Hi,
Is there any way to PLOT to the screen quickly with a nice bit of assembly? Or is this simply not possible on the ZX81?
Regards,
Shaun
Fast PLOT routine
Re: Fast PLOT routine
You might use HRG-ms from Matthias Swatosch.
This supports full HRG and a nice driver bib with functions to plot and unplug and more.
Easy to use and compatible with ZXmore as well.
http://www.swatosch.de/zx81/
This supports full HRG and a nice driver bib with functions to plot and unplug and more.
Easy to use and compatible with ZXmore as well.
http://www.swatosch.de/zx81/
Re: Fast PLOT routine
Define PLOT.
Zx81 pixels (4x4) or 1x1 hires.
It is possible to use scanning for parameters.
Assume fullscreen or not. Fullscreen is faster
Zx81 pixels (4x4) or 1x1 hires.
It is possible to use scanning for parameters.
Assume fullscreen or not. Fullscreen is faster
Re: Fast PLOT routine
Hi Dr Beep,
I was thinking of ZX81 pixels only for now, not high resolution.
Regards,
Shaun
I was thinking of ZX81 pixels only for now, not high resolution.
Regards,
Shaun
Re: Fast PLOT routine
Hi,
Yes, Shaun_B ... the internal "PLOT" routine in the ROM is ...
It slow down all ASM code how using this ROM routine.
Big letters:
http://www.hebdogiciel.free.fr/hd-roms/ ... uslong.zip
http://zx81.ordi5.free.fr/programmes/Big%20Letters.zip
...???
Is there a code to fill a part of the screen? (never seen kind of routine!)
Yes, Shaun_B ... the internal "PLOT" routine in the ROM is ...
It slow down all ASM code how using this ROM routine.
Big letters:
http://www.hebdogiciel.free.fr/hd-roms/ ... uslong.zip
http://zx81.ordi5.free.fr/programmes/Big%20Letters.zip
...???
Is there a code to fill a part of the screen? (never seen kind of routine!)
Xavier ...on the Facebook groupe : "Zx81 France"(fr)
Re: Fast PLOT routine
Hi,
I just want some examples of somehow doing fast PLOTing to the screen so I can mess about. Fill, point-to-point and other drawing primitives will come later on if I get that far. Just for fun.
Thanks,
Shaun.
I just want some examples of somehow doing fast PLOTing to the screen so I can mess about. Fill, point-to-point and other drawing primitives will come later on if I get that far. Just for fun.
Thanks,
Shaun.
Re: Fast PLOT routine
Did you see my "Rapid Plot" post in the BASIC forum?
http://sinclairzxworld.com/viewtopic.ph ... lot#p15004
It might give you some ideas.
Regards;
Greg
http://sinclairzxworld.com/viewtopic.ph ... lot#p15004
It might give you some ideas.
Regards;
Greg
Re: Fast PLOT routine
I could write a lot on this subject, as many of my ZX81 games - especially ZXagon - need to do this. I’m pretty sure I could write a faster routine than the one mentioned here, but the real trick is to not do it from BASIC, so you can use a custom back buffer format which suits the kind of graphics you need to display.