公开(公告)号：JPS62102349A

公开(公告)日：1987-05-12

申请号：JP20979386

申请日：1986-09-08

Applicant: IBM

Inventor： AAKRE DAVID ELGAR ,  ABRAHAMSON DOUGLAS JOHN ,  BERGLUND NEIL CLAIR ,  BETTERMANN VINCENT ALFRED ,  HEIM LLOYD STEPHEN ,  MOE KENNETH ARDELLE

IPC: G06F13/14 ,  G06F12/06

公开(公告)号：DE3688277T2

公开(公告)日：1993-10-28

申请号：DE3688277

申请日：1986-09-16

Applicant: IBM

Inventor： AAKRE DAVID ELGAR ,  ABRAHAMSON DOUGLAS JOHN ,  BERGLUND NEIL CLAIR ,  BETTERMANN VINCENT ALFRED ,  HEIM LLOYD STEPHEN ,  MOE KENNETH ARDELLE

IPC: G06F13/14 ,  G06F12/06

Abstract: An automatic address assignment system (10) has a plurality of I/O devices (20,22,...M,28,30,...P(14) coupled to a bus. Each device contains a unique machine-readable identifier which is used to select the device for address assignment. The identifier is a binary bit string. Each bit position in the bit string is selected by the host in a serial manner with the host specifying which binary value is being solicited. All devices whose identifier digit matches the solicited value respond positively and remain in contention for address assignment. The other devices will not respond and drop out of contention for address assignment until the sequence is restarted from the first bit. After the bit sequence is completed, the address for that device is bused to the device, and the sequence is restarted from the first bit until all devices have been assigned an address.

公开(公告)号：DE3688277D1

公开(公告)日：1993-05-19

申请号：DE3688277

申请日：1986-09-16

Applicant: IBM

Inventor： AAKRE DAVID ELGAR ,  ABRAHAMSON DOUGLAS JOHN ,  BERGLUND NEIL CLAIR ,  BETTERMANN VINCENT ALFRED ,  HEIM LLOYD STEPHEN ,  MOE KENNETH ARDELLE

IPC: G06F13/14 ,  G06F12/06

Abstract: An automatic address assignment system (10) has a plurality of I/O devices (20,22,...M,28,30,...P(14) coupled to a bus. Each device contains a unique machine-readable identifier which is used to select the device for address assignment. The identifier is a binary bit string. Each bit position in the bit string is selected by the host in a serial manner with the host specifying which binary value is being solicited. All devices whose identifier digit matches the solicited value respond positively and remain in contention for address assignment. The other devices will not respond and drop out of contention for address assignment until the sequence is restarted from the first bit. After the bit sequence is completed, the address for that device is bused to the device, and the sequence is restarted from the first bit until all devices have been assigned an address.