Although this page talks about the 8085 instruction set, Wikipedia says it was almost identical to the original 8080, and therefore has a lot in common with the

Although this page talks about the 8085 instruction set, Wikipedia says it was almost identical to the original 8080, and therefore has a lot in common with the 8080-derived (and much more popular) Z80 CPU. This octal-based organisation was also inherited by the x86 architecture: http://www.dabo.de/ccc99/www.camp.ccc.de/radio/help.txt http://www.dabo.de/ccc99/www.camp.ccc.de/radio/help.txt