Editing Intel iAPX 432 (section)

===Garbage collection===
Software running on the 432 does not need to explicitly deallocate objects that are no longer needed. Instead, the microcode implements part of the marking portion of [[Edsger Dijkstra]]'s on-the-fly parallel [[Garbage collection (computer science)|garbage collection]] algorithm (a [[mark-and-sweep]] style collector).<ref>{{Cite journal | doi = 10.1145/359642.359655| last1 = Dijkstra | first1 = E. W. | author-link1 = Edsger W. Dijkstra| last2 = Lamport | first2 = L. | author-link2 = Leslie Lamport| last3 = Martin | first3 = A. J. | last4 = Scholten | first4 = C. S.| last5= Steffens | first5 = E. F. M.| title = On-the-fly garbage collection: an exercise in cooperation| journal = [[Communications of the ACM]]| volume = 21| issue = 11| date = November 1978 | pages = 966–975| s2cid = 8017272 | doi-access = free}}</ref> The entries in the system object table contain the bits used to mark each object as being white, black, or grey as needed by the collector. The [[iMAX 432]] operating system includes the software portion of the garbage collector.<ref>{{cite web|url=http://bitsavers.org/components/intel/iAPX_432/172103-002_iMAX_432_Reference_Manual_May82.pdf|title=iMAX 432 Reference Manual|date=May 1982|publisher=[[Intel]]}}</ref>