Sinclair ZX80 / ZX81 Forums

EightyOne doesn't currently have a green screen mode.

So you would like black text on a green background?

If you have updated from a much older version of EightyOne then you will need to delete the EightyOne.ini file saved by the previous version, which is located in a hidden folder under your user account name. When you next run the emulator it will create a new ini file, but now of the correct format....

The operation of the DDC colour interface is described here on the forum. It doesn't sound a very flexible mechanism. I was on the verge of buying one back in the day as the idea of adding colour to the ZX81 sounded incredible but I never did in the end. The DDC interface certainly wouldn't have all...

Hi Jessica

Should you visit these forums again, I've sent you a private message which you'll need to log in to access.

RobertK wrote: ↑

Wed Oct 24, 2018 3:09 pm

Fruitcake: do you think you can patch the ZX81x2 ROM for the Chroma Interface to allow loading programs via RS232?

I'll add it to my TO DO list.

The inlay for the game says: Tempest.gif And this thread provides some details on how the Mikrogen joystick interface is read: https://www.sinclairzxworld.com/viewtopic.php?t=860#p8527 Why I try the game with and without Chroma in EightyOne, both show "PRESS ANY KEY" so Chroma is not conflicting wit...

I managed to load the file and run it, but the game screen remains static. However, pressing BREAK returns to BASIC and so it isn't crashing. Placing a breakpoint at 18823 shows that the machine code is being run at the correct entry point and it does go through the motions of regularly checking the...

I've managed to reproduce the issue you reported using the EightyOne emulator by setting the Chr$ Generator setting in the Hardware dialog to dk'tronics instead of CHR$16 . Even with CHR$16 mode selected, the same issue is seen if the output format selected in CPEC is 8K-64 ; it needs to be 8K-128 ....

I've tried the files again and I don't see the issue you describe. Are you testing in an emulator or real hardware? If an emulator then which one?

I just tried the SPONZY ROM via a ZXC4 ROM cartridge plugged into a Chroma interface and it worked remarkably well. After a bit of trial and error with volume levels I managed to load the Spectrum game Flippit (Sinclair Research Ltd, G26/S) via cassette! Great stuff!!