公开(公告)号：US5359468A

公开(公告)日：1994-10-25

申请号：US740755

申请日：1991-08-06

Applicant: Edward J. Rhodes ,  Daryl K. Adams ,  Clifford R. Berry ,  Ta-Lin Chang ,  David R. Lee

Inventor： Edward J. Rhodes ,  Daryl K. Adams ,  Clifford R. Berry ,  Ta-Lin Chang ,  David R. Lee

IPC: G11B20/10 ,  G11B20/14 ,  G11B20/18 ,  G11B27/36 ,  G11B5/09

CPC classification number: G11B20/1883 ,  G11B20/10 ,  G11B20/1866 ,  G11B27/36 ,  G11B20/1426 ,  G11B20/1879 ,  G11B2020/183 ,  G11B2220/90 ,  G11B2220/913

Abstract: In a digital data storage audio tape system having a host device interface unit, a main data buffer manager, a main data buffer, a processor, a data separator, a tape drive unit, and a read/write channel, this invention comprises a formatter providing track construction, encoding and decoding, error correction, and direct memory access of digital data transmitted between the host device unit and the tape drive unit and a frame buffer for buffering digital data for encoding and decoding, and error correction. The formatter is coupled between the main data buffer manager, via a direct memory access channel, and the read/write channel of the tape drive, and further is coupled to the frame buffer. The formatter is coupled to and responsive to instruction control by the processor in conjunction with instruction control of the tape drive unit by the processor.

Abstract translation: 在具有主机设备接口单元，主数据缓冲管理器，主数据缓冲器，处理器，数据分离器，磁带驱动单元和读/写通道的数字数据存储音频磁带系统中，本发明包括格式器 提供轨道构造，编码和解码，纠错以及在主机设备单元和磁带驱动单元之间传输的数字数据的直接存储器访问和用于缓冲用于编码和解码的数字数据的帧缓冲器和纠错。 格式器通过直接存储器存取通道和磁带驱动器的读/写通道耦合在主数据缓冲器管理器之间，并且还耦合到帧缓冲器。 格式器被耦合到并响应于处理器的指令控制，结合处理器对磁带机单元的指令控制。

公开(公告)号：US5734924A

公开(公告)日：1998-03-31

申请号：US111192

申请日：1993-08-27

Applicant: Yu-Ping Cheng ,  Ta-Lin Chang ,  Shih-Tsung Hwang

Inventor： Yu-Ping Cheng ,  Ta-Lin Chang ,  Shih-Tsung Hwang

IPC: G06F13/12 ,  G06F13/38 ,  G06F13/10

CPC classification number: G06F13/385 ,  G06F13/126

Abstract: A host adapter contains a RISC processor, a local memory, and a memory management unit that permits the RISC processor and a host computer system to access a local memory. The host computer system writes command descriptions directly into the local RAM. The RISC processor retrieves and processes the command descriptions. The local RAM may be divided into numbered command description blocks having a fixed size and format. In standard bus protocols, such as SCSI-2, block numbers are used as tag messages. Such tag messages allow the host adapter to quickly identify information used when an SCSI I/O request is resumed. The command description blocks may be linked into lists, including an active list containing command description blocks that are ready for the RISC processor and a free list containing command description blocks that are available for use by the host computer.

Abstract translation: 主机适配器包含RISC处理器，本地存储器以及允许RISC处理器和主机系统访问本地存储器的存储器管理单元。 主机系统将命令描述直接写入本地RAM。 RISC处理器检索和处理命令描述。 本地RAM可以被划分为具有固定大小和格式的编号命令描述块。 在标准总线协议（如SCSI-2）中，块号用作标签消息。 这样的标签消息允许主机适配器快速识别恢复SCSI I / O请求时所使用的信息。 命令描述块可以链接到列表中，包括包含用于RISC处理器的命令描述块的活动列表和包含可供主计算机使用的命令描述块的空闲列表。