1.29:

- added three levels of synchronization:
  NORMAL MODE: synchronizes on every interrupt
  FAST MODE: does not synchronize, but ints are still generated at 60 Hz
  TURBO MODE: ints are generated at more than 60 Hz
  "M" key switches between the modes
- removed useless debug commands: X, P, K
- added EX (SP),IX -> now Animal Basket is playable
1.30:

- added IN reg,(C)