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It's MS-DOS time again. And yes, this topic has rather less or even nothing in common with our 8 bit systems. Only the timeframe of their significance has a certain intersection. But for the following exactly this circumstance should be sufficient.

Who did not take the MS-DOS road into the modern age? 🙋‍♂️

And who can still remember the difference between "Real Mode" and the "Protected Mode" introduced with the 286? Well? I don't see any hands up.

Gustavo Pezzi alas @pikuma still remembered, and addresses this very delta in his latest article.

And by the way, one learns how a CPU with only 8 bit wide address bus could access 1MB RAM at all. And what happened to DMA? And what-the-lavender is a DOS Extender?

These are all questions that should be answered during your lifetime, otherwise you won't rest in peace. And: Gustavo.Clarifies.Everything.

In - as always - a competent and entertaining way. Nice read.