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I decided to take a few steps back and decided to create a 80188 CPU computer instead

I also can't find a serial interface on the 80188.

I forgot about the 'enhanced' product line. Good spot there...

Dave
 
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Some but not all 80186/80188 chips have an onboard UART. For example, the very common 80C188EB has two of them. The original 80188, however, does not.
 
I just thought they all had it. It was with the RIM and SIM instructions as I recall. That could be wrong as well, after all I tend to have brain fade.
Dwight
 
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