公开(公告)号：US4321665A

公开(公告)日：1982-03-23

申请号：US8121

申请日：1979-01-31

申请人： Jian-Kuo Shen ,  John J. Bradley ,  Richard L. King ,  Robert C. Miller ,  Ming T. Miu ,  Theodore R. Staplin, Jr.

发明人： Jian-Kuo Shen ,  John J. Bradley ,  Richard L. King ,  Robert C. Miller ,  Ming T. Miu ,  Theodore R. Staplin, Jr.

IPC分类号： G06F13/40 ,  G06F3/00

CPC分类号： G06F13/4013

摘要： In a data processing system which includes a central processing unit (CPU), main memory and a plurality of input/output controllers (IOCs) connected to a common bus information can be transferred between the main memory and CPU and main memory and the IOCs. Logic is provided within the CPU to align a byte of data on the data lines of the common bus such that it can be taken from the data lines by the main memory and written into a multi byte word without further alignment. Logic is provided within the CPU to extract from a multi byte word of data read from main memory and appearing on the common bus data lines the appropriate byte of data and to align it on the common bus data lines such that an IOC may pass the data byte to a peripheral device without further alignment.

摘要翻译： 在包括中央处理单元（CPU）的数据处理系统中，主存储器和连接到公共总线信息的多个输入/输出控制器（IOC）可以在主存储器和CPU以及主存储器和IOC之间传送。 在CPU内部提供逻辑，以便在公共总线的数据线上对齐一个数据字节，使得它可以从主存储器从数据线中取出，并写入多字节字而无需进一步对齐。 在CPU中提供逻辑以从从主存储器读取的数据的多字节字提取出公共总线数据线上相应的数据字节并将其对准在公共总线数据线上，使得IOC可以传递数据 字节到外围设备，无需进一步对齐。

公开(公告)号：US4300194A

公开(公告)日：1981-11-10

申请号：US8004

申请日：1979-01-31

申请人： John J. Bradley ,  Ming T. Miu ,  Jian-Kuo Shen

发明人： John J. Bradley ,  Ming T. Miu ,  Jian-Kuo Shen

IPC分类号： G06F13/36 ,  G06F13/362 ,  G06F3/04

CPC分类号： G06F13/362

摘要： Multiple common buses are provided for coupling a plurality of units in a data processing system for the transfer of information therebetween. The central processing unit (CPU) allocates the multiple common buses to one of the units in response to bus requests received from various units desiring to use the common buses. Bus requests are generated in a synchronous manner by use of a timing signal originating in the CPU which is connected in series between the one or more units on each of the multiple common buses.

摘要翻译： 提供多个公共总线用于在数据处理系统中耦合多个单元以便在其间传送信息。 中央处理单元（CPU）响应于从希望使用公共总线的各个单元接收的总线请求，将多个公共总线分配给单元之一。 通过使用源自CPU的定时信号以同步方式产生总线请求，该定时信号串联连接在多个公共总线中的每一个上的一个或多个单元之间。

公开(公告)号：US4293908A

公开(公告)日：1981-10-06

申请号：US8001

申请日：1979-01-31

申请人： John J. Bradley ,  Thomas O. Holtey ,  Robert C. Miller ,  Ming T. Miu ,  Jian-Kuo Shen ,  Theodore R. Staplin, Jr.

发明人： John J. Bradley ,  Thomas O. Holtey ,  Robert C. Miller ,  Ming T. Miu ,  Jian-Kuo Shen ,  Theodore R. Staplin, Jr.

IPC分类号： G06F13/28 ,  G06F13/362 ,  G06F13/00

CPC分类号： G06F13/362 ,  G06F13/282

摘要： In a data processing system which includes one or more common buses to which a plurality of input/output controllers are connected for the transfer of data, blocks of data may be transferred between main memory and an input/output controller (IOC) synchronously with operation of the central processing unit (CPU). Logic is provided for enabling one unit of data to be transferred during a Direct Memory Access (DMA) data transfer operation in which the requesting IOC requests a DMA data transfer of the CPU. Means are provided within the system for: resolving conflicting requests for the one or more common buses, the CPU to acknowledge the DMA request, the IOC to transfer the address of the location where the unit of data is to be written into main memory followed by the unit of data, or the IOC to transfer the address of the location in main memory from which the unit of data is to be read and then receive the unit of data read from main memory.

摘要翻译： 在包括一个或多个公共总线的数据处理系统中，多个输入/输出控制器连接到该公共总线用于传送数据，数据块可以在主存储器和与操作同步的输入/输出控制器（IOC）之间传送 的中央处理单元（CPU）。 提供逻辑用于在直接存储器访问（DMA）数据传输操作期间传送一个数据单元，其中请求IOC请求CPU的DMA数据传输。 在系统内提供的装置是：解决对一个或多个公共总线的冲突请求，CPU确认DMA请求，IOC将要写入数据单元的位置的地址传送到主存储器，之后是 数据单元或IOC传输要从其读取数据单元的主存储器中的位置的地址，然后接收从主存储器读取的数据单元。

公开(公告)号：US4488227A

公开(公告)日：1984-12-11

申请号：US446748

申请日：1982-12-03

申请人： Ming T. Miu ,  John J. Bradley

发明人： Ming T. Miu ,  John J. Bradley

IPC分类号： G06F9/42 ,  G06F9/22 ,  G06F9/26 ,  G06F9/32 ,  G06F9/40

CPC分类号： G06F9/30054 ,  G06F9/268 ,  G06F9/4426

摘要： A computer system which facilitates the execution of nested subroutines and interrupts is disclosed. As each branch transfer within the program is executed by a control area logic, a microcommand initiates the transfer of the return address, which has been derived from the address in the present routine, to a first register of a push down stack. In addition, the microcommand also pushes down one level the contents of all of the registers in the stack containing previously stored return addresses. Thus, a sequential return to unfinished routines or subroutines is provided. When the subroutine or hardware interrupt service routine is completed, a code in the address field enables the return address of the previously branched from or interrupted routine to be retrieved from the first register in the push down stack and to provide it as the address of the next instruction to be executed. The retrieval of the return address from the push down stack also pops all other stored return addresses one level in the stack. In addition to providing multiple levels of subroutine and interrupt nesting, any number of subroutines or hardware interrupts may be partially completed since the last operating subroutine or hardware interrupt service routine is always the first one to be completed. Logic is also provided to detect the occurrence of a hardware interrupt during a return sequence such that the requirement to simultaneously push and pop the stack is properly handled.

摘要翻译： 公开了一种便于执行嵌套子程序和中断的计算机系统。 当程序内的每个分支传送由控制区域逻辑执行时，微指令启动已经从本例程中的地址导出的返回地址到下推堆栈的第一寄存器的传送。 此外，微指令还将包含先前存储的返回地址的堆栈中的所有寄存器的内容推下一级。 因此，提供了顺序返回到未完成的例程或子程序。 当子程序或硬件中断服务程序完成时，地址字段中的代码使得先前分支的或中断的例程的返回地址能够从下推栈中的第一个寄存器检索，并将其提供为 下一条要执行的指令。 从下拉堆栈中检索返回地址也会在堆栈中弹出所有其他存储的返回地址一级。 除了提供多级子程序和中断嵌套之外，任何数量的子程序或硬件中断可能会部分完成，因为最后一个操作子程序或硬件中断服务程序始终是第一个要完成的程序。 还提供逻辑以在返回序列期间检测硬件中断的发生，从而适当地处理同时推送和弹出栈的要求。

公开(公告)号：US4459665A

公开(公告)日：1984-07-10

申请号：US008123

申请日：1979-01-31

申请人： Ming T. Miu ,  John J. Bradley ,  Jian-Kuo Shen

发明人： Ming T. Miu ,  John J. Bradley ,  Jian-Kuo Shen

IPC分类号： G06F3/06 ,  G06F13/362 ,  G06F13/00

CPC分类号： G06F13/362

摘要： One or more common buses are provided for coupling a plurality of units in a data processing system for transfer of information therebetween. The central processing unit (CPU) allocates the one or more common buses to one of the requesting units as a function of request type and on which of one or more common buses the requesting unit is located. Bus requests are generated in a synchronous manner by use of a timing signal originating in the CPU which is connected in series between the one or more units on each of the one or more common buses.

摘要翻译： 一个或多个公共总线被提供用于耦合数据处理系统中的多个单元以在其间传送信息。 中央处理单元（CPU）根据请求类型和请求单元所位于的一个或多个公共总线中的哪一个将请求单元之一分配给一个或多个公共总线。 通过使用源自CPU的定时信号以同步方式产生总线请求，该定时信号串联连接在一个或多个公共总线中的每一个上的一个或多个单元之间。

公开(公告)号：US4383295A

公开(公告)日：1983-05-10

申请号：US11001

申请日：1979-02-09

申请人： Robert C. Miller ,  John J. Bradley ,  Boyd E. Darden ,  Ming T. Miu ,  Jian-Kuo Shen ,  Theodore R. Staplin, Jr.

发明人： Robert C. Miller ,  John J. Bradley ,  Boyd E. Darden ,  Ming T. Miu ,  Jian-Kuo Shen ,  Theodore R. Staplin, Jr.

IPC分类号： G06F3/02 ,  G06F9/06

CPC分类号： G06F3/0227

摘要： In a data processing system which includes one or more common buses to which a plurality of input/output controllers are connected for the transfer of data, blocks of data may be transferred between main memory and an input/output controller (IOC) synchronously with operation of the central processor unit (CPU). Logic is provided for enabling one unit of data to be transferred during a Data Multiplex Control (DMC) data transfer operation in which the requesting IOC requests a DMC data transfer of the CPU and later provides the CPU with a channel number assigned to the requesting IOC. In order to allow a data entry operator inputting data via a peripheral device connected to an IOC the ability to correct errors, a backspace character is provided so that the operator can enter it to indicate to the system to ignore the preceding character. Logic is provided within the system to allow a DMC IOC to detect the output of a backspace character from the peripheral device connected to the IOC and to inform the CPU of the entry of the backspace character by a special (backspace) input/output interrupt. Further logic is provided within the CPU to adjust pointers to the main memory input buffer to effectively ignore the byte of data corresponding to the character preceding the backspace character. Still further logic is provided within the DMC IOC to prohibit the sending of special (backspace) input/output interrupts to the CPU if there are no bytes of data remaining in the input buffer.

摘要翻译： 在包括一个或多个公共总线的数据处理系统中，多个输入/输出控制器连接到该公共总线用于传送数据，数据块可以在主存储器和与操作同步的输入/输出控制器（IOC）之间传送 的中央处理器单元（CPU）。 提供逻辑用于在数据复用控制（DMC）数据传输操作期间传输一个数据单元，其中请求的IOC请求CPU的DMC数据传输，并且稍后向CPU提供分配给请求的IOC的通道号 。 为了允许数据输入操作者通过连接到IOC的外围设备输入数据以校正错误的能力，提供退格字符，以便操作者可以进入它以指示系统忽略前一个字符。 在系统中提供逻辑，以允许DMC IOC从连接到IOC的外围设备检测退格字符的输出，并通过特殊（退格）输入/输出中断向CPU通知退格字符的输入。 在CPU内提供进一步的逻辑来调整指向主存储器输入缓冲器的指针，以有效地忽略与退格字符之前的字符相对应的数据字节。 在DMC IOC中还提供了一些逻辑，以禁止在CPU中输入/输出特殊的（空格）输入/输出中断，如果输入缓冲区中没有字节数据。

公开(公告)号：US4300193A

公开(公告)日：1981-11-10

申请号：US8003

申请日：1979-01-31

申请人： John J. Bradley ,  Robert C. Miller ,  Ming T. Miu ,  Jian-Kuo Shen ,  Theodore R. Staplin, Jr.

发明人： John J. Bradley ,  Robert C. Miller ,  Ming T. Miu ,  Jian-Kuo Shen ,  Theodore R. Staplin, Jr.

IPC分类号： G06F13/28 ,  G06F3/00

CPC分类号： G06F13/282

摘要： In a data processing system which includes one or more common buses to which a plurality of input/output controllers are connected for the transfer of information, blocks of information may be transferred between main memory and an input/output controller (IOC) synchronously with operations of the central processor unit (CPU). Logic is provided for enabling one unit of the block of information to be transferred during a Data Multiplex Control (DMC) data transfer operation in which the requesting IOC requests a DMC data transfer of the CPU and provides the CPU with a channel number assigned to the requesting IOC. Means are provided within the CPU for determining: the direction of the data transfer, the address of the location of the unit of data to be transferred to/from the main memory, and the number of units of data remaining to be transferred between the main memory and the IOC.

摘要翻译： 在包括一个或多个公共总线的数据处理系统中，多个输入/输出控制器连接到多个输入/输出控制器用于信息的传送，信息块可以在主存储器和与操作同步的输入/输出控制器（IOC）之间传送 的中央处理器单元（CPU）。 逻辑被提供用于使得在数据复用控制（DMC）数据传送操作期间传送信息块的一个单元，其中请求的IOC请求CPU的DMC数据传送，并向CPU提供分配给 请求IOC。 在CPU内提供用于确定：数据传送的方向，要传送到主存储器的数据单元的位置的地址以及在主存储器之间传输的剩余数据的单元数量 记忆和国际奥委会。

公开(公告)号：US4484271A

公开(公告)日：1984-11-20

申请号：US392500

申请日：1982-06-28

申请人： Ming T. Miu ,  John J. Bradley ,  Jian-Kuo Shen

发明人： Ming T. Miu ,  John J. Bradley ,  Jian-Kuo Shen

IPC分类号： G06F9/26

CPC分类号： G06F9/268

摘要： A hardware interrupt apparatus for assigning the microprogrammed control system to the highest priority hardware interrupt requesting service. In a microprogrammed control system having at least one hardware interrupt, the presence of a hardware interrupt request will cause the interruption of the currently executing microprogram at the end of the current microinstruction. The address of the next microinstruction in the interrupted microprogram is saved in a hardware interrupt return address register and the next microinstruction address is generated as a function of the particular hardware interrupt to be serviced. A microprogram dedicated to servicing the particular hardware interrupt is then entered at the hardware interrupt generated next microinstruction address. Logic is provided within each microinstruction to inhibit hardware interrupts. Logic is provided within each microinstruction to indicate that the address of the next microinstruction should be taken from the hardware interrupt return address register, thereby allowing for the resumption of the interrupted microprogram. The hardware interrupt apparatus is further organized such that the entry to a second hardware interrupt service microprogram can be made upon the completion of a first hardware interrupt service microprogram without having to return to the original microprogram interrupted by the first hardware interrupt. Upon completion of the second hardware interrupt microprogram service routine, return can be made to the original microprogram interrupted by the first hardware interrupt.

摘要翻译： 一种硬件中断装置，用于将微程序控制系统分配给最高优先级的硬件中断请求服务。 在具有至少一个硬件中断的微程序控制系统中，存在硬件中断请求将导致在当前微指令结束时当前执行的微程序的中断。 中断微程序中的下一个微指令的地址被保存在硬件中断返回地址寄存器中，并且根据要维护的特定硬件中断产生下一个微指令地址。 然后在产生下一个微指令地址的硬件中断输入专用于维护特定硬件中断的微程序。 在每个微指令内提供逻辑以禁止硬件中断。 在每个微指令内提供逻辑，以指示下一个微指令的地址应从硬件中断返回地址寄存器中取出，从而允许恢复中断的微程序。 硬件中断装置被进一步组织，使得可以在完成第一硬件中断服务微程序之后进入到第二硬件中断服务微程序，而不必返回到由第一硬件中断中断的原始微程序。 在完成第二个硬件中断微程序服务程序后，可以返回由第一个硬件中断中断的原始微程序。

公开(公告)号：US4608659A

公开(公告)日：1986-08-26

申请号：US537991

申请日：1983-09-30

申请人： John J. Bradley ,  Theodore R. Staplin, Jr. ,  Ming T. Miu ,  Thomas C. O'Brien ,  George M. O'Har ,  Melinda A. Widen ,  Brian L. Stoffers

发明人： John J. Bradley ,  Theodore R. Staplin, Jr. ,  Ming T. Miu ,  Thomas C. O'Brien ,  George M. O'Har ,  Melinda A. Widen ,  Brian L. Stoffers

IPC分类号： G06F7/48 ,  G06F7/57 ,  G06F11/10

CPC分类号： G06F7/57 ,  G06F7/491 ,  G06F7/49905

摘要： What is disclosed is apparatus making up an arithmetic logic unit and utilizing a programmable read-only memory (PROM) to perform arithmetic functions for an associated processor. The PROM is used as a look-up table for computation results. Operands used to perform a mathematical computation make up an address to the PROM which is used to read out the computation result stored therein. Also stored in the PROM as part of each computation result are information bits indicating if the computation result is a valid answer. These bits are also read out and stored in flip-flops to indicate to the processor if the computation result is valid or invalid.

摘要翻译： 所公开的是组成算术逻辑单元并利用可编程只读存储器（PROM）来执行相关处理器的算术功能的装置。 PROM用作计算结果的查找表。 用于执行数学计算的操作数构成了用于读出存储在其中的计算结果的PROM的地址。 作为每个计算结果的一部分，还存储在PROM中的是指示计算结果是否是有效答案的信息比特。 这些位也被读出并存储在触发器中以向处理器指示计算结果是有效还是无效。

公开(公告)号：US4495571A

公开(公告)日：1985-01-22

申请号：US339278

申请日：1982-01-15

申请人： Theodore R. Staplin, Jr. ,  John J. Bradley ,  Richard L. King ,  Robert C. Miller ,  Ming T. Miu ,  Jian-Kuo Shen

发明人： Theodore R. Staplin, Jr. ,  John J. Bradley ,  Richard L. King ,  Robert C. Miller ,  Ming T. Miu ,  Jian-Kuo Shen

IPC分类号： G06F13/12 ,  G06F13/362 ,  G06F3/04 ,  G06F13/00

CPC分类号： G06F13/122 ,  G06F13/362

摘要： A data processing system which includes a central processing unit coupled over a common bus with a plurality of input/output controllers (IOCs) and main memory includes apparatus which allows an IOC to signal the CPU to wait and retry the current I/O instruction. Other apparatus is provided which enables the CPU to continually retry the I/O instruction until the IOC accepts or rejects the I/O instruction and which further allows the CPU to suspend the retrying of the I/O instruction and to process interrupt requests and data transfer requests from any one of the plurality of IOCs. After processing the interrupt or data transfer request, system control is returned to retrying the I/O instruction.

摘要翻译： 包括通过公共总线与多个输入/输出控制器（IOC）和主存储器耦合的中央处理单元的数据处理系统包括允许IOC发信号通知CPU等待并重试当前I / O指令的装置。 提供了其他设备，使得CPU能够连续地重试I / O指令，直到IOC接受或拒绝I / O指令，并且还允许CPU暂停重试I / O指令并处理中断请求和数据 转移来自多个IOC中的任何一个的请求。 处理中断或数据传输请求后，返回系统控制以重试I / O指令。