View Single Post
Old 6th Mar 2006, 10:17 pm   #29
jjl
Octode
 
jjl's Avatar
 
Join Date: Jan 2003
Location: Ware, Herts. UK.
Posts: 1,082
Default Re: PC as a standard convertor

Nice work Kat.
The numbers in your modeline sound a bit odd, could you let us know what the number of active i.e. visible lines is supposed to be in a 405 frame?
Have you managed to get your NVIDIA card to output interlaced video?
You may have noticed that NVIDIA cards seem to need horizontal timing specified in multiples of 8 pixel clocks, not sure whether this applies to ATi and others.
I have an idea that I mentioned in an earlier post that might allow a single colour channel output (R, G or B) from a graphics card to be used to output 405 line composite video thus requiring minimal external hardware for dealing with syncs etc. I'll try to investigate this when I have enough spare moments.


John
jjl is offline