Stopbit

The DUART TL16c2752 is supposed to be a rather big upgrade to the Steckschwein “core”. Now two serial interfaces, with 64 byte FIFOs each, instead of only one interface with 16 byte FIFOs. Oh, the possibilities. Using one line to explore UART interrupt handling while still having another one to upload code. Cool!

With the 16C2752 being a part of the 16C550 family, we did expect it to be a simple drop in replacement for the latter one. As we all know, happiness is reality minus expectation, and oh boy did things get dreadful!