In an attempt to make it harder to copy the games, a number of different loaders were employed by TelecomSoft. The most popular of the loaders has retrospectively been christened “Bleepload”.
For those who aren’t technical, this system loaded the game in short, fast blocks. A hexadecimal number incremented each time a block was successfully loaded in. If one block failed to load in correctly, the player could rewind the tape by a few seconds and try again. (BBC Micro owners might recognise this general description as being very similar to the standard method used for loading BBC tapes!).
For those of you from a more technical background, the Bleepload data was structured from consecutively numbered sub-blocks. There was a short pause between each one, but often a copy of the tape would have corrupted pauses or pauses that were too small to register as a proper pause (20,000 cycles). This would cause the first byte on the following block’s pilot to also be corrupt.
Musician and programmer Melvyn Wright was the original creator of the bleepload system for BBC, CPC and C64 releases. It is currently unknown who implemented it on the Spectrum.