|
There Are No Limits by Noice [web]
[nfo]
|
||||||||
|---|---|---|---|---|---|---|---|---|
|
|
|||||||
|
popularity : 60% |
|||||||
alltime top: #4674 |
|
|||||||
|
||||||||
added on the 2009-12-20 12:05:51 by Sdw  |
||||||||
popularity helper
comments
n0ice
delivers!
Totally incredible work! Many thanx for Your effort.
Keep the ZX81 alive!!!!
Keep the ZX81 alive!!!!
!
tnx shadow :)
that twister looks totally like chrome :)
superb work once again !
that twister looks totally like chrome :)
superb work once again !
nice effect(s)!
nice one
Given that the machine seems to be completely hopeless to code for, this is pretty awesome :)
WOW
Nice twister!
Fucking wow!!
nice
looks good
Nice exploration :)
Video is nice nice :)
Now I wonder if it's possible to run this on the NTSC zx-81 [aka the timex sinclair 1000]. Shall give that a shot
Now I wonder if it's possible to run this on the NTSC zx-81 [aka the timex sinclair 1000]. Shall give that a shot
Yeah Greaaaaaaaaaaaaaat !!
i was a proud owner of that machine a long time ago
and i can't believe what i see .
simply Incredible
i was a proud owner of that machine a long time ago
and i can't believe what i see .
simply Incredible
whoah!
btw that is one keyboard i do not miss ;)
btw that is one keyboard i do not miss ;)
micksam7: it should work without problems.
I actually doubt that it would run correctly on an NTSC machines, as they have quite a bit less cycles available in the non-display area.
super
yep!
That's quite impressive.
Sdw: yes, You're right, it loses synchro on the bottom of the screen on Timex Sinclair 1000 but still the errors are not very visible and it still looks OK. Especially that ZX81/TS users will be happy to have any new demo at all, heheh. :)
It really looks not bad.
It really looks not bad.
nice
Actually, it looks rather excellent on a timex 1000 :) A few errors here and there, but only at the end of each effect, it also runs about half the speed but still is more than watchable.
kewl
As usual :) Sdw's 1st fan !
yet again...excellent!
Nice but a bit repetitive...
Actually it isn't repetitive - it's simply looped. And it's very good, as the computer has no sound by itself.
I wouldn't have believed that was possible. Great stuff.
I have absolutelly no idea how is it done, but it rules for sure!
great stuff :)
well done
Hi SDW, this is absolutely nice. How the heck did you do this. I remember my ZX 81 (I soldered it together myself - also the reason why it died years later ;-) could read charset data only from the ROM, but also the CPU was involved somehow. Seems you managed to override what the CPU does. Great job!
rulez
Thumb for your work and micksam7's test aswell :)
JAC: You're correct that on the ZX81 the CPU is responsible for outputting the gfx aswell, meaning that as soon as you have something onscreen, the CPU is occupied by that, so once you have gfx on the screen, the only available CPU time is in the blank area below and above the screen.
You're also correct that the ZX81 can only display ROM (unless you solder in some mods = cheating). But by selecting the right ROM area, and overriding the video-output routine with your own code that fetches a new char every rasterline routine you can get a 256x192 pixels pseudo-hires mode. That has been known since the early days of the ZX81.
However, trying to update 32x192 bytes every frame when the only free cpu time is in the border is not doable of course.
The new invention (wohoo, I always wanted to do a world-first!) in this demo is that with some more trickery I get a mode where I can pick from predefined 256x1 pixels lines, and thus only need to update 192 bytes per frame to get these effects running full framerate.
You're also correct that the ZX81 can only display ROM (unless you solder in some mods = cheating). But by selecting the right ROM area, and overriding the video-output routine with your own code that fetches a new char every rasterline routine you can get a 256x192 pixels pseudo-hires mode. That has been known since the early days of the ZX81.
However, trying to update 32x192 bytes every frame when the only free cpu time is in the border is not doable of course.
The new invention (wohoo, I always wanted to do a world-first!) in this demo is that with some more trickery I get a mode where I can pick from predefined 256x1 pixels lines, and thus only need to update 192 bytes per frame to get these effects running full framerate.
whreee
aw yeah.
Impressive stuff for ZX81, cant wait to learn those hax!
great!
submit changes
if this prod is a fake, some info is false or the download link is broken,
do not post about it in the comments, it will get lost.
instead, click here !
YouTube video captured from real hardware.