页码 概述................................................................................ 3 SCSI 背景 ...................................................................... 4 结构图.............................................................................. 5 引脚说明.............................................................................. 4.1 微处理器接口信号 ........................................................ 6 4.2 SCSl 接口信号 ................................................................ 8 电气特性............................................................................. 9 内部寄存器............................................................................. 6.0 概述............................................................................. 10 6.1 数据寄存器.................................................................................. .................................................................. .................................................................. .................................................................. .................................................................. .................................................................. .................................................................. .................................................................. .................................................................. .................................................................. .................................................................. 10 6.1.1 当前 SCSI 数据寄存器.................. ... 10 6.1.3 输入数据寄存器 ...................................................... 11 6.2 发起者命令寄存器 ...................................................... 11 6.3 模式寄存器 .............................................................. 13 6.4 目标命令寄存器 ...................................................... 14 6.5 当前 SCSI 总线状态寄存器 ............................................. 15 6.6 选择启用寄存器 ..“ ................ ” ...................................... 15 6.7 总线和状态寄存器 ...................................................... 15 6.8 DMA 寄存器 ............................................................. 16 6.8.1 启动 DMA 发送 ............................................................. 16 6.8.2 启动 DMA 目标接收 ............................................................. 17 6.8.3 启动 DMA 发起者接收 ............................................................. 17 6.9 复位奇偶校验 / 中断 ............................................................. 17 片上 SCSI 硬件支持 ............................................................. 18 中断 ............................................................................. . 8.1 选择/重新选择 ................................................................ 19 8.2 处理结束（EOP）中断 ...................................................... 20 8.3 SCSI 总线复位 .............................................................. 21 8.4 奇偶校验错误 ................................................................ 21 8.5 总线相位不匹配 ................................................................ 22 8.6 BSY 丢失 ...................................................................... 22