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    • 81. 发明专利
    • Trap control circuit
    • 捕捉控制电路
    • JPS5920032A
    • 1984-02-01
    • JP13017782
    • 1982-07-26
    • Fujitsu Ltd
    • KUBOU KATSUMIAOKI TAKASHI
    • G06F9/22G06F9/48G06F13/12G06F13/24
    • G06F9/4812
    • PURPOSE:To prevent a request from being accepted when the acceptance of the request is impossible, by using a mask bit of the preceding same instruction to discriminate whether or not the request can be accepted when an error exists in the micro instruction of a CPU. CONSTITUTION:CS (control storage) read data is set to an instruction register. Consequently, mask bits are set to an FF1; and if CS read data has no errors, a CS error bar signal CSERR is H-level, and a signal CSERR is L-level, and the mask bit set to the FF1 are sent through gates AG1 and OG and are used to discriminate whether or not the request can be accepted. Since the mask bit of an instruction A is 1, 1 is set to an FF2. When an instruction A' is next read, a check circuit detects that the instruction A' has an error, and the signal CSERR is set to 1. Consequently, the gate AG1 is closed, and a gate AG2 is opened, and contents of the FF2, namely, mask bit ''1'' of the preceding instruction A is outputted through the gate AG2 and OG.
    • 目的:为了防止在不可能接受请求时接受请求,通过使用前面相同指令的掩码位来判断在微指令中存在错误是否可以接受该请求。 构成:CS(控制存储)读取数据设置为指令寄存器。 因此,掩码位被设置为FF1; CS读数据没有错误时,CS误差信号CSERR为H电平,信号CSERR为L电平,通过门AG1,OG发送设置为FF1的掩码位,用于判别是否 或者不可以接受请求。 由于指令A的掩码位为1,所以设置为FF2。 当下一次读取指令A'时,检查电路检测到指令A'具有错误,并且信号CSERR被设置为1.因此,门AG1闭合,并且门AG2被打开,并且内容 通过门AG2和OG输出FF2,即前一指令A的掩码位“1”。
    • 83. 发明专利
    • ERROR CORRECTING CODE CHECK SYSTEM
    • JPS57162038A
    • 1982-10-05
    • JP4748381
    • 1981-03-31
    • FUJITSU LTD
    • AOKI TAKASHI
    • G06F11/10G06F9/22G06F11/08
    • PURPOSE:To make an exclusive bit for a checking code of a microprogram unnecessary, and to decrease the number of bits per 1 word, by utilizing a characteristic of a horizontal microprogram. CONSTITUTION:1 word of a horizontal microporgram is constituted of 31 bits consisting of 0-30, the bits 0-5 are set to the next address NA, and an address on a control storage device is designated by the following bits 6-30. A field of the bits 6-11 of this program is constituted of an ALUX for designating one input of an operating circuit ALU, an ALUY for designating the other input, the ALU for designating adition, subtraction, etc., and an ARI and an BRI for designating an input of a register AR and BR, respectively. Also, the bits 12-17 are used for designating a condition used for a conditional branch, etc., the bits 18- 23 are used as an input for designating an input of a shifter SH, and the bits 24-29 are used as an address IMM of an extension register. In this way, by utilizing a characteristic of the program, an exclusive bit for a checking code is made unnecessary, and the number of bits per 1 word is decreased.
    • 84. 发明专利
    • ADDRESS STACK CONTROL SYSTEM
    • JPS57162031A
    • 1982-10-05
    • JP4827781
    • 1981-03-31
    • FUJITSU LTD
    • SAKAI KENJIAOKI TAKASHINAKAO SADAO
    • G06F9/22G06F9/26G06F9/42
    • PURPOSE:To lighten the burden of a program generating person, and to easily change a return instruction or a routine of the return instruction, by automatically storing the control information in a stack, and making it unnecessary that the generating person gives the return instruction over again. CONSTITUTION:A data for generating an address data of a main routine and subroutines 2, 3 stored in a microprogram storage device (CS) 6 from a computer is supplied to a CS red address generating circuit 5. In this circuit 5, an address of the CS 6 is generated, and a stack point being a write and read-out address is stored in a stack 4. Also, the address control information is provided to the stack 4 and the circuit 5, and an address of the control information generated by the circuit 5 is stored in address control information storage areas 7-0-7-n. In this state, the routine 1 is executed, and after that, when the control is shifted to the subroutines 2, 3, a return address to the routines 2, 3 and the address control information informing that the control is shifted after the return instruction has been issued are stored in the stack 4.
    • 86. 发明专利
    • TWOOBIT ERROR CORRECTION SYSTEM
    • JPS56111197A
    • 1981-09-02
    • JP1132880
    • 1980-02-01
    • FUJITSU LTD
    • AOKI TAKASHI
    • G06F11/10G06F12/16H03M13/29
    • PURPOSE:To enable to correct 2-bit errors without using the two-bit error correcting code (ECC), by the parity check per each block of a plurality of data added with the 2-bit error detection code for error correction. CONSTITUTION:A plurality of data added with ECC having 1-bit error correction 2-bit error detecting functions in which one word has a given bit, are stored in the memory 1. At the same time, parity bits are provided every bit location of each word and this is stored in the block parity area 1-2 of the memory 1. With this state, the data such as address YA of the memory 1 are read out and a bit error is detected with ECC of the error correcting code area, then checking is made with the parity data of the area 1-2 for each data block per bit, and the error production bits dm, dn are detected from the error presence bits Xm, Xn for the address YA, allowing to correct the 2-bit error with a simple constitution not requiring 2-bit the correction ECC.
    • 88. 发明专利
    • LOCAL MEMORY CONTROL SYSTEM
    • JPS5629743A
    • 1981-03-25
    • JP10461379
    • 1979-08-17
    • FUJITSU LTD
    • AOKI TAKASHISATOU KIYOSUMIMIYAJIMA SHIGERUITOU SHIYOUHEIFURUTA SHIGEKI
    • G06F7/00G06F7/76G06F9/34
    • PURPOSE:To realize a high-speed acceleration by writing both the higher- and lower-rank m-bit data of the 2m-bit data into the designated addresses of the different local memory units during the counting of the floating points. CONSTITUTION:In the local memory device containing the local memory units 7-0 and 7-1 having the m-bit data width each, the local memory registers 2-0 and 2-1 designate the base register and the index register each to carry out the reading in the case of the address calculation. When the data is written, the same contents are secured between registers 2-0 and 2-1. And the same data is written into the same address of the units 7-0 and 7-1. In the case of the floating point arithmetic, both the higher- and lower-rank m bits of the result obtained through the operation carried out at the high-speed arithmetic part 1 are sent to local memory writing registers 5-0 and 5-1 each to be stored in the designated floating point registers of units 7-0 and 7-1 each. In this case, registers 2-0 and 2-1 have the same address information. As a result, not only the address calculation but the floating point arithmetic can be performed in a high speed.