Search found 11 matches

by TailChao
Wed Dec 18, 2019 10:15 am
Forum: Other Retro Dev
Topic: I am a turncoat. A simple sprite demo for Sega Master System
Replies: 44
Views: 13537

Re: I am a turncoat. A simple sprite demo for Sega Master System

I dealt with all that in in HH85 ... Sure, and that's a fine approach to apply here if the visuals are designed for this update style. The only drawback I can think of is if your animation timing isn't even (i.e. heavy use of smears which last two or three frames). Otherwise no problem. You mean fo...
by TailChao
Wed Dec 18, 2019 8:14 am
Forum: Other Retro Dev
Topic: I am a turncoat. A simple sprite demo for Sega Master System
Replies: 44
Views: 13537

Re: I am a turncoat. A simple sprite demo for Sega Master System

There are 70 lines of vblank, and VRAM updates are allowed to extend past vblank so long as you avoid (or tolerate) tearing and don't write twice in (I think) 26 cycles. I satisfied the latter constraint just by moving some inc hl instructions around. Overall, the architecture appears to encourage ...
by TailChao
Mon Feb 25, 2019 10:00 am
Forum: Other Retro Dev
Topic: Rikki & Vikki (Atari 7800)
Replies: 21
Views: 26172

Re: Rikki & Vikki (Atari 7800)

Hey, thanks! If that trailer is footage of the actual game on the atari 7800 then you guys outdid yourselfs. Looks phenomenal. It is, yes. You can actually see NTSC artifacts and some graphic tearing from when the game hits Maria's bandwith limit. The music and voice work were added in post though (...
by TailChao
Thu Dec 20, 2018 10:30 am
Forum: Other Retro Dev
Topic: Rikki & Vikki (Atari 7800)
Replies: 21
Views: 26172

Re: Rikki & Vikki (Atari 7800)

I have one question, that is how does the MARIA chip work, I mean, what are the practical graphics limitations of the 7800? Sure, and to be fair I don't think that documentation does a good job describing how Maria actually does her thing. Much of the available literature describes Maria in terms o...
by TailChao
Thu Dec 20, 2018 7:16 am
Forum: Other Retro Dev
Topic: Rikki & Vikki (Atari 7800)
Replies: 21
Views: 26172

Re: Rikki & Vikki (Atari 7800)

Woof! Woof! (I'm an account-dog being possessed by the spirit of the game designer ... (RUFF!) Thanks for the interest! We're launching in a week, so I'm a little busy, but if you have any questions I'd be happy to answer them. I thought you'd like to know. Now it's time to become a regular lurker a...
by TailChao
Fri Sep 05, 2014 9:57 am
Forum: NESdev
Topic: The NES vs. its contemporary competition
Replies: 149
Views: 30439

Re: The NES vs. its contemporary competition

Exactly how slow is the Lynx's cart interface? Are we talking 1x CD-ROM slow, FDS slow, or C64 tape slow? Even the Game Boy Advance has seek time greater than sequential read time, yet it's still fast enough for XIP because the memory controller prefetches up to eight Thumb opcodes from ROM during ...
by TailChao
Fri Sep 05, 2014 8:43 am
Forum: NESdev
Topic: The NES vs. its contemporary competition
Replies: 149
Views: 30439

Re: The NES vs. its contemporary competition

Nor were most of the Lynx game developers, which was part of the problem... The breadth of those problems could fill a sizable book. Regarding resource sharing: One thing that really impacts resource sharing is how the platform's memory is actually set up. For example, most consoles have execute-in...
by TailChao
Thu Sep 04, 2014 8:28 am
Forum: NESdev
Topic: The NES vs. its contemporary competition
Replies: 149
Views: 30439

Re: The NES vs. its contemporary competition

tepples wrote:One thing that has worked for me for hi-hats on NES is alternating between 93- and 32767-step sequences on successive frames. I wonder if alternating 63- and 4095-step LFSRs might work for you.
I did not even think to try that. Thanks!
by TailChao
Thu Sep 04, 2014 8:18 am
Forum: NESdev
Topic: The NES vs. its contemporary competition
Replies: 149
Views: 30439

Re: The NES vs. its contemporary competition

Interesting, thanks for the info. Another sound chip that uses type of synthesis was in the Atari Lynx. It's LFSR, but for each channel it lets you select the taps and seed value, and I think that is a really cool idea. But I've played some Lynx games (not a lot of them), and I've only ever heard t...
by TailChao
Thu Oct 25, 2012 5:41 pm
Forum: Other Retro Dev
Topic: Megaman 2
Replies: 19
Views: 9413

Re: Megaman 2

(Tailchao made a new hucard mapper for PCE with expand ram and rom, but no emulator supports it yet that I know of). Actually it's partially supported in newer builds of Mednafen. I didn't even find this out until upgrading to 0.9.26 awhile ago, and my builds stopped working. Reads from any address...
by TailChao
Sat Oct 20, 2012 10:10 am
Forum: Homebrew Projects
Topic: How to Submit Game to Indie Publishers
Replies: 35
Views: 8608

Re: How to Submit Game to Indie Publishers

Maybe I can answer this- The publishers you mentioned don't look particularly special to me. They don't look anymore professional than any of the other hobbyists involved in this retro business. I know that many of these so called "publishers" don't even manufacture their own PCSs and cartridge case...