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PMMU

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PMMU

(Paged Memory Management Unit) A virtual memory chip for the 68020 processor (it is built in on the 68030), which is required to run A/UX on the Mac or any 68020 platform running hardware virtual memory.
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References in periodicals archive
A PMMU chip, which provides upgrade memory management for Mac II micros, is available for $499.
The Macintosh IIx Logic Board Upgrade Kit provides a Mac II user both the functionality associated with the built-in PMMU and the improved performance associated with the 68030 and 68882.
New 68030-based Mac has innovative drive
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