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Asked: 2026-05-20T17:50:16+00:00

The answer provided here is a pretty awesome trick. Just for my own edification,

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The answer provided here is a pretty awesome trick. Just for my own edification, I’d like to learn to create that type of program.

Is there a nice library that I can use to ensure my output is entirely ASCII? Or what tools would I begin to use to generate that type of output? I understand that I would likely be creating a 16-bit application, but can I generate 32-bit applications as well?

I’ve found MSFT’s debug.exe program has an assembler that works with this, but the output I receive from that is not entirely ASCII. Also, when disassembling the program provided in 谢继雷’Lenik’s answer I don’t see where he calls int 21 to write to the screen. Is there more documentation somewhere for this type of program?

Can anyone else me sort out these mysteries, please?

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1 Answer

  1. Editorial Team

    The text-to-com file is a very neat trick. It takes advantage of the fact that the 16-bit loader will load the image at offset 0x0100 and start executing at that address.

    An exe file includes a binary header that cannot be represented as text. As a result, you can’t create a 32-bit or 64-bit executable that is strictly text.

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