OK, when I intended to use the PIC16F876, I checked TMR1 operation with a short program (in Simulator)
Define CONFIG = 0x3d71
Dim et As Word
Dim testet As Word
Dim x As Byte
T1CON = %00110001 ' although bit functions are different, the same values set the same conditions in the 1519
TMR1H = 0...