Sinclair ZX80 / ZX81 Forums

The documentation for the Chroma interface is here . There are no extra BASIC commands. Some of the Chroma interface functionality is via Z80 CPU IN or OUT instructions (I/O ports). There are no BASIC equivalents, so this has to be done in machine code. As far as the colour display system is concer...

also, how do I access color commands for the chroma add on (EightyOne)

Shaun_B wrote: ↑

Sun Nov 18, 2018 11:16 am

The biggest difference, of course, is that the ZX81 ROM is 8K whereas the BASIC Kernal on the Commodore VIC-20 is 16k, therefore Commodore BASIC was more verbose.

Regards,

Shaun.

verbose how?

looks like I need a new version

it's cool. feel free to expand on it, my work on it is done but make sure to give me proper credit, k?

what about the default mode when it boots up?

I'll check the download later good sir, having thanksgiving in a bit. Enjoy your day

is it common for the screen to blink when you're typing on the zx81?

how did you manage to get Color on the zx81, when it doesn't even support it, not to mention the enemy sprites and the maze? is it machine code?

XavSnap wrote: ↑

Wed Nov 21, 2018 9:31 am

sorry for that, I might fix it, I might not, depends

Sorry for that too, we might help you, we might not, depends

i'll see what I can do