Archive for Clive Sinclair

R.I.P. Clive Sinclair (1940-2021)

Posted in Biographical, History with tags , , , , , on September 17, 2021 by telescoper
Clive Sinclair, with the Sinclair C5

I heard last night of the death at the age of 81 of (Sir) Clive Sinclair. The news brought back a flood of memories.

I am of a generation that began secondary school (a grammar school in my case) before pocket calculators were generally available, so my first two years of secondary mathematics education including learning how to logarithms for multiplying and dividing numbers. After that, from the third year onwards, slide rules were in use but by the time I got I got into the 3rd form these had been phased out and replaced with electronic calculators. The first commercially available such device was produced by Sinclair. I didn’t like the Sinclair calculator, however, which had a reputation for unreliability so my first simple calculator was a Casio machine which, if I recall correctly was also cheaper. Later on when I wanted a more advanced calculator I went for the wonderful Hewlett Packard HP32E, complete with Reverse Polish Notation.

I got interested in computing at school too. The machines we had available were Commodore PET machines running BASIC. The first computer I ever had at home was the very simple Acorn System 1 which had just 1K of RAM, a hexadecimal keypad and LED display and was programmed in 6502 Assembly language. Curiously, although I have great difficulty remembering my own phone number, I can still remember quite a lot of the hexadecimal opcodes in the 6502 instruction set!

The Acorn System 1 went into production in 1979 but just a year later Sinclair introduced the ZX80. Although very limited by today’s standards, it was really much more advanced than the machine I had. It did, however, have a reputation for unreliability and it was actually quite difficult to get hold of one due to supply issues. A friend at school bought one, but it seemed to me flimsy and awkward to use, so I never bought one. Nor did I buy the successor the ZX81.

Because I had experience using machines based on the 6502 processor I thought I would buy a BBC micro when they came out as I used to enjoy bypassing the BASIC interpreter on the Commodore PET and running my own machine code. In 1982, however, Sinclair released the ZX Spectrum. This again was very limited by today’s standards but was a significant improvement on its predecessors, so I bought one. I took it with me to Cambridge when I began as a student there in 1982.

I remember also buying various peripherals for it, including a dreadful printer that required rolls of special paper.

The ZX Spectrum was a great success but soon other companies took over the market. It seemed to be in Sinclair’s character to invent things and then lose interest and he subsequently switched his attention to other inventions, many of which flopped, such as the ridiculously impractical Sinclair C5 which launched in 1985 and sank shortly afterwards. He never seemed to let such failures bother him too much, though, which is to his credit, and he didn’t seem to mind being ribbed about them either. Here he is on Clive Anderson Talks Back:

Despite his failures it seems very clear to me that Clive Sinclair was a pioneer in the technological revolution who played a major role in shaping the digital landscape in which we find ourselves today, forty years after the first home computers. My washing machine has much more CPU power than any of the 1980s home computers, but you have to start somewhere.

Rest in Peace, Clive Sinclair (1940-2021).