Search found 616 matches
- Tue Aug 14, 2007 1:32 am
- Forum: Megadrive/Genesis
- Topic: newbie creating genesis graphics
- Replies: 68
- Views: 54726
The Megadrive had four 15/16-color palettes (one color from each palette is used as transparent, but it can be used to color the backdrop) for a total of 61 colors onscreen. So basically each sprite can only use 15 colors and each background tile (8x8 pixel square on a particular background plane) c...
- Wed Aug 01, 2007 12:42 pm
- Forum: Megadrive/Genesis
- Topic: getting started
- Replies: 21
- Views: 17055
- Fri Jul 20, 2007 5:26 pm
- Forum: Blabla
- Topic: Do you like this my MD2 ?
- Replies: 7
- Views: 8189
Are you decoding or just conecting the segments to random lines? I think it's just hardwired to display Sega (or as close as you can come on such a display anyway). My Genesis has a minor modification which allows me to disconnect the /CART_IN signal (useful for dumping), but my wiring came undone ...
- Thu Jul 19, 2007 2:04 pm
- Forum: Super 32X
- Topic: 32X strengths
- Replies: 42
- Views: 52062
There's not a lot you should do mid-screen. The manual doesn't mention the HBLANK explicitly but if it's the same transfer capacity mentioned for active scan then that's worth about 8 or 9 palette entries. When I was screwing around with Raster F/X I was able to turn off the display (required to pr...
- Wed Jul 18, 2007 2:19 pm
- Forum: Super 32X
- Topic: 32X strengths
- Replies: 42
- Views: 52062
The problem with this kind of render is that while you are updating via DMA you can't do anything else. Less of an issue on the Sega CD of course, since presumably the bulk of the processing on the faster Sega CD 68K. If you move from 40 cell mode (320x224) to 32 cell mode (256x224), you lose some ...
- Tue Jul 17, 2007 8:46 pm
- Forum: Super 32X
- Topic: 32X strengths
- Replies: 42
- Views: 52062
As far as DOOM goes, yeah, I suppose RAM limits would be a problem. I wonder how much a typical level takes? I'm sure the BSP and the textures are the bulk of it, but exactly how much? How does 32X DOOM deal with only having 256KB of RAM? I've never messed around with the guts of DOOM, but I'm goin...
- Mon Jul 16, 2007 4:55 pm
- Forum: Super 32X
- Topic: 32X strengths
- Replies: 42
- Views: 52062
heck, even Super Street Fighter II only pushed it to 6MB with bankswitching on the cart. Actually, it was only 5MB, but the problem is probably one of ROM cost than ability to access more space easily. I would think the limited RAM available in the 32X would make a 32X/CD DOOM port difficult though...
- Mon Jul 09, 2007 10:31 pm
- Forum: Mega/SegaCD
- Topic: SegaCD main routine
- Replies: 8
- Views: 11291
Heh, I have just the document with you. See this page: http://www.retrodev.com/segacd.html Start reading where it says "General" You can use the program BuildSCD from the same page to take care of putting together all the headers for you, or you can write some macros for your assembler. In either ca...
- Fri Jun 29, 2007 3:50 pm
- Forum: Megadrive/Genesis
- Topic: TIIDO'S SEGANE MEGA BENCHMARK !!!
- Replies: 9
- Views: 8114
- Thu Jun 28, 2007 2:28 pm
- Forum: Megadrive/Genesis
- Topic: TIIDO'S SEGANE MEGA BENCHMARK !!!
- Replies: 9
- Views: 8114
- Tue Jun 26, 2007 2:10 pm
- Forum: Hardware
- Topic: a mega-thermostat
- Replies: 8
- Views: 7918
The only problem I am seeing though, is a way to get the Genesis to read the thermistor (the resistor that tells temperatures).. I got the ratings for this specific thermistor, but how can I wire it up to the Genesis controller port, to actually read it? I don't see how something varying in resista...
- Tue Jun 19, 2007 6:47 pm
- Forum: Cartridge
- Topic: The not so famous /YS signal
- Replies: 28
- Views: 44471
I might be misremembering, but doesn't /YS have something to do with the priority flag? Basically, if the current pixel is a high priority pixel it's high, and if it's a low priority pixel it's low (or vice versa). I believe the 32X uses this to properly overlay it's video with the output of the Gen...
- Sat Jun 09, 2007 4:53 pm
- Forum: Hardware
- Topic: So I connected my MD2 to VGA monitor...
- Replies: 5
- Views: 6226
- Fri Jun 08, 2007 9:20 pm
- Forum: Tools
- Topic: TFM Music Maker
- Replies: 278
- Views: 345235
MOD, yeah, there is no documentation about the megacd boot... Does the 32x shift the mapping when turned on when in megacd mode, that would be double insane ^^? Well it might remap the cartridge port from $400000 to the 32X banked address, but unless you've got some kind of crazy cart + CD combo ga...
- Thu Jun 07, 2007 5:24 pm
- Forum: Controls
- Topic: About Peripherals
- Replies: 37
- Views: 63425
They're electrically compatible in the sense that the Saturn controller port and the Genesis controller port are both 7-bit bi-directional I/O ports. Unfortunately, the protocol is different so a Genesis game won't know what to do with a Saturn controller. You could support them in code you write ho...