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Postcard demos?

category: general [glöplog]
 
Folks, could you please share with me some demos you know that would survive being snail-mailed on a printed postcard (via QR code, "tweetcode" style PICO8 code, or a different method I don't know yet) or are specifically designed to be mailed this way?

I'm thinking of assembling a list for these - I recall getting a postcard with a demo during one of the Christmas Card Exchanges, and I was really awed by it. (Can't recall which one, sadly, since my postcard archive is currently elsewhere.)

Thanks in advance for enlightening an ignorant newbie!
Anything <=1kB could be encoded as a QR-Code, just do it.
The more interesting question is how you then get that data from your phone to the destination device.
added on the 2026-05-28 11:46:11 by hfr hfr
Quote:
Anything <=1kB could be encoded as a QR-Code, just do it.
The more interesting question is how you then get that data from your phone to the destination device.


And once someone's built a tool for "QR-code to Amiga adf" you might just as well let the QR contain a link and then we're back to downloading arbitrarily-sized files.
Quote:
The more interesting question is how you then get that data from your phone to the destination device.

I guess many here are old enough to remember typing in long series of hex bytes (or lines of BASIC) from a magazine…

DATA ERROR BETWEEN LINES 10200 AND 10800
added on the 2026-05-28 12:07:16 by Sesse Sesse
Quote:
let the QR contain a link and then we're back to downloading arbitrarily-sized files.

I somehow like the idea of a completely self-contained piece.
Preferably solid enough to weather the rough times we have.

Quote:
DATA ERROR BETWEEN LINES 10200 AND 10800

You better type in the checksummer first! ;)
From today's perspective a hex listing wouldn't be far off from a QR code...
added on the 2026-05-28 12:31:58 by hfr hfr
Technically, a "pop-up book" style postcard would be fully self-contained without requiring any power...

(compiling it would be a pita, though)
how about hand-written glsl shader or asm code?
added on the 2026-05-28 14:28:14 by 100bit 100bit
AH ! FINALLY ! SHAAAAADERS ! :D ... I was getting worried.
There's nothing more demoish and display-hacky than 300 chars golfed into pure, rock-solid logos !
added on the 2026-05-28 14:41:14 by TomS4wy3R TomS4wy3R
Check these aliases on Shadertoy for examples :
Xor, mrange, diatribes, FabriceNeyret2, GregRostami, and maaaaany others.
added on the 2026-05-28 14:46:03 by TomS4wy3R TomS4wy3R
Will do! Thank you, Tom & 100bit! Really glad I decided to ask.

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