Sinclair ZX80 / ZX81 Forums

Found this on YouTube. https://youtu.be/KX0X-Q9Ycu4

New game: Life of Pixel

The first part of the game is in ZX81 mode.

OFF-topic but cool

This Danish book store still has ribbons for it. But the picture of the ribbon is quite huge compared to the size of the printer.

https://www.williamdam.dk/printertilbeh ... d=Sinclair

The K1 site has a picture:

My old soldering iron was not easy on any boards

And now a monitor is connected and M1NOT modification added temporarily with the white jumper wire

Finally I got my ZX81 from Danish distributor to work again with Andy Rea's new ULA. :D :D :D I found a second cut on the pcb from the destructive removal of the old ULA. So now there's 2 wires on the bottom of the pcb, and it works great, and a new transistor has been inserted where one was removed...

The PIC18F4525 that the ZXpand uses has a EUSART. I think that's what's used.

RS232 communication is not as simple as you might think. RS232 requires a steady baudrate. This is easy on the PC side where you have a chipset with hardware handshake and interrupts. Hardware handshakes are not available on the ZX81, so we have to use software handshake (XON/XOFF). And the interrup...

Yes indeed. Very pleasantly surprised. Seems Scan-Bit Software released both great and poor games.

This must be the game Squeeze Play which cover was shown earlier. Now with the instructions there are more features than I just found. https://trello-attachments.s3.amazonaws.com/598af660300e0d55b35f5755/5a36e7929ce3cfa9702728e9/827ec273a9b41a2652deb018109b75ef/scanbiy18.png Translation: -----------...