2.2 Memory organisation

 

The RAID task uses several buffers in its memory:

• the TaskParamBlock at fixed address offset 0x10000. This block contains all run information, namely:
  • Status - RAID busy ?
  • Buffer - which of the RAID's Event Buffers is being processed (s. below)
  • VMEmaster
  • histAddress
  • EventAddress[kBUFFERS] - addresses of the Event Buffers
  • CurrentEvent
  • CurrentRun
  • LastEvent
  • LastRun
  • NumberOfEvents
  • RunParams - see Sec. 2.1

• two Event Buffers into which the FIC directs incoming data
• one buffer for the Pedestals of one RIO board
• one buffer for the Sigmas of one RIO board
• one ``output'' buffer for processed data
• one buffer for the histogram data which is initialized as a FORTRAN Common Block, see Sec. 4.1.