Views: 3085

Re: HBlank wrong hardware behaviour

First of all: emulators is a bad idea for testing such things. Trust just the real (original) hardware. Some of them still have problems with some features like horizontal interrupt. As far I know currently the most accurate emulator is BlastEm. Also to some extent Exodus is useful. Second: usually ...
by greatkreator
Tue Jan 04, 2022 11:53 am
Forum: Megadrive/Genesis
Topic: Horizontal Interruption Mystery
Replies: 2
Views: 5300

Re: Horizontal Interruption Mystery

Thanks for the interesting information!
by greatkreator
Mon Jan 03, 2022 6:24 pm
Forum: Megadrive/Genesis
Topic: Horizontal Interruption Mystery
Replies: 2
Views: 5300

Horizontal Interruption Mystery

After trying to dig a bit deeper into VDP's horizontal interruption I found an interesting thing: when you enable horizontal interruption in the reg #0 one interrupt is fired immediately after that and another interrupt happens as expected with the delay set in the reg #10. Does anyone have any idea...
by greatkreator
Mon Mar 22, 2021 9:57 am
Forum: Demos
Topic: Direct Color Demo using DMA
Replies: 91
Views: 114563

Re: Direct Color Demo using DMA

The time runs so fast. Just 15-17 years passed since then.
by greatkreator
Thu Dec 12, 2019 4:45 am
Forum: Demos
Topic: Mode 7 demo for Genesis/MD
Replies: 63
Views: 186379

Re: Mode 7 demo for Genesis/MD

Nice!

The "pixels" of the background are 2x2?
by greatkreator
Sun Dec 31, 2017 3:38 pm
Forum: Announcement
Topic: Future of SpritesMind
Replies: 38
Views: 47809

Re: Future of SpritesMind

Chilly Willy you are still with us!
And you are right as always.
by greatkreator
Sun Dec 24, 2017 11:14 pm
Forum: Megadrive/Genesis
Topic: DMA transfer to CRAM visible however the screen is off.
Replies: 28
Views: 23902

Re: DMA transfer to CRAM visible however the screen is off.

Actually I did intend to display an "almost" direct color image. And it's almost successful. It's possible to reload 48 colors per screen line thus you have 12 dynamic + 4 static colors per palette. But it doesn't help too much as long as you can't overlap those colors. Each 16 colors are bounded by...
by greatkreator
Sun Dec 24, 2017 10:48 pm
Forum: Megadrive/Genesis
Topic: DMA transfer to CRAM visible however the screen is off.
Replies: 28
Views: 23902

Re: DMA transfer to CRAM visible however the screen is off.

I guess I confused something and didn't understand you right.
by greatkreator
Sun Dec 24, 2017 10:06 pm
Forum: Megadrive/Genesis
Topic: DMA transfer to CRAM visible however the screen is off.
Replies: 28
Views: 23902

Re: DMA transfer to CRAM visible however the screen is off.

A VDP palette has 16 colors.
You can't use 56+8 colors.

If you make a heap of layers than you should transfer a lot of image index data for each layer.
VDP barely can transfer them for one single layer.
by greatkreator
Sun Dec 24, 2017 9:14 pm
Forum: Announcement
Topic: Bill paid
Replies: 16
Views: 24379

Re: Bill paid

how to pay for this forum?
by greatkreator
Mon Dec 18, 2017 6:39 pm
Forum: Announcement
Topic: Future of SpritesMind
Replies: 38
Views: 47809

Re: Future of SpritesMind

And what's the result?
To be or not to be?
by greatkreator
Thu Oct 12, 2017 9:07 am
Forum: Megadrive/Genesis
Topic: DMA transfer to CRAM visible however the screen is off.
Replies: 28
Views: 23902

Re: DMA transfer to CRAM visible however the screen is off.

Even he shows such zoomed images I can see clearly those damned columns. The most important to know is that it's possible to sync. But it doesn't help too much. Personally for me those wide columns destroy everything. I could ignore 2x1 sized pixels. But I can't ignore those wide columns. They just ...
by greatkreator
Thu Oct 12, 2017 8:16 am
Forum: Megadrive/Genesis
Topic: DMA transfer to CRAM visible however the screen is off.
Replies: 28
Views: 23902

Re: DMA transfer to CRAM visible however the screen is off.

An interesting feeling to know now how it's easy to sync VDP...
It's really strange they couldn't do that in 1993.
No magic. Just overload VDP and make a fine pause after that.
by greatkreator
Tue Feb 14, 2017 6:24 pm
Forum: Megadrive/Genesis
Topic: Please help decide on projection
Replies: 12
Views: 9536

Re: Please help decide on projection

The most interesting that human perception almost doesn't notice that feature. At least in the times when SC1 was very popular I personally had never noticed that. I felt a bit that something was wrong and strange but that's was a very slight feeling. The left fake-projection causes to me much more ...
by greatkreator
Tue Feb 14, 2017 5:48 pm
Forum: Megadrive/Genesis
Topic: Please help decide on projection
Replies: 12
Views: 9536

Re: Please help decide on projection

StarCraft 1 uses isometric visualization and "plain" 2D physics. For example if you command two the same units to go horizontally and vertically they will do that with the same speed. If the physics would be really isometric vertical moves would be twice slower for example as in another less popular...