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License: MIT License
Weaknes is a NES emulator written in JavaScript.
License: MIT License
FPS is about 30 ~ 40.
PPU's $2000 register, The bit of Background CHR start address is changeable when rendering.
Algorithm of selecting current namtable is not correct.
Perhaps, need to implement PPU internal registers.
The following functions should be placed in cpu/ram.js.
Lines 113 to 123 in f7d6141
Zero sprite hit algorithm is not correct.
At any pixel where the background or sprite pixel is transparent
https://wiki.nesdev.com/w/index.php?title=PPU_OAM&redirect=no#Sprite_zero_hits
weaknes/src/cpu/opcodes/0x0x.js
Line 4 in af24ee3
Perhaps, it should be changed the following.
{ instruction: 'BRK', addressing: 'implied', cycles: 7 },
Other opcodes like this.
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