Each data is read by J11 CPU event by event and buffered. Buffered data is transferred to the Micro VAX II computer and then processed. Data acquisition of event by event and DMA transfer can be carried out simultaneously. Usually ACC has a higher priority. Most part of the CPU time on the host processor can be utilized for on-line data analysis.
Every hardware is commercially available.
It is called by QIO system routines and it runs as a part of the operating system.