Changes
* The snapshot format doesn't support additional hardware. A basic CPC464, CPC664, CPC6128 system is assumed.
* The snapshot format doesn't support KC Compact or Aleste hardware.
* The snapshot doesn't have knowledge of which ROMs are in use. This means it doesn't know which OS, BASIC or AMSDOS ROM, and nothing about expansion roms. On Plus range, it doesn't know which Cartridge is loaded.
The format generally assumes a base CPC6128/6128Plus system with no attached hardware except for up to 512K of dk'tronics compatible RAM.
