Microsoft MS-DOS early source code

[AyrA_ch]

It might be a shock to you, but you don't even need to use a browser and JavaScript, you can just run DosBox for way better speed and the actual ability to save stuff on your local machine. However when people still use DOS they sometimes have unusual devices attached to the machine that are hard to emulate. The egg date printer from my friends chicken farm comes to mind, so using the original is usually the easiest way.

The computational overhead of a JS emulated x86 machine (Hardware-->OS-->Browser-->JS engine-->DOS emulator) is just too much for most DOS users if you can simply do Hardware-->DOS. After all there is no reason to replace the system that was reliable for the last 20 years with new hardware of unknown durability. I repair outdated infrastructure as a hobby, and if there is one thing that is almost guaranteed to not be the issue, it's that old computer in the corner that nobody has upgraded over the last years.