Wyniki wyszukiwania - BazTech

1

Visualizing CPU Microarchitecture

Wojtowicz T.

Schedae Informaticae

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2015

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Vol. 24

197--210

EN

Deep understanding of microprocessor architecture, its internal structure and mechanics of its work is essential for engineers in the fields like computer science, integrated circuit design or embedded systems (including microcontrollers). Usually the CPU architecture is presented at the level of ISA, functional decomposition of the chip and data flows. In this paper we propose more tangible, interactive and effective approach to present the CPU microarchitecture. Based on the recent advancements in simulation of MOS6502, one of the most successful microprocessor of all times, that started the personal computing revolution, we present the CPU visualisation framework. The framework supports showing CPU internals at various levels (from single transistor, through logic gates, ending with registers, operation decoders and ALU). It allows for execution of real code and detailed analysis of fetch–decode–execute cycle, measurement of cycles per operation or measurement of the CPU activity factor. The analysis means provided by this framework will also enable us to propose the transistor level simulation speed improvements to the model in the future.

2

Java Based Transistor Level CPU Simulation Speedup Techniques

Wojtowicz T.

Schedae Informaticae

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2015

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Vol. 24

179--195

EN

Transistor level simulation of the CPU, while very accurate, brings also the performance challenge. MOS6502 CPU simulation algorithm is analysed with several optimisation techniques proposed. Application of these techniques improved the transistor level simulation speed by a factor of 3–4, bringing it to the levels on par with fastest RTL-level simulations so far.

3

Interactive Systems with Registers and Voices

Stefanescu G.

Fundamenta Informaticae

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2006

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Vol. 73, nr 1-2

285-305

EN

We present a model and a core programming language appropriate for modeling and programming interactive computing systems. The model consists of rv-systems (interactive systems with registers and voices); it includes register machines, is space-time invariant, is compositional, may describe computations extending in both time and space, and is applicable to open, interactive systems. To achieve modularity in space the model uses voices (a voice is the time dual of a register) - they provide a high level organization of temporal data and are used to describe interaction interfaces of processes. The programming language uses novel techniques for syntax and semantics to support computation in space paradigm. We describe rv-programs and base their syntax and operational semantics on FIS-es (finite interactive systems) and their grid languages (a FIS is a kind of 2-dimensional automaton specifying both control and interaction used in rv-programs). We also present specification techniques for rv-systems, using relations between input registers and voices and their output counterparts. The paper includes simple specifications for an OO-system and for an interactive game.