COMMON RULES ON OPERATION MODES
RUN MODE: the board does what is needed to make SVT run
- only status reading and error bit clearing is allowed from VME
- VME operations that affect data flow are disallowed in hardware unless they are so disruptive that are detected immediately (e.g. board-reset or exit-run-mode)
-
TEST MODE = NOT(run mode)
- memories can be written and read
- all soft operation switches in VME registers can be changed
- data processing is halted, input data if any are kept in input FIFO
- input FIFO can be read from VME
- output data can be written from VME
- SPY buffers can be read