公开(公告)号：US4223381A

公开(公告)日：1980-09-16

申请号：US921075

申请日：1978-06-30

申请人： James O. Rozell ,  David W. Abmayr

发明人： James O. Rozell ,  David W. Abmayr

IPC分类号： G06F9/28 ,  G06F9/22 ,  G06F9/30 ,  G06F9/34 ,  G06F9/355 ,  G06F9/38 ,  G06F12/06 ,  G06F13/00 ,  G06F9/06

CPC分类号： G06F9/342 ,  G06F12/0623 ,  G06F9/30145 ,  G06F9/383

摘要： A selective memory addressing scheme employs a programmable read only memory (PROM) which responds to the opcode of the next instruction to be executed and supplies control information to memory module selection registers.The memory module selection registers operate in conjunction with the internal address registers to provide the necessary steering information for properly addressing the intended memory location. The PROM is programmed in accordance with the instruction set by which the processor operates and is coupled to decode the opcode contents of the instruction register that has been loaded, in a lookahead fashion, with the instruction following the instruction presently being executed by the central processing unit.The PROM has a first output that defines whether or not a second output of the PROM is to be used to select the memory module containing the operand to be referenced in the execution of the next instruction. This second output of the PROM is of a code size required to identify any one of the modules in the bank. The PROM has a third output that may be used to increment the location counter based upon the length of the next instruction. Where the second output of the PROM is not to be used to select the memory module containing the operand to be referenced, the first output of the PROM has a state such that it gates out information stored in a program status word register to identify the memory module containing the operand of the next instruction to be executed.To provide for direct CPU intervention in the execution of instructions, such as may occur in the case of an interrupt, prescribed bits of the CPU data bus may be selectively coupled to the module selection circuitry, so that the opcode-dependent operation of the PROM is bypassed and direct CPU selection within the memory bank may be achieved.

摘要翻译： 选择性存储器寻址方案采用可编程只读存储器（PROM），其响应于要执行的下一条指令的操作码，并将控制信息提供给存储器模块选择寄存器。存储器模块选择寄存器与内部地址寄存器一起操作 提供必要的指导信息，以正确地解决预期的存储位置。 PROM根据处理器操作的指令集进行编程，并且被耦合以以预先的方式将已经加载的指令寄存器的操作码内容与当前正在由中央处理执行的指令之后的指令进行解码 单元。 PROM具有第一输出，其定义是否使用PROM的第二输出来选择在执行下一条指令时包含要被引用的操作数的存储器模块。 PROM的第二个输出是识别银行中任何一个模块所需的代码大小。 PROM具有可以用于基于下一个指令的长度来增加位置计数器的第三输出。 在PROM的第二输出不被用于选择包含要被引用的操作数的存储器模块的情况下，PROM的第一输出具有这样的状态，使得它将输出存储在程序状态字寄存器中的信息来识别存储器 模块包含要执行的下一条指令的操作数。 为了提供直接CPU干预执行指令，例如在中断的情况下可能发生的CPU数据总线的指定位可以选择性地耦合到模块选择电路，使得PROM的操作码相关操作 被旁路并且可以实现存储体内的直接CPU选择。

公开(公告)号：US5325532A

公开(公告)日：1994-06-28

申请号：US951226

申请日：1992-09-25

申请人： Wm. Caldwell Crosswy ,  Dwight L. Barron ,  David W. Abmayr ,  Harvey M. Rosenblum ,  David M. Burckhartt

发明人： Wm. Caldwell Crosswy ,  Dwight L. Barron ,  David W. Abmayr ,  Harvey M. Rosenblum ,  David M. Burckhartt

IPC分类号： G06F9/445

CPC分类号： G06F9/4406 ,  G06F9/4411 ,  G06F9/44521

摘要： A computer system which includes certain minimum capabilities in a system ROM. Device driver software is located in the system ROM or adapter ROM's. On boot the computer system collects these device drivers from ROM to develop a minimal system. If a removable medium such as a floppy disk or CD-ROM is present a configuration mode is entered when final driver files and operating system modules are stored on a selected hard disk. After this storage the device driver modules and operating system modules necessary to develop a boot image of the operating system are gathered and linked. The boot image is generated and stored, allowing use on the following boot operations. The computer system detects device changes and rebuilds the boot image as necessary. If the devices have remained the same the previously stored boot image is loaded and operating system execution commences.

摘要翻译： 包括系统ROM中的某些最小能力的计算机系统。 设备驱动程序软件位于系统ROM或适配器ROM中。 在引导时，计算机系统从ROM收集这些设备驱动程序以开发最小的系统。 如果存在诸如软盘或CD-ROM的可移动介质，则当最终驱动程序文件和操作系统模块存储在所选择的硬盘上时，输入配置模式。 存储后，收集并链接开发操作系统引导映像所需的设备驱动程序模块和操作系统模块。 引导映像生成并存储，允许在以下引导操作中使用。 计算机系统检测设备更改并根据需要重新构建引导映像。 如果设备保持不变，则先前存储的引导映像将被加载并且操作系统执行开始。

公开(公告)号：US4349695A

公开(公告)日：1982-09-14

申请号：US51903

申请日：1979-06-25

申请人： Barrie O. Morgan ,  David W. Abmayr

发明人： Barrie O. Morgan ,  David W. Abmayr

IPC分类号： H04L9/32 ,  H04L9/00

CPC分类号： H04L9/0637 ,  H04L9/0866 ,  H04L9/3271 ,  H04L2209/043

摘要： The specification discloses a system and method for authenticating a message recipient prior to transmission of a message and for authenticating the message content after receipt of the message. A randomized character or character sequence is initially enciphered at the authenticator station and stored. The enciphered character is transmitted to the message recipient. The enciphered character is deciphered by the message recipient to reproduce the randomized character. The randomized character is reenciphered by the message recipient and transmitted back to the authenticator station. The reenciphered character is deciphered and the stored randomized character is compared with the deciphered character. The message recipient is authenticated if the stored randomized character exactly compares with the deciphered character. In order to authenticate the message after receipt, polynomial block check characters are accumulated from the message. The block check characters are enciphered according to a predetermined enciphering scheme and transmitted to a remote location, along with the message. The message is received at the remote location and polynomial block check characters are accumulated in response to the received message. Enciphered block check characters are received and deciphered according to the reverse of the predetermined enciphering scheme. The accumulated block check characters are compared with the deciphered block check characters and the message is authenticated if the compared characters are the same.

摘要翻译： 本说明书公开了一种用于在传送消息之前验证消息接收者并且在接收到消息之后验证消息内容的系统和方法。 随机化的字符或字符序列最初被加密在认证台并被存储。 加密字符被发送到消息接收者。 加密字符由消息接收者解密以再现随机字符。 随机化字符由消息接收者重新发送并发送回验证台。 重新加密的字符被解密，存储的随机字符与被解密的字符进行比较。 如果存储的随机字符与被解密的字符完全相比，则消息接收者被认证。 为了在接收后对消息进行认证，从消息中累积多项式块校验字符。 块检查字符根据预定的加密方案进行加密，并与消息一起发送到远程位置。 该消息在远程位置被接收，并且响应于所接收的消息累积多项式块检查字符。 根据预定的加密方案的相反，接收和解密加密块检查字符。 累积块检查字符与解密块检查字符进行比较，如果比较字符相同，则消息被认证。