公开(公告)号：US3889109A

公开(公告)日：1975-06-10

申请号：US40224773

申请日：1973-10-01

Applicant: HONEYWELL INF SYSTEMS

Inventor： BLESSIN RONALD W

IPC: H04L1/24 ,  G06F11/00

CPC classification number: H04L1/24

Abstract: A data communications subchannel includes apparatus for separately testing the operation of the send control logic and the receive control logic. During testing operations the subchannel is configured in a wraparound mode so that data sent from a processor is routed through the send control logic and the receive control logic back to the processor. A ''''Cyclic Redundancy Check'''' is performed on the return data to determine if any errors are present. If errors are present in the return data the send control logic and the receive control logic can be selectively bypassed to aid in determining where the errors originate. Special control signals from the processor are used to configure the subchannel into the modes which perform the error testing.

Abstract translation: 数据通信子信道包括用于单独测试发送控制逻辑和接收控制逻辑的操作的装置。 在测试操作期间，子信道被配置成环绕模式，使得从处理器发送的数据通过发送控制逻辑和接收控制逻辑被路由回处理器。 对返回数据执行“循环冗余检查”，以确定是否存在任何错误。 如果返回数据中存在错误，则可以选择性地旁路发送控制逻辑和接收控制逻辑，以帮助确定错误起始位置。 来自处理器的特殊控制信号用于将子通道配置为执行错误测试的模式。

公开(公告)号：US3680057A

公开(公告)日：1972-07-25

申请号：US3680057D

申请日：1970-11-02

Applicant: HONEYWELL INF SYSTEMS

Inventor： BLESSIN RONALD W ,  KENNEDY JAMES A

IPC: G06F13/38 ,  H04L5/02 ,  G06F13/04

CPC classification number: G06F13/385 ,  H04L5/02

Abstract: A data communications subchannel uses input signals and decoding logic to select the baud rate, the length of message characters, the mode of operation and the number of stop bits in a message character used in transmitting binary message characters between a data communications subchannel and a terminal device.

Abstract translation: 数据通信子信道使用输入信号和解码逻辑来选择在数据通信子信道和终端之间传输二进制消息字符中使用的消息字符的波特率，消息字符长度，操作模式和停止位数 设备。

公开(公告)号：US3680051A

公开(公告)日：1972-07-25

申请号：US3680051D

申请日：1970-07-29

Applicant: HONEYWELL INF SYSTEMS

Inventor： BLESSIN RONALD W ,  KENNEDY JAMES A

IPC: H04J3/07 ,  G06F1/04

CPC classification number: H04J3/07

Abstract: Apparatus for maintaining character synchronization in a data communication system comprises a buffer to store characters being transferred from a communications controller to a terminal device, a shift register connected between the buffer and the terminal device and a source of fill characters which provides characters to fill any gap between message characters provided by the communications controller.

Abstract translation: 用于在数据通信系统中维持字符同步的装置包括一个缓冲器，用于存储从通信控制器传送到终端设备的字符，连接在缓冲器和终端设备之间的移位寄存器和一个填充字符源， 由通信控制器提供的消息字符之间的差距。