Search found 81 matches

by Graz
Sat Jun 12, 2010 11:47 pm
Forum: Demos
Topic: Scening
Replies: 19
Views: 9213

Fair point. Well, if I can find something that seems right that uses FM only, I can use it. There's a lot of cool stuff on 8bc. However, if you get the timing right, the sample rate high enough, and suitable source material, I think DAC music can be usable. Both are options. I just don't want to exc...
by Graz
Sat Jun 12, 2010 9:05 pm
Forum: Demos
Topic: Scening
Replies: 19
Views: 9213

For music, I can use anything - not necessarily FM or tracked, even. There are some constraints, but I'm planning to only use DAC for audio. I think the music influences the design quite heavily. Anyway, even if I knew what the design was going to be ahead of time, I don't have the artistic skill to...
by Graz
Sat Jun 12, 2010 8:11 pm
Forum: Demos
Topic: Scening
Replies: 19
Views: 9213

Scening

I've been working on a bunch of demo effects on Genesis and I think I have enough to put together a reasonable production. Problem is, I have absolutely no artistic or musical talent. Everything I have now is programatically generated (which looks OK), ripped, or is 'programmer art'. Anyone interest...
by Graz
Fri Jun 11, 2010 2:14 am
Forum: Tools
Topic: BMP to MD file converter
Replies: 14
Views: 5682

Using two layers is the "easy" way out. Yup, you're right, it was pretty easy to implement. I kind of had a different goal in mind though. I'd like to be able to put arbitrary colors next to each other rather than be constrained to using a fixed set of 15 colors within a single block. My idea is to...
by Graz
Fri Jun 11, 2010 12:52 am
Forum: Tools
Topic: BMP to MD file converter
Replies: 14
Views: 5682

I wrote my own command line tool to do this (and a bunch of other tile munging stuff). It works OK, but I need to find better palette selection algorithms. I might try the NeuQuant algorithm that mic_ linked to. Here's what I get right now... Layer A: http://img819.imageshack.us/img819/9499/planeb.p...
by Graz
Tue Mar 02, 2010 2:07 am
Forum: Megadrive/Genesis
Topic: Official Sega Documentation, More is required?
Replies: 11
Views: 4968

Sounds like he's saying that yes, they still have that documentation and that they will give it to you for a big pile of money, if and only if they believe that you won't distribute it, and that if you do, they'll beat you to death with the lawyer stick.

Are you offering to be our sacrificial lamb?
by Graz
Tue Mar 02, 2010 1:56 am
Forum: Hardware
Topic: i have released my everdrive MD flashcart for SEGA
Replies: 17
Views: 39041

ROM memory based on m29w640, it is flash, 8mb, but only half of this chip used for ROM That is a 3.3V supply part with an absolute max supply voltage of 4V. I assume you've used a 3.3V regulator for supply, but I don't see any level shifters in your pictures and the IO isn't 5V tolerant. How does i...
by Graz
Sat Jan 16, 2010 3:20 am
Forum: Blabla
Topic: Some replacement 74 series suggestions
Replies: 9
Views: 4380

Have you tried ebay?
by Graz
Thu Jan 14, 2010 12:45 am
Forum: Super 32X
Topic: DMA to PWM
Replies: 43
Views: 20701

I started with the leaked official docs, and it seemed pretty much obvious to me. I thought it was the recommended way to do things.
by Graz
Thu Jan 14, 2010 12:40 am
Forum: Video Display Processor
Topic: Megadrive video timings
Replies: 120
Views: 64556

Another thing I documented a long time ago.
Any chance that documentation is available for us to read?
by Graz
Thu Jan 07, 2010 10:45 am
Forum: Megadrive/Genesis
Topic: Making Commercial Games
Replies: 20
Views: 6849

Many GPL'd libraries (such as newlib and libgcc) include explicit clauses in their copies of the GPL that permit distribution of code linked against them in binary form for any purpose. The GCC docs even says explicitly that code compiled with GCC (the output of the compiler) is not automatically GP...
by Graz
Sat Jan 02, 2010 1:24 am
Forum: Video Display Processor
Topic: Sprite Table Address Wierdness
Replies: 16
Views: 7174

When exactly do you change the SAT address in VDP register ? I change it shortly after the VINT, although I don't have an exact cycle count. However, I only change it once every 30 frames or so. I assumed that even if my change was too late to make the current frame, it should get picked up for the...
by Graz
Fri Jan 01, 2010 7:54 pm
Forum: Video Display Processor
Topic: Sprite Table Address Wierdness
Replies: 16
Views: 7174

Sprite Table Address Wierdness

I've been experimenting with updating the sprite table mid-frame. I'm trying to prod the sprite attribute table base address register during the frame. I have been getting odd, partial results so I did a quick experiment. I have four, statically generated sprite tables in VRAM, one at each of 0xD000...
by Graz
Thu Dec 10, 2009 12:15 am
Forum: Super 32X
Topic: DMA to PWM
Replies: 43
Views: 20701

I got it working but only tested in the emulator. My ability to run on real hardware is a little hampered right now, so I never got around to testing. I do have all the relevant kit, though, so I can get it all back together. I'll probably be able to give it a shot in a couple of weeks. I'll post ag...
by Graz
Mon Dec 07, 2009 9:39 pm
Forum: Megadrive/Genesis
Topic: Neo Myth Menu beta
Replies: 36
Views: 11226

Yup, missed that post. Beta 4 lasted what, 3 hours. :shock: Good to hear you're making progress on the performance. I'm pretty tempted to go out and get one of these things just to play around with this.