How to compress a ZX81's screen [french]

Anything Sinclair ZX Basic related; history, development, tips - differences between BASIC on the ZX80 and ZX81
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XavSnap
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How to compress a ZX81's screen [french]

Post by XavSnap » Sat Feb 07, 2015 7:07 pm

Hi all,

Sorry, this tread is in french!
:mrgreen:

http://forum.system-cfg.com/viewtopic.p ... x81#p93467

Have Fun!

sirmorris
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Re: How to compress a ZX81's screen [french]

Post by sirmorris » Sat Feb 07, 2015 7:43 pm

Google translate makes it understandable. Thanks Xav!

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XavSnap
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Re: How to compress a ZX81's screen [french]

Post by XavSnap » Sat Feb 07, 2015 8:49 pm

:D
I will try to make an English release !
(less googled)

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GCHarder
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Re: How to compress a ZX81's screen [french]

Post by GCHarder » Fri Oct 09, 2015 9:33 pm

Unfortunately, there's a bug in the encoder program, see the attached image. I've attached a modified version which fixes it. These are really great routines, I've created some videos using them and in some cases I've been able to get up to 150 screens to fit in 16K, of course it all depends on the complexity of the screens.

Regards;

Greg
Screen shots showing bug
Screen shots showing bug
Encoder Bug.jpg (44.12 KiB) Viewed 7243 times
Attachments
Compress Display.zip
Modified encoder
(9.71 KiB) Downloaded 115 times

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XavSnap
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Re: How to compress a ZX81's screen [french]

Post by XavSnap » Fri Apr 01, 2016 2:32 pm

Great job GCHarder !
:ugeek:

dr beep
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Re: How to compress a ZX81's screen [french]

Post by dr beep » Fri Apr 01, 2016 3:35 pm

A bit like my 16K mutitasking for the ZX Spectrum http://www.worldofspectrum.org/infoseek ... $&pub=^YRS$

Or the entire motor in 48K animated.
http://www.worldofspectrum.org/infoseek ... id=0016650

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