1805 TZX Format TZX is a casette tape image format originally created by Tomaz Kac and used by emulators of ZX Spectrum computer systems. 1 Digital Preservation Department / The National Archives 22 Mar 2017 22 Mar 2017 fmt/1000 PUID tzx File extension 1363 TZX Tape BOF: 'ZXTape!' 0x1A, Major version 01 http://www.worldofspectrum.org/TZXformat.html 1 Absolute from BOF 0 0 5A5854617065211A01