Tracking issue for cycles

[AlessioC31]

• [x] Base structure
• [ ] Memory regions wait cycles (https://rust-console.github.io/gbatek-gbaonly/#address-bus-width-and-cpu-readwrite-access-widths):
  • [x] BIOS
  • [ ] Work RAM 32k
  • [ ] I/O
  • [ ] OAM
  • [ ] Work RAM 256k
  • [ ] Palette RAM
  • [ ] VRAM
  • [ ] GamePak ROM (look at https://rust-console.github.io/gbatek-gbaonly/#gbasystemcontrol)
  • [ ] GamePak Flash
  • [ ] SRAM
• [x] Move ppu, etc... to bus
• [ ] Check every instruction for I cycles
• [ ] Open bus behaviour (probably not needed for cycles) (https://rust-console.github.io/gbatek-gbaonly/#reading-from-unused-memory-00004000-01ffffff10000000-ffffffff)