nesdev.org

May I ask, why you decided to do Asteroids? In my opinion, it is one of the least suitable games for NES hardware, because of sprite limitations (total and per scanline). It is also certainly more complicated (CPU-heavy) than Space Invaders and Tetris - many freely moving objects of different sizes,...

This is Nes Dev forum. tepples, as one of well known homebrew devs here, just noted that it isn't the best emulator for devs, as it lacks debugging features. Although they could be added into the emulator, no one is up to this task. A good debugger, at least comparable to FCEUX's one, is not easy to...

It is not 'sample mixing', as there are no samples (waveform recordings) for sound effects in most NES games. Sound effects on NES is kind of a sub songs, sometimes interpreted by song player as one of channels, sometimes by its own separate player, in any case, using one of ways of channel replacem...

Maybe someone with python and NES asm knowledge could write some functions that could load NSFs made with FamiTracker and play specific songs with ability of mixing some samples in? I'm unfortunately not up for the task. It does not really works this way, with loading and mixing NSFs. NSF format is...

Elite is perhaps the most famous for this. Wikipedia even says it was the first video game with a novel included. I also recall a fiction book from late 1990s that was loosely based on UFO: Enemy Unknown. Not sure if it was licensed, though, but it was published as a normal book, with good print qua...

GB Kid Icarus (a sequel, in fact) is not more similar to the NES game than games like Duck Tales or Mega Man. I.e. it is similar in design and gameplay, reuses the same graphics, but has many differences, like less levels, different level maps, etc. Kid Icarus has the maze levels that aren't present...

But is the access similar enough so that I could just declare a sub routine for it and implement both versions in different source files and link them accordingly, so that the outer code still remains the same? Or are the systems so different that the whole structure and of the source code would be...

GBA is way more powerful than SNES, so no, porting as is is not possible. Demaking is more correct approach.

GB used to have active scene in late 90s and early 2000s. It grown pretty large in GBA days, but now it seems all declined.

If you want compare a number, well, ;value to test in A cmp #$08 beq address ; go somewhere if A=$08 However, if you want to test a bit, say, it is bit 3, which is $08 bitmask, then just use AND: ;value to test a bit in A and #$08 bne address ;go somewhere if bit 3 is set, i.e. and result is non zero

Your code gives correct result, as 0x95 'and' 0xfd is 0x95.

If you want to replace low nibble, you should 'and' 0xf0 then 'or' new value (like 0x05).

In case of an emulator, measured delay will work anyway. So unless user will intentionally attempt to press a button in a precise moment of time, it still will work, just with less randomized initial state.

Why bother with asking user to perform some crazy actions to initialize a RNG? Initial RAM state combined with measured delay between start up and first button press should be enough.

I suppose only those who scanned the manual could answer this, but an easy guess is that it simply didn't contain anything special (not covered by other 65816 docs), not worth effort of scanning, at least.

Tetris got its fame from MS-DOS PC port, but it began on an obscure LSI-11 based Soviet computer.