Search found 2534 matches

by Chilly Willy
Fri Apr 13, 2018 11:17 pm
Forum: Hardware
Topic: Some questions about Saturn HW
Replies: 1
Views: 73

Re: Some questions about Saturn HW

Hi all! I'm learning about how Sega Saturn works, just for fun, some questions I didn't found the answer. Hope you can help me! :wink: - Main RAM: I read 2MB in some places, but also 1.5MB in others (labelled as "work RAM"). Why? - Main RAM: I read 2x1MB in total, 2 different RAM chips (slow+fast)....
by Chilly Willy
Thu Mar 22, 2018 1:23 pm
Forum: Megadrive/Genesis
Topic: M68K and Genesis VDP cheat sheets now available
Replies: 4
Views: 367

Re: M68K and Genesis VDP cheat sheets now available

Those PDFs are slick! Thanks for making those, even if some of us probably don't need them. They make a nice reference tool.
by Chilly Willy
Fri Mar 16, 2018 1:46 pm
Forum: Demos
Topic: Mega Fallout: Cassandra's Path
Replies: 9
Views: 531

Re: Mega Fallout: Cassandra's Path

Is it supposed to be __INTEGER_, __INTEGER__, or _INTEGER_? Compilers can be very picky about things like that.
by Chilly Willy
Sat Mar 10, 2018 3:41 pm
Forum: Demos
Topic: Unnamed "ninja" game (Dev Diary thread)
Replies: 123
Views: 4661

Re: Unnamed "ninja" game (Dev Diary thread)

It's coming along rather well. You're getting a decent number of different enemies, and things animate nicely.
by Chilly Willy
Fri Mar 09, 2018 4:14 pm
Forum: Megadrive/Genesis
Topic: Where do I start? I'm seeking technical documents.
Replies: 40
Views: 1516

Re: Where do I start? I'm seeking technical documents.

Easy68K has lots of example code, but here's a nice mini guide that uses Easy68K:

https://simpledevcode.wordpress.com/201 ... ogramming/
by Chilly Willy
Thu Mar 08, 2018 2:46 pm
Forum: Megadrive/Genesis
Topic: Where do I start? I'm seeking technical documents.
Replies: 40
Views: 1516

Re: Where do I start? I'm seeking technical documents.

Thank you - I'm reading them. A lot of addressing modes! Multiplications and divisions, 32 bit registers... why is that called a 16-bit processor? :? Because it uses a 16 bit ALU to do arithmetic/logic computations. Hence the reason that byte and word ops take the same time, but long ops take more ...
by Chilly Willy
Tue Feb 27, 2018 8:09 pm
Forum: Demos
Topic: Unnamed "ninja" game (Dev Diary thread)
Replies: 123
Views: 4661

Re: Unnamed "ninja" game (Dev Diary thread)

Damn! That's looking good! Still very reminiscent of Beast, but in a good way. :D
by Chilly Willy
Wed Feb 21, 2018 2:26 am
Forum: Blabla
Topic: C++ Libraries for Genesis Programming
Replies: 3
Views: 801

Re: C++ Libraries for Genesis Programming

That's pretty nifty! It would be really nice if you made arcs of the files... that would be easier for people here rather than being forced to cut-n-paste from the post.
by Chilly Willy
Tue Feb 20, 2018 5:17 pm
Forum: Video Display Processor
Topic: Tectoy's weird VDP behavior
Replies: 24
Views: 1786

Re: Tectoy's weird VDP behavior

That'd explain why Miniplanets crashes at random at least... (it probably breaks NBA Jam too then? or was that just controller access without halting the Z80?) The hardware bug that causes shortened cycles if certain circumstances occur when accessing IO without stopping the Z80 doesn't matter if t...
by Chilly Willy
Mon Feb 19, 2018 7:34 pm
Forum: Demos
Topic: Project C - WIP - Sega Genesis / Mega Drive
Replies: 24
Views: 1365

Re: Project C - WIP - Sega Genesis / Mega Drive

cero wrote:
Sun Feb 18, 2018 6:43 pm
Reminds me more than a bit of Duke Nukem 1.
Yeah, it sure does. It's coming along nicely. Nice parallax effects.
by Chilly Willy
Mon Feb 19, 2018 7:31 pm
Forum: Video Display Processor
Topic: Tectoy's weird VDP behavior
Replies: 24
Views: 1786

Re: Tectoy's weird VDP behavior

Just a suggestion - maybe waiting until the vblank to re-enable the video after the DMA. Another thought - do another (small) DMA operation after the video is turned on. Whatever the issue is, it's really weird. :?
by Chilly Willy
Thu Feb 15, 2018 11:17 pm
Forum: Tools
Topic: Algorithm for splitting sprites
Replies: 69
Views: 4618

Re: Algorithm for splitting sprites

Yes, I think that would probably work better. You might have a button to try one of the algorithms, show the result, and let the dev do any changes to make it better.
by Chilly Willy
Wed Feb 14, 2018 3:01 am
Forum: Demos
Topic: Unnamed "ninja" game (Dev Diary thread)
Replies: 123
Views: 4661

Re: Unnamed "ninja" game (Dev Diary thread)

Sik wrote:
Mon Feb 12, 2018 12:35 pm
It's the clouds.
And the ground... and the mountains in the back... it's all VERY similar to SOTB. Not exactly the same, but it does stir the nostalgia. 8)
by Chilly Willy
Wed Feb 14, 2018 2:58 am
Forum: Demos
Topic: AbbayeMD
Replies: 16
Views: 5573

Re: AbbayeMD

Awesome! Looks like a really cool game. Old platformers like this need some love. :D
by Chilly Willy
Sun Feb 11, 2018 10:12 pm
Forum: Demos
Topic: Unnamed "ninja" game (Dev Diary thread)
Replies: 123
Views: 4661

Re: Unnamed "ninja" game (Dev Diary thread)

Heh - nice use of the Shadow of the Beast background art. :D I loved the hell out of that series. It really demonstrated the best aspects of the Amiga.