Sinclair ZX80 / ZX81 / Z88 Forums

Hello and welcome :-) All the circuitry for an unexpanded TS1000/ZX81 runs off the +5V DC supply from the 7805 voltage regulator. This in turn is supplied by the (nominal) +9V DC input. A unexpanded TS1000/ZX81 should work if the input supply has a voltage of between 8V to 15V (see note #1 below) a...

My Timex Sinclair 1000 previously displayed a rolling screen. I switched the power supply to an Atari 2600 power supply and got a crystal clear image with the K (shielded RF cable). As soon as I pressed a key the screen went black with columns of white dashes. Trying again and also with a newer Atar...

Very cool 1K games. I was amazed by Qbert in 1K, awesome gameplay and fantastic port! I also liked the Defender type game, would love to see you create a 16K version of Defender and can't wait to see the new Pacman game you are working on! :) The pacman game is already available for some time. Than...

Hello to you all.... I notice that my games are downloaded A LOT, all for free, b ut I asked for a nice review of the games which, besides the hilaric videos of Rod Bell seems to stay away. Since Rod did not review all the games I am starting this simple review topic. You pick a game from the 60 1K...

mrtinb wrote: ↑Tue Jun 15, 2021 3:00 pm You need to use the Windows program to find which patterns are possible.

Thank you I will check out the programming toolkit, I've been reading more about the graphics driver on the site.

Yes Sinclair BASIC was really well tailored to the machine and had more advanced features for programming and error detection compared to the C64. The Atari 400/800 had similar ability to detect programming errors in a line as you typed it in also. Few other contemporary micros had that functionalit...

On the same home page, you can find the Celebration Demo . On this page your can download the Lightning Pseudo Hires Driver Source. With this source you can use many of the same tricks from the games. Try it out. This Psuedo hires mode looks fantastic! From the Celebration Demo page: I'm interested...

A lot has been written about the ZX-81 introducing people to programming and computers. Home Computers were an extension of the Dartmouth BASIC experiment going beyond the academic curriculum to teach programming to the general population. The ZX-80 and ZX-81 machines have amazing manuals that are a...

I remember I was about 9 years old when I got my first computer, a Timex Sinclair 1000 with a 16K RAMpack, which turned out to be really dodgy. I taught myself Basic by typing in programs from books and listings from magazines. I enjoyed playing games on it, getting really annoyed when the RAMpack ...