公开(公告)号：BR9002710A

公开(公告)日：1991-08-20

申请号：BR9002710

申请日：1990-06-08

Applicant: IBM

Inventor： BONEVENTO FRANCIS M ,  CHISHOLM DOUGLAS R ,  DODDS SAMMY D ,  DESAI DHRUVKUMAR M ,  MANDESE ERNEST N ,  MCNEILL ANDREW B ,  MENDELSON RICHARD N

IPC: G06F13/12 ,  G06F15/20 ,  G06F13/00

Abstract: 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：PH31356A

公开(公告)日：1998-07-31

申请号：PH40473

申请日：1990-05-03

Applicant: IBM

Inventor： BONEVENTO FRANCIS M ,  CHISHOLM DOUGLAS R ,  DOODS SAMMY D ,  DESAI DHRUVKUMAR M ,  MANDESE ERNEST N ,  MCNEILL ANDREW B ,  MENDELSON RICHARD N

IPC: G06F13/12 ,  G06F13/24

Abstract: 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：BR9204660A

公开(公告)日：1993-06-22

申请号：BR9204660

申请日：1992-12-03

Applicant: IBM

Inventor： MCNEILL ANDREW B ,  WACHTEL EDWARD I

IPC: G06F13/10 ,  G06F13/38 ,  G06F13/20

公开(公告)号：CA2018073A1

公开(公告)日：1990-12-19

申请号：CA2018073

申请日：1990-06-01

Applicant: IBM

Inventor： DIXON JERRY D ,  KEENER DON S ,  LOCKER HOWARD J ,  MARAZAS GERALD A ,  MCNEILL ANDREW B ,  NEWSOM THOMAS H ,  OSBORN NEAL A

IPC: G06F13/14 ,  G06F12/06

Abstract: Apparatus for assigning addresses to devices connected to an SCSI bus (10). A second configure bus (15) interconnects address assignable devices on the SCSI bus. The assignable devices may be used in a mixed system where some devices have fixed non-assignable addresses. The master device in the SCSI bus transmits configuration commands over the configuration bus and addresses for assignment over the SCSI bus. Acknowledgements are received back from a device which has accepted an address. Once configured with an address, the device propagates subsequent configuration commands to an adjacent device.