nesdev.org

Here is my nesasm code: .inesprg 1 .ineschr 0 .inesmap 0 .inesmir 0 .bank 0 .org $8000 RESET: lda #%10000000 sta $2001 FOREVER: jmp FOREVER .bank 1 .org $FFFA .dw 0 .dw RESET .dw 0 In Nestopia there is nothing, however in fceux, it gets its function(display blue)...Nowadays I'm confusing about the d...

But I don't think it's ca65's mistake. I mean the problem showed up in different emulator environment. The emulator provides a virtual environment to run nes, as far I know, there is not a standard for all developers who work on emulator. So I think the different may be a common question.

Nestopia is OK.
nesasm is the only universe way?

Ah...Say I use most simple code here: #include <conio.h> void main() { clrscr(); gotoxy(10,10); cprintf("Hello, world"); while(1); } When it was compiled, I dragged the nes file to FCEUX, but nothing happen. However, when I use fceu dsp , "Hello, world" came out. That mean differ...

The demo nes run out nothing in FCEUX 2.1
What's wrong?

Thank you. May I ask things about cc65?

This stuff all depends on the memory map. If you have a 16K PRG game, it will be mirrored across the full 32K ROM address space. If you have a 32K PRG game, it will fill the entire 32K ROM address space. If you have a bigger ROM which requires bankswitching, it depends on the mapper. Most mappers w...

one iNES bank or two NESASM banks Oh, this can explain why in NESASM codes' head there always be a declaration: .inesprg 1 Is it mean that "I am declaring a iNES file format" so even NESASM need two banks, the coder should write like that( .inesprg 1)? But the next line .ineschr 1 show 1 ...

I read that in the structure of NES bus Program Code begin from $8000. But I saw lots of code write : .bank 0 .org $C000 Why do this ? And when I use ".org $8000", however, using Debugger find in position $C000 my codes appear again. How can it be done? My knowledge about NES Asm is all fr...