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get zmachine.ps and you could play zork i-iii, Tristam Island and tons of z3 zmachine games (search for calypso.z3 too) without cheating as the PDF format implements an ad-hoc JS interpreter where not all viewers parse it.

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billforsternz

9 hours ago

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I thought my Z80 project (https://github.com/billforsternz/retro-sargon) was close to the whimsical end of the practical to just for fun spectrum but this takes things to a whole new level, kudos.

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ilaksh

12 hours ago

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I guess it would be cheating, but he actually could have just written it in Rust, since OpenType can execute web assembly. People have abused that to embed things like Tetris and even an LLM inside of fonts.

What he did was more impressive in a way.

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erk__

3 hours ago

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It's not OpenType that can execute wasm it's a experimental extension in HarfBuzz so compared to this it does not work online since it is not enabled for the HarfBuzz builds in Chrome or Firefox. Which makes this more cool to show of online.

(disclaimer, I made the Tetris font)

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tgv

12 hours ago

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This made me smile. What an astonishing combination. The oddball application of a font as a disassembler works like a wonderful practical joke to me. Merging parsing, processing and rendering into a single step feels mad genius.

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notglossy

12 hours ago

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Man... I'm lucky if the fonts I'm using even have tabular figures as alternates. This is on a whole other level.

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userbinator

12 hours ago

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Not too surprising given that a font maps bytes into glyphs, and an instruction set maps them to instructions. I suspect a 6502 or 8051 version would be much simpler.

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dhosek

11 hours ago

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Definitely. I wrote an incomplete z80 disassembler as a high school student back in the 80s, but never got to the 2-byte opcodes. 6502 has none of those so would be much easier to manage.

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iberator

11 hours ago

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Ha ha this is the best thing I have seen today in hacker news!

So clever and funny