The Hammer Of Retribution Ogg-Cast
www.thorcast.co.uk

 

RZX ACTION REPLAY FILES

ZX Spectrum emulation started almost as soon as the last Amstrad-built models had left the shelves in 1993, and in the intervening two decades plus, just about every aspect of the original machines has been emulated. There are tape images, disk images for both the +3 and the later Russian clones, microdrive images, Interface 2 ROMs, memory snapshots, poke files, all of which relate to the original machine and its various peripherals. But one interesting addition was the RZX file format, which could recreate a series of keystrokes at precise times to make an action replay, usually of a game being played, provided the initial tape or disk file is available.

This is a much more efficient method of recording action replays compared to video. The RZX of Jet Set Willy II, which takes 67 minutes to play back, is only 413 KB; the equivalent 480p video is 153 MB and at 720p this expands further to 480 MB. Admittedly a video file can be rewound or spun forwards, but for the size of the files, RZX is unbeatable.

The RZX Archive hosts a ton of these action replays that have been submitted by avid Spectrum gamers; Spectaculator, ZX Spin and FUSE (which I recommended on the main Spectrum page) can all play them back. I've done a few myself - some are on the RZX Archive, some other bits and pieces that are less suitable for that site I've hosted here.