NesDev

olc source code

CPU

Specification
- 2A03 = 6502 + audio
- 8-bit
- no builtin memory
- 16-bit bus, can address 64k
Memory
- connect to CPU via bus
- mapped to $0000-$07FF
APU
- mapped to $4000-$4017
Cartrige
- mapped to $4020-$FFFF , to the end.

PPU

Specification
- 2C02
- mapped to $2000-$2007
- has its own bus, can address 16k
Graphics Memory (mapping from cartridge)
- 8k, PPU $0000-$1FFF
VRam
- 2k
- PPU $2000-$27FF
Palettes
- PPU $3F00-$3FFF
Object Attribute Memory (OAM)
- is NOT available via any bus

Clocks

feed CPU & PPU
every clock tick
- PPU output a pixel to screen

Instructions