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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Joined: Sat May 10, 2008 4:23 pm

How to compress a ZX81's screen [french]

Post by XavSnap »

Hi all,

Sorry, this tread is in french!
:mrgreen:

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

Have Fun!
Xavier

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

Post by sirmorris »

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 »

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

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

Post by GCHarder »

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 8531 times
Attachments
Compress Display.zip
Modified encoder
(9.71 KiB) Downloaded 140 times

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

Post by XavSnap »

Great job GCHarder !
:ugeek:
Xavier

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

Post by dr beep »

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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