A Processor Family for Personal Computers
Article Abstract:
The Intel 80286 provides direct hardware support for multitasking, memory management, and protection for multiple window user interfaces on personal computers. Multitasking performance is aided by data structures recognized directly by the CPU hardware. The instruction set is broadened from earlier processors. Memory management is simplified by segmentation, memory mapping, and virtual address space partitions. The 80286 can switch tasks in only twenty-one microseconds thanks to its dedicated hardware support. Certain instructions support multiple processor configurations. Multiple protection devices exist, including the virtual address partition, and specific privilege-rights checks. The processor also supports a kernel-based secure operating system to implement sophisticated security policies. Fast memory chips are not required because the chip has a pipeline for four state machines for bus interface, instruction decode, execution, and address decode. The next step in chip evolution will be the 32-bit 80386 processor. Diagrams illustrate memory segmentation, address translation, task management, security methods, system configuration, and performance measurements. Tables also give performance comparisons.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1984
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Computing image texture features in parallel computers
Article Abstract:
Haralick's texture measures are shown to be amenable to efficient implementation in certain fine-grained architectures. The Send or Random Access Write command is the main operation used to compute these features, and the command is efficiently implemented on a number of today's computers. Computation of gray-level dependency matrices are shown to require random global communication patterns. The classification measures proposed by Haralick and his associates are shown to be good candidates as benchmarks for parallel computer vision architectures.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1988
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