公开(公告)号：US5131082A

公开(公告)日：1992-07-14

申请号：US364931

申请日：1989-06-09

申请人： Francis M. Bonevento ,  Douglas R. Chisholm ,  Sammy D. Dodds ,  Dhruvkumar M. Desai ,  Ernest N. Mandese ,  Andrew B. McNeill ,  Richard N. Mendelson

发明人： Francis M. Bonevento ,  Douglas R. Chisholm ,  Sammy D. Dodds ,  Dhruvkumar M. Desai ,  Ernest N. Mandese ,  Andrew B. McNeill ,  Richard N. Mendelson

IPC分类号： G06F13/12

CPC分类号： G06F13/126

摘要： A command interface includes ports for transferring information between a host processor and at least one intelligent subsystem which may have attached devices. A Command Interface port receives either a direct command or an indirect command from the host processor, which commands are indicative of a type of operation to be performed by the one subsystem or an attached device. An Attention port receives a code from the host processor which is indicative of which one of the direct command or the indirect command is received at the Command Interface port, and which is also indicative of which of the one intelligent subsystem or a device is to execute the command. A command busy/status port receives a code from the one intelligent subsystem which is indicative of whether or not the Command Interface port and the Attention port are busy, and whether or not the one intelligent subsystem is accepting or rejecting commands. The host processor can read this port without altering or updating the code.

公开(公告)号：US5170471A

公开(公告)日：1992-12-08

申请号：US818654

申请日：1992-01-06

申请人： Francis M. Bonevento ,  Douglas R. Chrisholm ,  Sammy D. Dodds ,  Dhruvkumar M. Desai ,  Ernest N. Mandese ,  Andrew B. McNeill ,  Richard N. Mendelson

发明人： Francis M. Bonevento ,  Douglas R. Chrisholm ,  Sammy D. Dodds ,  Dhruvkumar M. Desai ,  Ernest N. Mandese ,  Andrew B. McNeill ,  Richard N. Mendelson

IPC分类号： G06F13/12

CPC分类号： G06F13/126

摘要： A Command interface includes ports for transferring information between a host processor and at least one intelligent subsystem which may have attached devices. A Command Interface port receives either a direct command or an indirect command from the host processor, which commands are indicative of a type of operation to be performed by the one subsystem or an attached device. An Attention port receives a code from the host processor which is indicative of which one of the direct command or the indirect command is received at the Command Interface port, and which is also indicative of which of the one intelligent subsystem or a device is to execute the command. A command busy/status port receives a code from the one intelligent subsystem which is indicative of whether or not the Command Interface port and the Attention port are busy, and whether or not the one intelligent subsystem is accepting or rejecting commands. The host processor can read this port without altering or updating the code.

摘要翻译： 命令接口包括用于在主机处理器和至少一个可能具有连接设备的智能子系统之间传送信息的端口。 命令接口端口接收来自主处理器的直接命令或间接命令，哪些命令指示要由一个子系统或连接的设备执行的操作的类型。 注意端口接收来自主处理器的代码，其指示在命令接口端口处接收到直接命令或间接命令中的哪一个，并且还指示一个智能子系统或设备将执行哪一个 命令。 命令忙/状态端口从一个智能子系统接收指示命令接口端口和注意端口是否忙碌的代码，以及一个智能子系统是否接受或拒绝命令。 主机处理器可以读取此端口，而无需更改或更新代码。