On 03/17/2015 03:45 AM, Christian Corti wrote:
  This has absolutely *nothing* to do with NTSC or PAL
(or SECAM or
 whatever). NTSC etc. are colour encoding standards and don't describe in
 any way how a image signal is generated (fields, syncs, timing). They
 only describe how to put colour information into the signal. 
Regardless, isn't this discussed in detail in the "Understanding the
Apple II" books by Jim Sather?
--Chuck