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Just to understand your reasoning, you are saying ppu ad0-ad4 are working to address a 32 byte chunk, and ad5 is broken resulting in the wrong 32 byte chunk? A0-A4 are used to select individual bytes within a 32-byte chunk - A5 (and everything above it) is what selects the 32-byte chunk itself. He'...

$ file /cygdrive/c/Emul/SNES/bsnes_v108-windows/bsnes.exe /cygdrive/c/Emul/SNES/bsnes_v108-windows/bsnes.exe: PE32+ executable (GUI) x86-64 (stripped to external PDB), for MS Windows "x86-64" means that it's a 64-bit binary, so there's no way you'll be able to run it on a 32-bit operating system. I...

For some reason, I'm not seeing any randomness - every time I reset and press Start (no matter how long I wait between them), I get the exact same layout. Of course, in order to even get the ROM to work, I had to set the Battery flag in the .NES header, since the emulator I use doesn't map RAM at $6...

According to "Synertek Hardware Manual" branch operations cycle breakdown look something like this Address Bus Data Bus T0 PC OPCODE T1 PC + 1 OFFSET T2* PC + 2 + OFFSET OPCODE T3** PC + 2 + OFFSET + C OPCODE * skip if branch not taken ** skip if branch not taken; skip if branch operation doesn't c...

rainwarrior wrote: ↑

Thu Mar 19, 2020 8:03 pm

By the label, the game seems fairly well known. Might be a prototype version of it?

I find it highly unlikely that it would be a prototype, given that the board has glop-top ROMs (which are a fairly definitive sign of being mass-produced)...

Thank you both. One more thing I'd like to confirm: Is there not a way to utilize both nametables (0 and 1) for a single background? I'm trying to break up my loop to where it loads 960/2 = 480 bytes from nametable 0. Then I would write #%10010000 to $2000 (I was hoping this would cause the next by...

Permadeath can be okay as long as there are strategic ways to avoid dying - for example, if there are enemies that can one-shot kill you, they will be a source of extreme frustration unless you can reliably avoid or defend against their attack.

Firstly, what does driving all the address line pins to their "appropriate states" mean? I meant that if you wanted to read from address 0xC000, you'd want to set A0-A13 to be Low and A14/A15 to be High, but because A15 isn't directly present on the cartridge connector, you'd only set A14 directly ...

In order to interact with an NES cartridge, you're going to need a 5 volt I/O interface, so you'll need to make sure your Arduino can actually do that. Note that "5V tolerant" might not be good enough - those can typically handle 5V input but only generate 3.3V output, which might not be enough for ...

For what it's worth, in all of the places I've used bitfields in my own emulator (which is currently restricted to mappers), I've always specified types of "signed" or "unsigned" rather than types which imply specific widths (e.g. "unsigned coarseX : 5;").

Without being able to see more of the surrounding code, I can only assume that you're running into something like a branch distance overflow - relative conditional jump instructions (BEQ, BNE, BPL, BMI, BCC, BCS, BVC, BVS) can only reach about 127 bytes in either direction, so if you've got logic th...

Nintendulator's supported it since December 2011, mainly for the purpose of playing the game "Thwaite".

So, I just found another problem: when you turn on the PPU, it's configuring the Sprites and Background to load from the same pattern table (i.e. it's writing $80 to $2000), which means no IRQs get generated if the emulator is doing "accurate" MMC3 emulation (see wiki for more info). Once I patched ...

It looks like by default 8bitworkshop compiler puts startup code at $C000, which with MMC3 might be swapped with bank at $8000 http://wiki.nesdev.com/w/index.php/MMC3#PRG_Banks https://forums.nesdev.com/viewtopic.php?p=121187#p121187 To clarify, the MMC3's only guaranteed "fixed bank" is at $E000-$...

Ever since the forum upgrade, it seems like spambots have been much more prevalent - did we lose (some of) our anti-spam measures in the process?