Create development.md

Author: pinballpower

doc/development.md

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+# Development tips & tricks
+
+## Platform
+
+It's often best to develop on a modern PC instead of a Raspberry Pi. DMDReader has been developed mostly on Windows. Compilation is a lot faster on a PC than on a Raspberry Pi.
+
+## Memory
+
+Note that DMDReader uses some C++ frameworks. Modern C++ frameworks use a lot of templates. The good thing about this: You can write very clean code that is also very fast. 
+The bad thing: the compiler has a lot of work to do to deal with all these templates. This means on a slow system it will take some time to compile it. You also need a lot of
+memory. Use a system with at least 2GB of RAM. If you run muliple jobs in parallel, have at least 2GB RAM physical RAM per job.
+
+## Timing
+
+A real pinball machine delievers DMD frames at a fixed rate - independent if something has been changed or not. DMDReader (and even the RP2040 hardware interface for real pinballs) 
+deduplicate frames. By default, a frame is only being processed if something has changes. This can create problems with some processors (e.g. the VNI module) - that expect frames at
+a fixed rate. 
+There are some workarounds to deal with this: