Search found 7 matches

by ember
Fri Feb 15, 2013 9:19 pm
Forum: NESemdev
Topic: confused about something about sprite rendering
Replies: 8
Views: 5508

Re: confused about something about sprite rendering

It's like starting any process. Seeking in an mp3 player is a good example. The simplest way is to seek to some arbitrary point in the file, possibly in the middle of a frame, but slightly before where you really want. Then run the decoder several frames so that any erroneous data's awful sound out...
by ember
Thu Feb 14, 2013 9:58 am
Forum: NESemdev
Topic: confused about something about sprite rendering
Replies: 8
Views: 5508

Re: confused about something about sprite rendering

THANKS! My SMB1 works fine after modified my sprite-0-hit trigger!
by ember
Thu Feb 14, 2013 3:00 am
Forum: NESemdev
Topic: confused about something about sprite rendering
Replies: 8
Views: 5508

confused about something about sprite rendering

will the sprite-0-hit set when *the priority of the sprite0 is 1 and the sprite0-pixel and bg-pixel are all not zero*? is the sprite evaluation performed in pre-scanline? from http://wiki.nesdev.com/w/index.php/PPU_rendering i read that the ppu doesn't perform sprite evaluation in pre-scanline, so t...
by ember
Tue Feb 05, 2013 9:29 pm
Forum: NESemdev
Topic: Super Mario Bros 1 Menu not working
Replies: 30
Views: 14803

Re: Super Mario Bros 1 Menu not working

Hi again guys. This keeps getting better and better ... But somehow I got it working... What did I change? Well... After 8 bytes I now return 4 (100b in binary) and when reading, I read the same controller from $4016 and $4017. I don't know what I changed but that "hack" put my controls t...
by ember
Mon Dec 31, 2012 4:45 am
Forum: NESemdev
Topic: does SMB use IRQ?
Replies: 5
Views: 5417

Re: does SMB use IRQ?

Unofficial instructions; they are far from undocumented. sorry "offical" is my phrase. btw, any difference between "unoffical" and "undocumented" here? i don't know.... the "offical" instuments in my post are the instruments listed in http://nesdev.com/6502.t...
by ember
Mon Dec 31, 2012 4:16 am
Forum: NESemdev
Topic: does SMB use IRQ?
Replies: 5
Views: 5417

Re: does SMB use IRQ?

There are a few exceptions though, some games use the built-in IRQ feature of the DMC channel to do split screens, such as Time Lord, Mig 29 Soviet Fighter, and Fire Hawk. And Chun Soft's really early games (Door Door, Dragon Quest, and Dragon Quest II) use the APU Frame IRQ to drive the music engi...
by ember
Sun Dec 30, 2012 10:15 pm
Forum: NESemdev
Topic: does SMB use IRQ?
Replies: 5
Views: 5417

does SMB use IRQ?

hello everyone, i'm making an FPGA-NES emulator and my "step one" goal is to run SMB. Right now i've almost finish the cpu 6502 and decide to run a part of SMB for testing interrupts and instruments. my issues are below: a few bytes i focus on in the PRG-ROM like this: 8000 : 78 sei ; 8001...