nesdev.org

Ok, here it is; (ATB and ATB2 are arrays that refer to the bits to check i.e. ATB[0] = 0x01, ATB2[0] = 0x02 and so on...) tileno = 0...960 and temp is the attribute byte to use int tileno = (PPU.Address & 0x3BF); int temp = 0x23C0 + (PPU.Address & 0xC00) + (((PPU.Address & 0x3A0) / 0x80)...

Whenever my emulator fetches the attribute table data it fetches data from two tiles above.

Example

Tile #;

128 129 130 131

Fetches #;

64 65, 66, 67

Any suggestions why? I have checked my code and it seems to be ok but is really holding back my emulator.

Does anyone know of any games that actually use the BRK opcode? I can't imagine so, as the vector is the same as the sound's, unless you wanted to prematurely process sound code...

What's your source on the RESET interrupt setting the flag?

Maybe this quote from Wikipedia.org helps;

...during its first year, many criticized the system as unreliable, prone to programming errors and rampant freezing. Following a product recall and a reissue with a new motherboard...

Does anyone know of any emulators that ignore the brad taylor rendering docs and just render the whole screen at a time or execute 113 CPU CC's then draw the whole scanline etc. etc.

Sweet dude.

Does anyone actually have a copy of this ROM? Everywhere I go the file just downloads like a HTML file and when I try to convert it to a NES ROM it still doesn't work. Does anyone know of a good copy or can someone email me one?

From everynes.htm: Used by Gun Sight (Laser Invasion), Uchuu Keibitai SDF, Bandit Kings (Suikoden), Castlevania 3, Nobunaga Sengoku (Nobunaga's Ambition 2), Nobunaga Bushou, Shin 4 Nin Uchi Mahjong, Ishin no Arashi, L'Empereur, Ganbare Goemon Gaiden (bugged hack?), Romance of the Three Kingdoms 2 (S...

Horizontal mirroring. I got it from DohGames.com and it is apparently a good dump (Son Son (J).nes). However, when I set it to vertical mirroring Nintendulator ran it fine.

Did you check out my link? Am I the only person to have that affect?

Well check out the link below to see what I mean.

http://www.geocities.com/legocentric/sonson.JPG

Er, you'd have to be blind not to notice the platforms blinking like that. I am using the lastest versions of both emulators. The exact same bug appears on FCEU.

BTW Nestopia's sprite bug appears on both emulators, so maybe it is normal.

Well, I have a question for you. Are you writing your own emulator? If not then don't worry if Nestopia/Nintendulator can't run these mappers correctly. Let their respective authors deal with that. If so, then 118 is another fine example of a poorly documented mapper which, in reality, doesn't need ...

Yes this is true. On Nintendulator the platforms keep flashing yellow when they should not. However, when the 3 sprites are picked up in the intro there is a small graphical glitch on Nestopia. So neither is perfect but well spotted. I have always felt the Nestopia is better.