Search found 57 matches

by elusive
Wed Sep 26, 2012 6:26 pm
Forum: Video Display Processor
Topic: Opacity
Replies: 15
Views: 12240

Alright. I got it to work :) I did have to make the the background layer tiles at a high priority as well, otherwise everything you explained was perfect.

What are some of the creative things that can be done with shadow/hilight?

Thanks!
by elusive
Tue Sep 25, 2012 7:20 pm
Forum: Video Display Processor
Topic: Opacity
Replies: 15
Views: 12240

Re: Opacity

Thanks Charles! Just a couple of questions: Does this require shadow/hilight to be enabled? Also, the character sprites need to be a lower priority early in the list, and the bright pillars are high priority later in the list. Wouldn't that make the character sprites places behind the bright pillars...
by elusive
Sun Sep 23, 2012 5:37 pm
Forum: Video Display Processor
Topic: Opacity
Replies: 15
Views: 12240

Opacity

I know the Genesis/Mega Drive doesn't have hardware opacity for sprites or layers, but I've seen it in a few games where it doesn't look dithered (Crusaders of Centy/Soleil, Adventures of Batman & Robin, etc). How can this be achieved? I thought I saw something a while back about layers and sprite p...
by elusive
Thu Sep 13, 2012 10:30 pm
Forum: SGDK
Topic: Game >4Mo?
Replies: 25
Views: 14319

That's my plan for a new Doom for the 32X. :lol: When the player finishes the last level in the rom, the game automatically makes a save that the next rom looks for on starting to continue right where they left off. How are you planning on storing the SRAM and transferring it to the new cart? I'd b...
by elusive
Thu Sep 13, 2012 5:37 pm
Forum: SGDK
Topic: Game >4Mo?
Replies: 25
Views: 14319

maybe two ROMS is acceptable, like "please insert Disk 2", i'm sure it won't hurt. That's my plan for a new Doom for the 32X. :lol: When the player finishes the last level in the rom, the game automatically makes a save that the next rom looks for on starting to continue right where they left off. ...
by elusive
Fri Sep 07, 2012 2:24 pm
Forum: Megadrive/Genesis
Topic: Preferred Way of Developing to Genesis Hardware
Replies: 34
Views: 19427

Some 3 - 4 MB games use bank switching as well (World Series 95, Mortal Kombat 3, etc). WS95 is a 3 MB game, so I'm assuming the board takes 2 2MB eproms. Would you be able to use that with 4 MB eproms or no? What you call bankswitching is a simple address decoding logic which select ROM chip upon ...
by elusive
Thu Sep 06, 2012 4:52 pm
Forum: Megadrive/Genesis
Topic: Preferred Way of Developing to Genesis Hardware
Replies: 34
Views: 19427

It's games bigger than 4MB that use bank switching. Any bank switching is in the cart, so you'd have to handle it yourself, and doing any kind of bank switching other than the standard mapper would prevent your code from working on emulators. While a CD probably would be cheaper than a flash cart, ...
by elusive
Fri Jan 27, 2012 4:15 pm
Forum: Video Display Processor
Topic: Horizontal Interrupts & Rasters
Replies: 8
Views: 6308

Thanks for the clarification :)

I'll start messing around with these modes when I get home from work. Thanks Charles!
by elusive
Fri Jan 27, 2012 1:00 pm
Forum: Video Display Processor
Topic: Horizontal Interrupts & Rasters
Replies: 8
Views: 6308

Okay, I understand the theory behind that, I think :P In Vertical Column scrolling, doesn't each value move 2 columns together? You mention that even values scroll columns 0 through 19 on A, and odd values on B. If I'm understanding you correctly, if I were to scroll, say, column 2, it would really ...
by elusive
Fri Jan 27, 2012 4:46 am
Forum: Video Display Processor
Topic: Horizontal Interrupts & Rasters
Replies: 8
Views: 6308

The part where the head rotates left and right during combat or the part at the end where it falls over? The former is a scrolling effect (using line scrolling and vertical column scrolling at the same time for shearing, which sort of approximates rotation -- notice the head never turns more than 4...
by elusive
Fri Jan 27, 2012 3:57 am
Forum: Video Display Processor
Topic: Horizontal Interrupts & Rasters
Replies: 8
Views: 6308

You're right, it was my code (too much in the hblank). The effect I'm interested in the most from Batman and Robin is the effect on the Cheshire Cat's face. Also, when fighting the Mad Hatter, are the sprites already prerendered that spin when he tosses them down, or is that a raster effect as well?...
by elusive
Fri Jan 27, 2012 12:10 am
Forum: Video Display Processor
Topic: Horizontal Interrupts & Rasters
Replies: 8
Views: 6308

Horizontal Interrupts & Rasters

Hi everyone, I'm somewhat new to programming for the Genesis/Mega Drive (about a year or so with programming for it), and I'm trying to expand my knowledge a bit, and having a hard time finding information and tutorials on a few things. First, I'm programming in BEX (I know, I know, no flaming pleas...