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Update today. versions 3,4, and 5 https://github.com/nesdoug/famitone3.3 https://github.com/nesdoug/famitone4.1 https://github.com/nesdoug/famitone5.0 I've had several requests to make the volume column behave exactly match the famitracker's driver, so I added a 256 byte volume table. It will increa...

The MMC5 board could do multiplication. That's sort of like a coprocessor... with very limited processing ability.

I own "6502 assembly language programming" by Lance A. Leventhal. It is good, except that it contains examples that are no longer relevant, such as the 7 segment display, or the teletype machine. It's also a bit large (600 pages). But I use it for reference, as it has a detailed explanation of every...

Looks good.

LDY #$0220 ;size of DMA transfer STY $4305 This is copying all 128 sprites. stz $4302 stz $4303 from $0000 RAM, using that as the OAM Buffer. So, you just need to write your sprite variables to 0000-0007, then call the DMA code. JSR SetupVideo (poorly named subroutine, should be called SpriteDMA or ...

So the OAM is split into a low table (512 bytes) and a high table (32 bytes). low table = 4 bytes per Sprite x, y, tile #, attributes high table = 2 bits per Sprite sx (size, x 9th bit) If you have the first Sprite's tiles at $0000 and the 2nd Sprite's tiles at $800... it is $20 bytes per 4bpp sprit...

SpriteConsoleAddress and SpriteBikeAddress are PPU address, not OAM (sprite memory) addresses.

I don't see any code (like s DMA) to send anything to the OAM memory.

Typically, you would set aside a 544 byte ($220) area in the CPU RAM as a buffer and then copy it all to the OAM with a DMA.

I have a PowerPak and Commando freezes on me after a few screens of scrolling up.

If I recall, I had a hard time with Castlevania 3, and ended up just buying the cartridge.

I recommend you start a new thread, and ask questions there, rather than posting on old threads.

I made a tile editor (BG) for mode 1. https://github.com/nesdoug/M1TE2 And a sprite editor. https://github.com/nesdoug/SPEZ another tile editor, yy-chr https://w.atwiki.jp/yychr/sp/ I also highly recommend MESEN-S emulator. https://github.com/SourMesen/Mesen-S/releases music tracker https://github.c...

PCM could be mixed.

It would be a very slow process, and in the end you would have only 0.5 - 1 seconds of audio. (for a $2000 byte PRG RAM)

I think enough time has passed to discuss. I could only fit 8 seconds of FMV with audio into 64k. I wanted to do 16 seconds, the entire chorus, but the audio was too lousy at reduced sample rate. This is PCM at 4000 Hz x 8 seconds = 32k audio. That's pretty much the low end of audio quality. I check...

Does it need to be NROM? You could use a mapper with single screen mirroring, such as AxROM or MMC1. You would use mapper registers to swap nametables. The main screen on one nametable, the HUD on another nametable. Example, Cobra Triangle. I can't remember what it uses to time the split, but sprite...

I can't find any technical information. I don't own one. Maybe next year I will get one.

Everdrive N8 Pro (Famicom) supports MMC5 audio.