Search found 463 matches

by ob1
Wed Jan 04, 2023 8:20 am
Forum: Megadrive/Genesis
Topic: Programming Genesis in ASM?
Replies: 2
Views: 4686

Re: Programming Genesis in ASM?

Hello, and welcome to the scene.
I've written several thousands of lines of Genesis ASM.
I've always used snasm
You could find some useful links (and a great emulator too) here : http://techdocs.exodusemulator.com/Cons ... ment-tools
by ob1
Tue Dec 06, 2022 1:07 pm
Forum: Video Display Processor
Topic: Capabilities of various VDPs at parallax effects
Replies: 34
Views: 118544

Re: Capabilities of various VDPs at parallax effects

Thank you.
It is an actually much better way of posting this - still very interesting - piece of information.

Cheers,
Olivier
by ob1
Mon Jan 10, 2022 2:54 pm
Forum: Super 32X
Topic: Yet Another Tilemap and Super Scaler Demo
Replies: 20
Views: 21594

Re: Yet Another Tilemap and Super Scaler Demo

So many great new stuff!
It's nothing short of Amazing Vic.

I'm not sure the 32X had such a good year since ... 1994 ?!
by ob1
Tue Jan 04, 2022 8:17 pm
Forum: Super 32X
Topic: 32X VDP going crazy with my attempts to draw
Replies: 33
Views: 80536

Re: 32X VDP going crazy with my attempts to draw

True.
32X TECHNICAL BULLETIN #14 states :
In the 32X VDP, the shift bit becomes invalid when the lower byte of the base address set in the line table is $FF.
Therefore, make sure the lower byte in the table is not $FF when using shift
by ob1
Tue Jan 04, 2022 7:53 pm
Forum: Super 32X
Topic: DREQ_FIFO Register
Replies: 0
Views: 64633

DREQ_FIFO Register

Hello to all.
I've tried to play with the DREQ_FIFO Register.
On real hardware,
It IS write only on the Genny side,
if 68S is not set, then the 32X cannot see it. The read value is always 0.
Thought that could help.
by ob1
Mon Jan 03, 2022 6:05 pm
Forum: Super 32X
Topic: Untitled 32X Super Scalar Project
Replies: 34
Views: 34442

Re: Untitled 32X Super Scalar Project

Chilly Willy wrote:
Sun Jan 02, 2022 3:39 pm
I always make my example code MIT so that it can help as many people as possible.
Slow clap

Thank you Sir!!
by ob1
Mon Jan 03, 2022 10:50 am
Forum: Super 32X
Topic: 32X VDP going crazy with my attempts to draw
Replies: 33
Views: 80536

Re: 32X VDP going crazy with my attempts to draw

Take a look at my research posts about drawing sprites. There are routines that draws 32x32 sprites in various ways. It may give you some ideas. But realistically chances are you’ll have to settle for a low framerate or draw just the important objects. The 32x doesn’t give you enough pixel throughp...
by ob1
Mon Jan 03, 2022 10:49 am
Forum: Super 32X
Topic: 32X VDP going crazy with my attempts to draw
Replies: 33
Views: 80536

Re: 32X VDP going crazy with my attempts to draw

Once upon a time, Phil Lewin made an amazing Job with the unreleased Pinocchio : https://hiddenpalace.org/Pinocchio_32x_ ... prototype)
by ob1
Wed Dec 29, 2021 9:44 pm
Forum: Super 32X
Topic: 32X VDP going crazy with my attempts to draw
Replies: 33
Views: 80536

Re: 32X VDP going crazy with my attempts to draw

The 32x really has a lot to offer, 2D-wise.
Keep on the hard work ;)
by ob1
Mon Dec 13, 2021 10:15 am
Forum: Megadrive/Genesis
Topic: EXG instruction encoding
Replies: 4
Views: 7357

Re: EXG instruction encoding

... or macro 'em.
I think I remember some assemblers had some problems with MOVEP.
But we're talking 15+ years of memories :D
by ob1
Wed Dec 08, 2021 7:38 am
Forum: Super 32X
Topic: 32x "security code" reverse engineered
Replies: 27
Views: 44523

Re: 32x "security code" reverse engineered

So,I've done my homework, and indeed, I can write at 0x70!! Tested on Fusion and real (PAL) hardware. Unfortunately, it looks like it doesn't work on Gens. I can write 0x70, the KMod debug window tells me it has been modified, but when H_INT happens, it looks like it goes to 8802A2 no matter what. g...
by ob1
Fri Jun 25, 2021 11:01 pm
Forum: Super 32X
Topic: Experimenting with 32x sprite drawing and scaling techniques
Replies: 1
Views: 6937

Re: Experimenting with 32x sprite drawing and scaling techniques

Multiple scaled 32x32 sprites ~150 sprites
These results are just insanely great.
I’ve been working on 32x 2D for a long time, and what you’ve achieved totally blows my mind!
Congratulations to you.
by ob1
Fri Jun 04, 2021 11:45 am
Forum: Megadrive/Genesis
Topic: Releasing on Steam (and similar platforms)
Replies: 10
Views: 12141

Re: Releasing on Steam (and similar platforms)

By the way, regarding editors, you definitely should get in touch with segatim
The guy just issued two brand-new games in cartridges. See the demo subforum here viewforum.php?f=8
by ob1
Fri Jun 04, 2021 11:42 am
Forum: Demos
Topic: Release "Space flies attack" for Sega Genesis / MD
Replies: 11
Views: 15470

Re: InDev Space flies attack for Sega Genesis / MD

Wow that’s two brand-new games in less than one week? What a great time to follow Sega Genesis scene.
Congratulations to you!!
by ob1
Thu Jun 03, 2021 8:25 pm
Forum: Demos
Topic: Release Mega Marble World 2 for Sega MD / Genesis
Replies: 13
Views: 23199

Re: WIP Mega Marble World 2 for Sega MD / Genesis

Great achievement. Congratulations!!