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A 68451 MMU, which could be used with the Motorola 68010. A memory management unit (MMU), sometimes called paged memory management unit (PMMU), [1] is a computer hardware unit that examines all memory references on the memory bus, translating these requests, known as virtual memory addresses, into physical addresses in main memory.
In computing, an input–output memory management unit (IOMMU) is a memory management unit (MMU) connecting a direct-memory-access–capable (DMA-capable) I/O bus to the main memory. Like a traditional MMU, which translates CPU -visible virtual addresses to physical addresses , the IOMMU maps device-visible virtual addresses (also called device ...
A memory protection unit (MPU) is a computer hardware unit that provides memory protection.It is usually implemented as part of the central processing unit (CPU). [1] MPU is a trimmed down version of memory management unit (MMU) providing only memory protection support.
The SPARC V9 architecture allows an implementation of SPARC V9 to have no MMU, an MMU with a software-managed TLB, or an MMU with a hardware-managed TLB, [13] and the UltraSPARC Architecture 2005 specifies a software-managed TLB. [14] The Itanium architecture provides an option of using either software- or hardware-managed TLBs. [15]
Instructions per second (IPS) is a measure of a computer's processor speed. For complex instruction set computers (CISCs), different instructions take different amounts of time, so the value measured depends on the instruction mix; even for comparing processors in the same family the IPS measurement can be problematic.
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A Sun 3/80 workstation. In 1989, coincident with the launch of the SPARCstation 1, Sun launched three new Sun-3 models, the 3/80, 3/470 and 3/480.Unlike previous Sun-3s, these use a Motorola 68030 processor, 68882 floating-point unit, and the 68030's integral MMU.
Their first computer was the 16-bit Modcomp III, introduced shortly after the company was founded. This had 15 general-purpose registers, and was initially offered with a 16-kilobyte (16,384 bytes), 18-mil magnetic-core memory with an 800 ns cycle time, expandable to 128 kilobytes (131,072 bytes).