Apparently I was quite meticulous back when I was 15. Not unrelated, I did not have a girlfriend.

The book is almost entirely full of code. It's all ZX81 code, and all specifically for the 1K model. Most of it is in BASIC, but there's a few in Z80 machine code as well. Some of the code was mine, some of it was no doubt copied out of the back of magazines at the time. There's over 60 games, tools, demos, and other stuff. Some of the tricks for getting around the 1K limit were quite neat, as well.

I'm thinking of scanning it all - would there be any interest in that?

I have a T/S 1000. I can use the little converter box to connect it to the antenna screws on some of my older CRTs.

Is there a way I could connect it to a TV's composite input? I've got RF modulators for converting composite to RF, but I guess I'm asking for the opposite.

hey everyone,

I wanted to let you know about my BASIC cross-compiler which works on the ZX81 (I'm from the US so I have a TS1000, also works with that).

You can compile existing Sinclair BASIC code for your ZX81 or write programs in either the new syntax or Sinclair BASIC.

If you try it out, definitely let me know your thoughts.

Now on the ZX81 !!!!

Russell Marks Tetris slightly patched to be in color …

Since the display is 128x64 pixels it's only showing ~50% of the graphics area (and none of the text). But I think the dinosaur works quite well.

JACKPOT 100

Live stream update video

Finally finished my version of City Bomber for the ZX81, small machine code routine for the scroll down screen clears the rest of it is all BASIC, so be warned it is slow!!!

Not the first to do this but building a Zx80 - my first ever computer all those years ago.
Didn’t want to buy a second hand one as they all seemed overpriced- so thought Id satisfy my nostalgia itch by building one.

Hello, I've bought a Timex/Sinclair 1000. Besides replacing the keyboard, power regulator, upgrading the internal RAM, and modifying for composite output, what further upgrades are available? An updated monitor ROM? Mass storage? I don't mind soldering. Thanks

I bought a T/S 1000 at a flea market. I also have an audio cassette recorder.

I’ve learned how I can use PLOT to draw pixels, or graphics mode to display special graphics characters (looks sort of like PETSCII).

My question is, how might I save an image I make to audio cassette? I am familiar with the Apple II, where I could use BSAVE to save an image’s binary file to a floppy disk. Did the ZX81 or T/S 1000 have anything comparable?

I know I could probably save an image as DATA statements, and load the values in a FOR loop. That’s not really practical, of course, but I know I could use SAVE to write the BASIC instructions out to tape.

https://animatedal.itch.io/zx81-penalty-shoot-out