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Someone figured out how to make an emoji character double as actual runnable code.

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Did you know emojis can be executables? Well, they are if you treat them like Intel 8088 or 8086 machine code, anyway. [GloriousCow] shared this clever revelation, demonstrating that executable …read more

Did you know emojis can be executables? Well, they are if you treat them like Intel 8088 or 8086 machine code, anyway. [GloriousCow] shared this clever revelation, demonstrating that executable pro…

Did you know emojis can be executables? Well, they are if you treat them like Intel 8088 or 8086 machine code, anyway. [GloriousCow] shared this clever revelation, demonstrating that executable programs could be created entirely from emojis. To really appreciate why, it’s necessary to take a small step back. It all started when [GloriousCow] happened to notice, entirely by chance, that 🐐 (the goat emoji) was `F0 9F 90 90`. Anyone familiar with x86 assembly language probably recognizes `90h` as `nop`, or null operation, or “spend a cycle doing nothing”. What about `F0` and `9F`? Together they are `lock lahf` (assert the bus lock signal then copy some status flags into register AH) which, on an 8088 and 8086, essentially does nothing. This means the goat emoji (`F0 9F 90 90`) is 100% technically valid machine code. It doesn’t _do_ anything, but here’s where it gets even more interesting. A short string of emojis is machine code that writes HELLO (lower right) by writing directly to video memory. There are loads of emojis, and many of them start with `F0 9F` followed by two more bytes, and many of those other two-byte combinations are surely also valid machine code. Could one create a meaningful executable program consisting entirely of emojis? The answer is yes, and [GloriousCow] crafted a simple Hello World program to demonstrate. The simple program looks like this: 🐸☺️🐰🐎♐🗃️🧯🧯🧯🐮💗🦮🪏♐🐰🐹🗃️🧯🧯🧯🧯💗🪗🧯😗🧮🫪😗🧮😗🐮😪😔⭐. Save that string of emojis to a file, give it a `.com` extension, and run it in DOSBox with CPU type set to 8086. It’ll print HELLO at the bottom-right of the screen by writing directly to video memory. There are loads more details on the original blog post, including plenty of resources and tips for writing your own executables with emojis. There’s also a much more involved VGA demo program made from emojis, so give it a look. Some of you may be aware that ASCII characters can also be used in a similar way (and more flexibly, since they are not four-byte combinations like emojis). This was used in BASIC programs as a way to cleverly embed machine code in things like REM statements, creating odd-looking code that did things in BASIC that shouldn’t have been possible.

Did you know emojis can be executables? Well, they are if you treat them like Intel 8088 or 8086 machine code, anyway. [GloriousCow] shared this clever revelation, demonstrating that executable programs could be created entirely from emojis. To really appreciate why, it’s necessary to take a small step back. It all started when [GloriousCow] happened to notice, entirely by chance, that 🐐 (the goat emoji) was `F0 9F 90 90`. Anyone familiar with x86 assembly language probably recognizes `90h` as `nop`, or null operation, or “spend a cycle doing nothing”. What about `F0` and `9F`? Together they are `lock lahf` (assert the bus lock signal then copy some status flags into register AH) which, on an 8088 and 8086, essentially does nothing. This means the goat emoji (`F0 9F 90 90`) is 100% technically valid machine code. It doesn’t _do_ anything, but here’s where it gets even more interesting. A short string of emojis is machine code that writes HELLO (lower right) by writing directly to video memory. There are loads of emojis, and many of them start with `F0 9F` followed by two more bytes, and many of those other two-byte combinations are surely also valid machine code. Could one create a meaningful executable program consisting entirely of emojis? The answer is yes, and [GloriousCow] crafted a simple Hello World program to demonstrate. The simple program looks like this: 🐸☺️🐰🐎♐🗃️🧯🧯🧯🐮💗🦮🪏♐🐰🐹🗃️🧯🧯🧯🧯💗🪗🧯😗🧮🫪😗🧮😗🐮😪😔⭐. Save that string of emojis to a file, give it a `.com` extension, and run it in DOSBox with CPU type set to 8086. It’ll print HELLO at the bottom-right of the screen by writing directly to video memory. There are loads more details on the original blog post, including plenty of resources and tips for writing your own executables with emojis. There’s also a much more involved VGA demo program made from emojis, so give it a look. Some of you may be aware that ASCII characters can also be used in a similar way (and more flexibly, since they are not four-byte combinations like emojis). This was used in BASIC programs as a way to cleverly embed machine code in things like REM statements, creating odd-looking code that did things in BASIC that shouldn’t have been possible.

Did you know emojis can be executables? Well, they are if you treat them like Intel 8088 or 8086 machine code, anyway. [GloriousCow] shared this clever revelation, demonstrating that executable …read more

Did you know emojis can be executables? Well, they are if you treat them like Intel 8088 or 8086 machine code, anyway. [GloriousCow] shared this clever revelation, demonstrating that executable …read more