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The 80186 won't be able to play many games that you remember... it wasn't really PC compatible.

The 80186 was completely compatible to its predecessor. It's just that there weren't many IBM-compatible PCs which featured an 80186.

The core was compatible, but it came with built-in non-standard peripherals. It had a DMA controller, interrupt controller, and timer. None of these were PC compatible.

This particular one sounds like it has all of these, seeing how the webpage shows it running a bunch of DOS games.

I think he only duplicated the 80186 core (which itself was a bit different from the 8086 core and had a few more instructions), without adding the peripherals that came on-die on an actual 80186.

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