8080 -> 8086 not compatible although assembly code translation was possible.

Some parts of the lineage are nevertheless very important. When I wrote a 8086 assembler, I’ve come across the idea of of writing the instruction encodings in octal instead of hexadecimal purely by accident, described as some sort of little-known neat trick hidden from the casual reader of the CPU documentation. It’s only by reading the manual for the Datapoint 2200 much later that I found a confirmation that this was very much intentional and (in the distant past) documented.