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Questions about Bus Mastering
I know the CPU boards are designed to work with "Bus Mastering"; I've realized I'm not 100% what "Bus Mastering" means or how it works.
My take on it and please correct me if I'm wrong.
- There can be several CPU cards in the system however only one can be active on the S-100 bus.
- That something in the monitor code on each boards controls if the board is the master or not?
Assuming I have this somewhat correct then I have a couple questions:
- On power up how does the system decide which CPU board is the master?
- How does the master semaphore get passed between boards (or is this even possible)?