nesdev.com

Mesen is the front-runner for NES emulator video recording on Linux as of right now. I don't know what to recommend for Mac though.

Fixed. My fault. I've been away from Super NES for way too long, and 240x160 reminded me too much of another platform whose video output does have 228 total lines (160 picture + 68 vblank). In any case, I was trying to keep the best compromise among bandwidth, not spending time rendering pixels that...

If you want to use the GSU to target modern 16:9 60 Hz TVs, my best suggestion is a 240x160-pixel visible window. This is 38400 pixels, or 19200 bytes in 4bpp mode. The 8:7 pixel aspect ratio (on 60 Hz) will produce a 12:7 (1.71:1) display aspect ratio. You'll have (261 - 160)*165.5 = 16715 bytes of...

Might the current owner of the Teddy Ruxpin product identity object? I've read that one company to hold the rights successfully sued third-party publishers of compatible tapes.

On GB and on GBC in GB mode: Selection of the 10 sprites in secondary OAM is based on the 10 sprites with the lowest OAM index that intersect this scanline. Those 10 are sorted by horizontal position (left in front), with secondary OAM index as a tiebreaker (lower index in front). On each pixel, the...

The easiest way to work around a file size limit is to resize the images or slightly reduce the JPEG image quality. (If you need help doing that, I'll need to know what operating system your computer runs and what image editing software, if any, you have installed.)

Some traces on a printed circuit board appear to terminate but continue through a plated via , which carries the signal from one side of the board to the other. Other traces terminate to the edge of the board or to an unplated hole drilled for mounting the case. These traces go into a margin that is...

Either that or logic elements in Intel Altera CPLDs are a lot smaller than the Xilinx macrocells I'm used to, which hold one bit of state or control one multiplexed output. In any case, I doubt a full MMC1 would even fit in the good old 36-cell Xilinx CPLD: 25 bits of state (20 in registers, 5 in sh...

SelfMod, Dispatch via RTS, Double Interrupt stabilization, Main, IRQ, NMI and potentially BRK threads to consider, stack manipulation, rts chaining and just well I want to return a couple up so lets just pop a bunch of stuff off the stack and go for it. Self-modifying code can be handled the same w...

We'd be glad to take your Super NES development questions in f=12.

I'd suggest re-inventing new names entierely and never mention the word "stack" in it, because the main point is to not use a stack . Microchip's term. If the CS literature offers a better term, I'm willing to use it instead. When it comes to interrupt, I'd exclude them from auto-allocating in the ...

for 99.9% of all code targeting the NES you wouldn't use recursion anyway, but have all your functions use zeropage. The problem is you need to avoid collisions between different variables. But this is easily done by assuming no recursion / call-by-pointer and creating a "compiled stack" of zeropag...

Here's an obvious way:

UNROM, SGROM, SNROM, and TGROM cartridges have 8 KiB of CHR RAM. The program copies or decompresses data from PRG ROM to CHR RAM. Many mappers can bankswitch CHR RAM. This combines some of the advantages of CHR ROM with some of the advantages of CHR RAM. However, due to costs in the original commerc...

Would it be true then to say that: .bank 0 = first 8 kb of memory in the actual rom (.nes file) = byte 0 to byte 7999 ? .bank 1 = second 8 kb = byte 8,000 - byte 15,999 ? .bank 2 = third 8 kb = byte 16,000 - byte 23,999 ? .bank 3 = fourth 8 kb = byte 24,000 to 31,999? Almost, except the banks are 8...