Search found 2650 matches

by Stef
Thu Dec 07, 2006 9:31 am
Forum: Cartridge
Topic: Problem with accessing SRAM
Replies: 10
Views: 4261

You have some banking control bit in the IO area of Genesis mem map.
The 0xA130F1 port control SRAM :
bit 0 : SRAM Enabled
bit 1 : SRAM ReadOnly

So take care of writing $01 to 0xA130F1 before writing to your SRAM.
$03 enable SRAM but in ReadOnly Mode
$00 desactive SRAM
by Stef
Thu Dec 07, 2006 9:22 am
Forum: Megadrive/Genesis
Topic: Genny and 3D
Replies: 138
Views: 31340

The 3D level of Toy Story is the most impressive imo. I do want to examine that game :p
The main trick is that they only render half of screen and use vertical flip for the other part, anyway, this is still quite impressive :)
by Stef
Wed Dec 06, 2006 9:22 pm
Forum: Super 32X
Topic: Any way to run 32X VDP without hurting MD mapping?
Replies: 7
Views: 5574

Not tested on real hardware but i think it will operate like this.
I can actually test rom on real hardware if you need it ;)
by Stef
Wed Dec 06, 2006 6:20 pm
Forum: Megadrive/Genesis
Topic: Genny and 3D
Replies: 138
Views: 31340

Megadrive hardware is really not designed for 3D rendering nor than bitmap drawing... for drawing a single pixel, you have to convert your bitmap coordinat in tile coordinate, then write mode access and adress to the VDP port, then write your pixel data. That's definitly not a fast way for drawing p...
by Stef
Wed Dec 06, 2006 6:06 pm
Forum: Announcement
Topic: Debugging emulator
Replies: 6
Views: 7281

Interesting :) i didn't know MESS was that advanced for debugging purpose.
by Stef
Wed Dec 06, 2006 12:57 pm
Forum: Sound
Topic: Programming Z80
Replies: 5
Views: 2390

I think you'll like the lib then :)
by Stef
Wed Dec 06, 2006 12:34 pm
Forum: Announcement
Topic: Debugging emulator
Replies: 6
Views: 7281

You're speaking with people devoted to the genesis Scene, because they like that ;)
by Stef
Wed Dec 06, 2006 12:25 pm
Forum: Sound
Topic: Programming Z80
Replies: 5
Views: 2390

If you like 3D processing you should have a look here : http://www.spritesmind.net/_GenDev/forum/viewtopic.php?t=14 It's the link of a mini dev kit i made for Genesis. I included some 3D features (transformations and flat drawing) in the lib . It's still very basic but you can play with them :) The ...
by Stef
Wed Dec 06, 2006 12:02 pm
Forum: Super 32X
Topic: Any way to run 32X VDP without hurting MD mapping?
Replies: 7
Views: 5574

I think that if 32X is disabled, you just can't access his parts :-/
by Stef
Wed Dec 06, 2006 11:59 am
Forum: Announcement
Topic: Debugging emulator
Replies: 6
Views: 7281

This page has links to some neat Genesis debugging tools : http://www.romhacking.net/?Category=&Console=11&Game=0&Author=0&Recm=&Level=&utilsearch=++Go++&title=&dsearch=&page=utils&action=utillist Gens Tracer is probably one of the most interesting : http://www.romhacking.net/utils/Gens2.12aR2Tracer...
by Stef
Wed Dec 06, 2006 11:52 am
Forum: Video Display Processor
Topic: Is DMA useful ?
Replies: 30
Views: 10895

As said Fonzie, DMA isn't that fast at all and it freezes your CPU when operating. Futhermore you have to take care to use it only during Vblanking (or anysort of VDP inactivity) or it'll be a lot slower. The VDP access VRAM during drawing and leave very few time to others part for accessing it. Gen...
by Stef
Wed Dec 06, 2006 11:21 am
Forum: Sound
Topic: Programming Z80
Replies: 5
Views: 2390

Hi, Thanks for this contribution, actually i find it very usefull :) It's true the genesis has 2 processors and it would be good to use their maximum potential ! I think i'll use your code to play a bit with :) Too bad the z80 stays a 8 bits processor, too weak for some 3D processings i guess. Maybe...
by Stef
Sun Dec 03, 2006 11:06 am
Forum: Tools
Topic: [MDPPY] Coming soon...
Replies: 14
Views: 6678

CodeBlocks is a powerful editor for developers. You can configure it in many ways, of course it offers the usuals syntax highlight, code completion... features. We can natively configure it for genesis GCC compilation but for convenience on my setup i just added some custom tools to compile my rom a...
by Stef
Sat Dec 02, 2006 6:48 pm
Forum: Announcement
Topic: Forum is now open to public
Replies: 49
Views: 31416

I just checked your sources. Your code is really well written, i do like :)
I've already almost of your functions except the SegaCD specific ones.
I'll check what i can do here :)
by Stef
Sat Dec 02, 2006 6:04 pm
Forum: SGDK
Topic: Sega Genesis Dev Kit (SGDK)
Replies: 762
Views: 251773

;)