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Yes, that is correct Matt. Camera control is performed by either CCDSoft or MaximDL. The only exception to this is when using a webcam as this uses Microsoft DirectShow.
So, if you operate a camera that is supported by either software package it will work. MaximDL is certainly the premium package when it comes to camera support. For example it supports the following cameras: Andor Technology, Apogee, Audine, Canon EOS, Cookbook CB245, DTA Scientific Instruments, Ethernaude, FLI, HiSIS 22/44, Lumenera, Meade DSI/LPI/Pictor, Nikon DSLR, Olympus DSLR, Optronics, Orion Starshoot, SAC, SBIG, Starfish, Starlight Xpress and Yankee Robotics. It can also support other cameras under the proviso that they're ASCOM compliant. This is achieved through camera plug-ins.
So, to cut a long story short - Yes. You can use PEMPro with a Meade DSI through MaximDL. There is no benefits for PEMPro to have direct support for a specific camera such as the DSI. Its easier for the software to remain autonomous and leave camera control API calls to software such as MaximDL or CCDSoft. Thus, you maybe waiting a long time for "direct" support.
The camera control package is used to take calibration images that you must interact with. i.e. one test is an exposure with no guiding enabled. You then select the star trails (from start to finish). PEMPro analyses this to work out camera rotation and arcsec/pixel combination. There are a few other tests which determine mount movement methods, not to mention the tracking of a star through the multiple worm cycles. The process is rather fool proof.
I should note that if you have a Takahashi mount, they don't support PEC. I don't know why. I know they track extremely smoothly and have a low PE... but when considering this, so does the ParamountME but it still has PEC support. ?weird?
Hope this helps.
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