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z80 format can save only 48K snapshots, and has the following header: Offset Length DescriptionĢ 2 BC register pair (LSB, i.e. z80 format have also been made by other emulators. For ease of notation, these will be referred to as versions 1, 2 and 3 of the format respectively. z80 format was originally developed by Gerton Lunter for use in his Z80 emulator, and three versions of the format, as saved by Z80 versions 1.45 (and earlier), 2.x and 3.x (and later) are in use.

AsĪ result of this, they cannot be used to reproduce the original tape from a snapshot file, but do load almost instantaneously. z80 format is arguably the most widely supported by emulators across all platforms.z80 filesĪre memory snapshots - they contain an image of the contents of the ZX Spectrum memory at a particular instance in time.