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License: MIT License
Weaknes is a NES emulator written in JavaScript.
License: MIT License
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
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
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.
FPS is about 30 ~ 40.
PPU's $2000 register, The bit of Background CHR start address is changeable when rendering.
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