[QUOTE=MaxiBoost;Yes ,
I must write my hardware capture command ,
but question is HOW
I understand your comment ,
if I write that codes and If I use 4mhz osc ,
I can easly and faster read on my lcd 1000 to 9000 rpm ?

[/QUOTE]

How ...

Take 876 Datasheet on $ 8.0, 8.1 ... CCP modules ...

an see which registers you have to deal with ...

For a first trial ... i suggest you to poll the interrupt flag rather than use an interrupt ...

for speed ... Haha ... the time is that of 1 rotation or time between two sparks ( half a rotation ...if i'm right !!! )

Alain