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===Moving up the line===
[[File:Motorola 68000 die.JPG|thumb|The microcode (and "nanocode") of the [[Motorola 68000]] is stored in the two large square blocks in the upper right and
Early [[minicomputer]]s were far too simple to require microcode, and were more similar to earlier mainframes in terms of their instruction sets and the way they were decoded. But it was not long before their designers began using more powerful [[integrated circuit]]s that allowed for more complex ISAs. By the mid-1970s, most new minicomputers and [[superminicomputer]]s were using microcode as well, such as most models of the [[PDP-11]] and, most notably, most models of the [[VAX]], which included high-level instruction not unlike those found in the 360.<ref>{{cite book |date=May 1988 |title=VLSI VAX Micro-Architecture |first=Bob |last=Supnik |publisher=Digital Equipment |url=http://simh.trailing-edge.com/docs/microarch.pdf}}</ref>
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