Latest updates

256: 0 To 255

Sunday, 12 September 2021

From 0 supporters to 255 of them in less than two months - what an amazing thing you've all done to help raise the profile of retrocomputing even further!

As most of you will know 8-bit machines can stored 256 distinct values, usually numbered 0 to 255. (Although this range can also be interpreted as -128 to 127, but we'll cover that in the book.) For this update, I'll merely point out that an…

205.5 : It's not just about integers

Wednesday, 1 September 2021

This number is halfway between the number of supporters I had when I started to write this, and the number I had when finishing it! It is rather an amusing number, as it forms the foundation of the (in)famous Commodore 64 BASIC program:

10 PRINT CHR$(205.5+RND(1));

20 GOTO 10

This prints a random stream of  and  graphical characters which ultimately form a maze, scrolling up the screen.

30% - This is the Future!

Thursday, 19 August 2021

When we hit 25% I started to make notes for an exclusive update about the number 30. Then I blinked. We hit a Dragon-roaring 32% almost overnight! You folk are epic!

Anyway, so what did I want to say about the number 30? Simply that many of us will know it primarily as an address in Bath. Specifically, 30 Monmouth Street. This is etched in my mind as being the place where Future Publishing were…

That's 100 (in decimal!)

Wednesday, 4 August 2021

We are now in triple digits - more than the number of dots on the Acorn owl logo from the BBC Micro!

Wow - thank you all so much.

Please pass on the link so others can join us -

https://unbound.com/books/20goto10/

#retro #80s #8bit #retrogaming #retrocomputing #20goto10

81 supporters - can we make 100?

Thursday, 29 July 2021

It's been a fantastic start to the campaign, so could anyone that hasn't posted/tweeted/shared or otherwise mentioned the book please do so, as I'd love to reach 100 supporters by Friday!

Even though this means I lose the magic number 81 from my supporter count!

It was the ZX81, after all, that got me my start in computing. Its name is a logical continuation of Sinclair's previous machine, the…

42 supporters!

Tuesday, 27 July 2021

This number is probably the most recognisable integer in all of geekdom - all thanks to Douglas Adams.

But 42, as well as being the answer to the meaning of life is also the ASCII for '*' - which, aptly, is used as the wildcard symbol meaning 'everything'

(It's also 6 x 9 in base 13, XLII in roman numerals, and 101010 in binary, but all are less significant)

 

W00t! We hit double figures!

Monday, 26 July 2021

That's 10 people! 10. Not only the number '2' in binary (base 2), but the function key labelled as 'BREAK' on the Acorn BBC Micro which did a soft reset.

At school, we would re-program the break key to recover the previous program in memory, and re-run it. Like this:

*key10 OLD||M RUN||M

What did you do with the break key?

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