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Let's see 8088mph run on that baby.

Okay: https://www.youtube.com/watch?v=b3GkPGZR4BU

Looks like it mostly works, with the exception of a couple of tricky color effects (which have nothing to do with the CPU, and might depend on some composite video tricks).

In particular, the Kefrens bars at 4:42 render completely wrong.

Looks like the demo leans on a lot of idiosyncrasies of specific CGA cards: https://scalibq.wordpress.com/2015/08/02/8088-mph-the-final-...

The Kefrens bars effect is the part of 8088 MPH that is most sensitive to the instructions being a cycle faster or slower here or there. The MCL86 doesn't claim to have perfect emulation of timing, so I would not necessarily expect this effect to work reliably on it.

The artifact colours are quite off as well, so I suspect the card used was not a real IBM CGA card. On my ATi Small Wonder and Paradise PVC4 cards, I get the exact same Kefrens bars, with the top chopped off.

Having said that, the fact that the music slows down noticeable during the moire-effect seems to indicate that indeed some instructions are a few cycles off here and there.

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