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    • 2. 发明授权
    • Method and apparatus for distinguishing between diskettes in a diskette
drive
    • 用于区分软盘驱动器中的软盘的方法和装置
    • US4709367A
    • 1987-11-24
    • US846340
    • 1986-03-31
    • Robert J. GrafeSteven T. Pancoast
    • Robert J. GrafeSteven T. Pancoast
    • G06F3/06G06F12/00G11B20/18G06F11/10G11B5/02
    • G06F3/0601G06F2003/0697
    • A method and apparatus are disclosed for enabling a diskette drive system to distinguish between diskettes and verify that the diskette currently in the drive is the correct one. Each diskette contains a file allocation table for controlling the allocation and deallocation of storage space on the diskette. Each time that the file allocation table on a diskette is accessed, i.e., read or written, a cyclic redundancy check (CRC) value for the file allocation table is calculated and stored. When checking the validity of a diskette, i.e., that the correct diskette is in the drive, a CRC value for the file allocation table of the currently loaded diskette is calculated and compared to the most recently stored CRC value. If the most recently calculated CRC value does not match the most recently stored CRC value, then this is an indication that the wrong diskette is currently in the diskette drive. A warning is then provided to the system user to change diskettes before a read or a write operation will be commenced.
    • 公开了一种用于使软盘驱动器系统能够区分软盘并验证当前在驱动器中的软盘是否正确的方法和装置。 每个软盘包含一个文件分配表,用于控制磁盘上的存储空间的分配和释放。 每次访问软盘上的文件分配表,即读取或写入时,计算并存储用于文件分配表的循环冗余校验(CRC)值。 当检查软盘的有效性,即正确的软盘在驱动器中时,计算当前加载的软盘的文件分配表的CRC值,并将其与最近存储的CRC值进行比较。 如果最近计算出的CRC值与最近存储的CRC值不匹配,那么这表明错误的软盘当前在软盘驱动器中。 然后,在开始读取或写入操作之前,向系统用户提供警告以更换软盘。
    • 7. 发明授权
    • Text processing system with communication data save facility
    • 文本处理系统具有通讯数据保存功能
    • US4480308A
    • 1984-10-30
    • US440400
    • 1982-11-09
    • Robert J. GrafeGary E. Leikam
    • Robert J. GrafeGary E. Leikam
    • G06F13/00G06F9/46G06F17/21G06F17/22G06F17/24G06F1/00
    • G06F9/461G06F17/2205G06F17/2258G06F17/24
    • In a text processor including a communications facility, different tasks, such as typing tasks and communications tasks are entered into the machine from different program diskettes. As each is so entered, in view of the fact that main memory space is limited, it overlays control data in the main memory relating to the previous task. In a communications session, the operator has to build a queue of documents for sending under the control of communications foreground control (CFC) and communications background control (CBC) blocks in the main memory. If the operator is required to terminate this task before its completion, his queue data is lost as it is overlaid by control data relating to a new task that is entered, so on return to the communications task, he has to start from the beginning. In order to enable him to exit the communications task without losing the queue data, an arrangement is employed whereby this data can be entered on to the communications program diskette prior to termination of a communications session.
    • 在包括通信设备的文本处理器中,诸如打字任务和通信任务等不同的任务从不同的程序软盘输入到机器中。 由于每个都被输入,鉴于主存储器空间有限,所以它覆盖了与先前任务相关的主存储器中的控制数据。 在通信会话中,操作员必须在主存储器中的通信前台控制(CFC)和通信背景控制(CBC)块的控制下建立用于发送的文档队列。 如果操作员在完成任务之前要求终止这个任务,他的队列数据将被丢弃,因为与输入的新任务相关的控制数据被覆盖,所以在返回通信任务时,他必须从头开始。 为了使他能够在不丢失队列数据的情况下退出通信任务,采用一种布置,由此可以在通信会话结束之前将该数据输入到通信程序盘。
    • 8. 发明授权
    • Timer driven display updating
    • 定时器驱动显示更新
    • US4443863A
    • 1984-04-17
    • US274351
    • 1981-06-16
    • Dennis G. BuschRobert J. GrafeGary E. Leikam
    • Dennis G. BuschRobert J. GrafeGary E. Leikam
    • G06F3/06G06F3/14G06F3/153G06F5/06G06F13/00G06F13/42G09G5/00H04L29/12
    • G06F3/153G06F13/4226
    • A data communications system for asynchronous communication having at least two data transmit/receive terminals wherein the display is periodically updated with new send or receive data. In the receive mode the data is accumulated in a receive buffer for a predetermined time interval and then transferred into a text storage buffer which then activates a display access method to process the stored data and update the display. The display access method then goes into an "idle" mode and waits for the next transfer of data which does not occur until the predetermined time interval has expired. In the transmit mode the send data is transmitted without a delay but the display is updated after the predetermined time interval has expired.
    • 一种用于具有至少两个数据发送/接收终端的用于异步通信的数据通信系统,其中所述显示器使用新的发送或接收数据周期性地更新。 在接收模式下,数据以预定的时间间隔累积在接收缓冲器中,然后传送到文本存储缓冲器中,然后激活显示访问方法以处理所存储的数据并更新显示。 然后,显示访问方法进入“空闲”模式,并且等待直到预定时间间隔到期之前才发生的数据的下一个传送。 在发送模式下,发送数据没有延迟地发送,但是在预定时间间隔到期之后更新显示。