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    • 1. 发明专利
    • DE3108568A1
    • 1982-02-04
    • DE3108568
    • 1981-03-06
    • HITACHI LTD
    • WADA KENICHIYAMADA NAOKI
    • G06F9/22G06F9/38G06F9/46G06F9/48
    • An information processing system having an instruction unit for decoding each of successive instructions to generate an address of a next instruction, and additionally, when a branch instruction is decoded, a branch-to address of the decoded branch instruction. An execution unit sequentially executes the decoded instructions and a plurality of registers are provided for storing the next instruction address and the branch-to address. A pointer is generated to indicate one of the registers in which the next instruction address or the branch-to address is to be stored and the pointer is changed sequentially and cyclically in response to a first signal which is generated by the execution unit upon completion of execution of each decoded instruction or a second signal which is generated by the execution unit upon success in branch when a branch instruction is executed. Further provided is a delay circuit for receiving the pointer and generating it at a predetermined time delay. The delayed pointer is latched at a timing predetermined by the first and second signals and an interrupt signal produced, upon detection of an interrupt request, at a timing determined in dependence on the type of the interrupt request, and the instruction address used for a program status word is read out of one of the registers indicted by the latched pointer.
    • 5. 发明专利
    • INFORMATION PROCESSOR
    • JPS6375949A
    • 1988-04-06
    • JP21953986
    • 1986-09-19
    • HITACHI LTD
    • YAMADA NAOKINAKAMURA SHINICHI
    • G06F9/34G06F12/06
    • PURPOSE:To easily realize the transfer of address conversion to anther area, by mapping the address conversion applied on instruction readout, and the address conversion applied on data access, separately in different memory areas. CONSTITUTION:An instruction readout address expanding information holding register is sent out to an address conversion mechanism 7 when a processor performs instruction readout access on an overlay area 11, and is operated to obtain a main memory address. Similarly, an operand readout address expanding information holding register is sent out to the address conversion mechanism 7 when the processor 3 performs operand readout access, and is operated to obtain the address of the main memory 4. In such a way, it is possible to handle data in another main memory area by a control program by supplying different expanding information, and also to operate a system assuming the overlay area 11 as an even program area by coinciding the expanding information.
    • 7. 发明专利
    • Data processing device
    • 数据处理设备
    • JPS5956278A
    • 1984-03-31
    • JP16651082
    • 1982-09-27
    • Hitachi Ltd
    • YAMADA NAOKI
    • G06F12/10G06F12/08
    • G06F12/08
    • PURPOSE:To shorten the time from instruction read to operand read to improve the performance of a processing device, by providing an adder, which outputs a logical address, and a generating means which combines the output of an address conversion mechanism and a lower bit part of the logical address to generate the whole of an actual address. CONSTITUTION:When the value of a base register number 2 of an instruction set to an instruction register 1 is (1) and the value of an address displacement 3 is 900 in the hexadecimal numeration, contents of the base register number 2 are transmitted to a general register 4 and a high-speed address conversion buffer 11, and contents of a base register and an actual address value are read out. Since it cannot be discriminated at this time whether the actual address value is 00008 or 00009, both values are outputted. The value of the general register 4 is inputted to an address adder 5 to perform address addition. The value of a carry of upper 20 bits of the address is transmitted to the high-speed address conversion buffer 11 in the course of address addition, and value 00008 for the carry is selected as the actual address by a selecting circuit 14.
    • 目的:通过提供输出逻辑地址的加法器和将地址转换机构的输出与低位部分组合的发生装置缩短从指令读取到操作数读取的时间,以提高处理装置的性能 的逻辑地址来生成整个实际地址。 构成:当指令寄存器1的指令的基址寄存器编号2的值为(1),并且地址位移3的值在十六进制数字中为900时,基地址寄存器编号2的内容被发送到 通用寄存器4和高速地址转换缓冲器11,读出基本寄存器和实际地址值的内容。 由于此时无法辨别实际地址值是00008还是00009,所以输出两个值。 通用寄存器4的值被输入到地址加法器5以执行地址相加。 在地址相加过程中,将地址高20位的进位值发送到高速地址转换缓冲器11,并通过选择电路14将进位的值00008选择为实际地址。
    • 10. 发明专利
    • DATA PROCESSOR
    • JPS5848129A
    • 1983-03-22
    • JP14625181
    • 1981-09-18
    • HITACHI LTD
    • YAMADA NAOKIIZUMI CHIKAHIKO
    • G06F11/22G06F11/267G06F13/00
    • PURPOSE:To find design inferiority in a parity check by an input and output processor through pseudo input an output equipment which sends out an interface check signal for showing parity check incongruence when an interface determination signal is turned off. CONSTITUTION:Interface signals 511-51N are sent to an input and output processor and also inputted to a parity check signal generating circuit 11. The output of the cirucit 11 is inputted to an exclusive OR circuit 12 to output an interface check signal 52. The exclusive OR circuit 12 inputs the output of an interface determination signal 53 through a signal NOT circuit 13 to invert the value of the interface parity check signal 52 when the signal 53 is turned off, and thus the result of the interface signal parity check shows incongruence in principle, thereby showing the congruency of the parity check result with extremely low probability.