Exploring Ideas

In the 1970s and early 1980s, many home computers didn’t come with floppy drives because they were too expensive. Instead, they used standard audio cassette tapes (Compact Cassette), the same kind people used for music, to save and load programs. The computer would convert digital data into sound, often a series of screeches and tones, which could then be recorded on a cassette tape. To load the program back, the tape player would send the sound into the computer, which decoded it into digital form once again. This method worked, but it was slow and sometimes unreliable. Loading even a small program could take several minutes, and a misaligned tape head or a damaged portion of tape could easily corrupt the data. One of the most famous computers to use this system was the Sinclair ZX Spectrum, released in 1982 in the UK and also brought to India by enthusiasts. The Spectrum connected to an ordinary cassette recorder through audio cables, while its display output was usually ...