公开(公告)号：AT75865T

公开(公告)日：1992-05-15

申请号：AT87118542

申请日：1987-12-15

Applicant: IBM

Inventor： CONCILIO IAN ANTHONY ,  HAWTHORNE JEFFREY ALAN ,  HEATH CHESTER ASBURY ,  LENTA JORGE EDUARDO ,  NGUYEN LONG DUY

IPC: G06F13/28 ,  G06F13/30 ,  G06F13/36 ,  G06F13/362 ,  G06F13/374

Abstract: A computer system is coupled to peripherals having their own DMA channel arbiter and peripherals having no arbiter. A separate arbitration unit, controlled directly by the CPU, is provided to arbitrate on behalf of peripherals having no arbiter. The CPU can thus freely assign different arbitration levels to such peripherals, and can instruct the arbitration unit to simultaneously arbitrate on different arbitration levels or for two or more DMA channels.

公开(公告)号：IN172637B

公开(公告)日：1993-10-30

申请号：IN179DE1988

申请日：1988-03-09

Applicant: IBM

Inventor： LENTA JORGE EDUARDO ,  NGUVEN LONG DUY ,  CONCILIO IAN ANTHONY ,  HEATH CHESTAR ASBURY ,  HAWTHORNE JEFFREY ALAN

IPC: G06F7/00 ,  G06F15/00

公开(公告)号：GB2202975B

公开(公告)日：1991-09-25

申请号：GB8728921

申请日：1987-12-10

Applicant: IBM

Inventor： CONCILIO IAN ANTHONY ,  HAWTHORNE JEFFREY ALAN ,  HEATH CHESTER ASBURY ,  LENTA JORGE EDUARDO ,  NGUYEN LONG DUY

IPC: G06F13/30 ,  G06F13/28 ,  G06F13/36 ,  G06F13/362 ,  G06F13/374

Abstract: A computer system is coupled to peripherals having their own DMA channel arbiter and peripherals having no arbiter. A separate arbitration unit, controlled directly by the CPU, is provided to arbitrate on behalf of peripherals having no arbiter. The CPU can thus freely assign different arbitration levels to such peripherals, and can instruct the arbitration unit to simultaneously arbitrate on different arbitration levels or for two or more DMA channels.

公开(公告)号：HK65392A

公开(公告)日：1992-09-11

申请号：HK65392

申请日：1992-09-03

Applicant: IBM

Inventor： CONCILIO IAN ANTHONY ,  HAWTHORNE JEFFREY ALAN ,  HEATH CHESTER ASBURY ,  LENTA JORGE EDUARDO ,  NGUYEN LONG DUY

IPC: G06F13/30 ,  G06F13/28 ,  G06F13/36 ,  G06F13/362 ,  G06F13/374

Abstract: A computer system is coupled to peripherals having their own DMA channel arbiter and peripherals having no arbiter. A separate arbitration unit, controlled directly by the CPU, is provided to arbitrate on behalf of peripherals having no arbiter. The CPU can thus freely assign different arbitration levels to such peripherals, and can instruct the arbitration unit to simultaneously arbitrate on different arbitration levels or for two or more DMA channels.

公开(公告)号：DE3778877D1

公开(公告)日：1992-06-11

申请号：DE3778877

申请日：1987-12-15

Applicant: IBM

Inventor： CONCILIO IAN ANTHONY ,  HAWTHORNE JEFFREY ALAN ,  HEATH CHESTER ASBURY ,  LENTA JORGE EDUARDO ,  NGUYEN LONG DUY

IPC: G06F13/28 ,  G06F13/30 ,  G06F13/36 ,  G06F13/362 ,  G06F13/374

Abstract: A computer system is coupled to peripherals having their own DMA channel arbiter and peripherals having no arbiter. A separate arbitration unit, controlled directly by the CPU, is provided to arbitrate on behalf of peripherals having no arbiter. The CPU can thus freely assign different arbitration levels to such peripherals, and can instruct the arbitration unit to simultaneously arbitrate on different arbitration levels or for two or more DMA channels.

公开(公告)号：GB2202975A

公开(公告)日：1988-10-05

申请号：GB8728921

申请日：1987-12-10

Applicant: IBM

Inventor： CONCILIO IAN ANTHONY ,  HAWTHORNE JEFFREY ALAN ,  HEATH CHESTER ASBURY ,  LENTA JORGE EDUARDO ,  NGUYEN LONG DUY

IPC: G06F13/30 ,  G06F13/28 ,  G06F13/36 ,  G06F13/362 ,  G06F13/374

Abstract: A computer system is coupled to peripherals having their own DMA channel arbiter and peripherals having no arbiter. A separate arbitration unit, controlled directly by the CPU, is provided to arbitrate on behalf of peripherals having no arbiter. The CPU can thus freely assign different arbitration levels to such peripherals, and can instruct the arbitration unit to simultaneously arbitrate on different arbitration levels or for two or more DMA channels.