MCCD Mosaic Software Details

• set up mosaic screen
• set up mosaic size params and display them
• set up mosaic location params (lat, log, encoder positions) and display them
• make sure scanning params are withn range
• init GPIB
• move scanner to initial position
• check system time
• arm IRQ7
• determine initial coude position (depends on if we are starting a new mosaic or resuming a paused one) and move there.
• format fits header
• setup the camera
• if a new mosaic, initialize the tapes
• close shutter
• Loop:
• update fits header in Photometrics buffer
• call doscan:
• Move the scanner to the initial postion
• for first scan: write EOF to tapes
• Loop for #frames:
• if first frame:
• write FITS to tapes
• send EXPOSE cmd to camera
• snap with the FG
• if not first frame:
  • send readout-expose to camera
  • setup tape write, stuff time of last exposure into the buffer
  • start writing to tape
• if setalarm: setalarm (REPTIME)
• if wtalarm: wtalarm()
• set noalarm
• get time to write on tape later
• open shutter
• wait for exposure time
• close shutter
• step scanner
• if not 1st frame: wait for tape write to finish
• readout last frame and display on monitor
• write last frame to tape
• move scanner to center
• check irq7
• move to next mosaic tile and update parameters
• if not paused, update tape file #'s, etc.
• update display
• close shutter