| 摘要 |
inspecting a state(active/inactive) of bus busy signal and waiting until it is inactive; inspecting a bus busy signal after activating a bus request portion of a bus grant; returning after inactivating all bus grant if a bus busy signal is activated; inspecting the state of a bus request if a bus busy is inactive; keeping present bus grant if a bus request is active, or returning after inactivating all bus grant if bus request is inactive. It prevents a problem induced by noise of a VME bus line.
|
