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    • 1. 发明授权
    • Data chaining mechanism for SCSI devices
    • SCSI设备的数据链接机制
    • US5293624A
    • 1994-03-08
    • US63637
    • 1993-05-19
    • Gustavo AndradeMathew GulickGerald Katzung
    • Gustavo AndradeMathew GulickGerald Katzung
    • G06F3/06G06F12/02
    • G06F3/0601G06F2003/0697
    • A mechanism for exchanging information between SCSI devices which allows for specifying multiple source or destination buffers. The mechanism includes a first apparatus for generating at least one move instruction which when executed by the SCSI manager either writes or reads the specified number of bytes to or from that buffer address and subsequently adds the offset field value to the buffer address to create a current buffer address. The current buffer address and the buffer address may be non-contiguous. The mechanism also has a second apparatus for generating at least one looping instruction by which the SCSI manager branches the offset number of instructions until the number is exhausted. This allows the SCSI manager to repeat instructions. During each repetition of the move instruction, the buffer address location gets incremented by the value in the offset field. This incrementing allows buffer locations to be accessed that are non-contiguous; thus, multiple source and destinations can be created and they can be non-contiguous.
    • 用于在SCSI设备之间交换信息的机制,其允许指定多个源或目的地缓冲器。 该机制包括用于产生至少一个移动指令的第一装置,当SCSI管理器执行该指令时,向或者从该缓冲器地址写入或读取指定数量的字节,并且随后将偏移字段值添加到缓冲器地址以创建电流 缓冲区地址。 当前缓冲区地址和缓冲区地址可能不连续。 该机制还具有用于生成至少一个循环指令的第二装置,通过该指令,SCSI管理器分支指令的偏移数,直到数字被耗尽。 这允许SCSI管理器重复指令。 在移动指令的每次重复期间,缓冲区地址位置增加偏移字段中的值。 这种增量允许访问不连续的缓冲区位置; 因此,可以创建多个源和目的地,并且它们可以是不连续的。