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    • 38. 发明申请
    • MICROPROCESSOR
    • 微处理器
    • WO0022507A3
    • 2000-07-13
    • PCT/GB9903100
    • 1999-09-17
    • DIGITAL COMMUNICATION TECHNOLOKUBICZEK MACIEJTURNER CHRISTOPHER ROBERT
    • KUBICZEK MACIEJTURNER CHRISTOPHER ROBERT
    • G06F9/30G06F9/318G06F9/38
    • G06F9/30185G06F9/30101G06F9/30134G06F9/30167G06F9/3017G06F9/30174
    • A microprocessor (10) incorporating a modified Harvard architecture connected to two memory banks (100) and (114). The main CPU also includes two pushdown stacks (104, 108). One of the stacks has its top two items connected directly to an arithmetic-logic unit (103). In addition hardware is provided to perform seven operations on the top three stack elements. The instruction length of the microprocessor is 8 bits and most instructions execute in a single clock cycle. A unique feature of the instruction set is that 128 of the 256 possible bytecodes are user-programmable. Some regular instructions can be "folded" with the "return from subroutine" instruction. This allows the efficient implementation of a wide variety of virtual machines, such as the Java Virtual Machine. The microprocessor also contains dedicated registers and circuits for the efficient implementation of dynamic variables (112), 32-bit immediate constants (109 and 110), interfaces to dedicated co-processors and interfaces to local area networks allowing dynamic upgrades of application software.
    • 包含连接到两个存储体(100)和(114)的修改的哈佛体系结构的微处理器(10)。 主CPU还包括两个下推堆叠(104,108)。 其中一个堆栈的前两个项目直接连接到算术逻辑单元(103)。 此外还提供了硬件来对前三个堆栈元素执行七个操作。 微处理器的指令长度为8位,大多数指令在一个时钟周期内执行。 该指令集的独特功能是256个可能的字节码中的128个是用户可编程的。 一些常规指令可以用“从子程序返回”指令“折叠”。 这样可以高效地实现各种各样的虚拟机,例如Java虚拟机。 微处理器还包含用于有效实现动态变量(112),32位立即数常量(109和110)的专用寄存器和电路,专用协处理器的接口以及允许动态升级应用软件的局域网接口。