Sinclair ZX80 / ZX81 / Z88 Forums

Parents, they knew us better than ourselves.

This is a trick me and my cousin discovered back in those days, I had to fiddle with the ZX Spectrum emulator. There are several ways to get to the same result, this one looks reasonably readable. The trick relies on two very powerful features we have on the ZX Spectrum, DEF FN() and VAL. DEF FN is,...

This is an equivalent function library generated with z88dk.

https://www.sinclairzxworld.com/viewtop ... 79e8ab2561

More memory consuming but probably faster and less dependent from the ROM version because it is accessing to the video memory directly.

In my information a this is the smallest disassembler ever:
https://github.com/z88dk/z88dk/blob/mas ... disz80.asm

Scroll a little lower to get to the core routine, the extra stuff is something I've put to have a C function.

Death Star, keys QAOP, M (toggle blocker/ball), G (exit), H (restart level)
To invert the phase press '1'

The cos(x*x+y*y) 3d function drawn with the zbuffer algorithm. press 'P' to invert the phase (keep it pressed until the phase gets inverted).

Yet another demo program.
When the picture is drawn, pressing 'P' will eventually correct the phase.

I'm sorry but I'm even more confused now.
How does the TV know if it is the even or the odd frame being transmitted?

probably I'll find the answer in the program you've published

Wow, on the photo it looks fantastic compared to the standard rez on the right ! It is probably flickery, but it is worth the effort of a specific library. @nollkolltroll, I'll look at your code. How did you address the phase issue? EDIT: I must apologise, I totally forgot about that post. Are the t...

test_wrxi_3.p New version. I tried to mockup a theorical high resolution face symbol. I also removed the blurred picture, it now shows the flickering/ghosting picture (almost the worst case scenario of a single frame in use). It is good to know that on some LCD display the picture is reasonably sta...