// T0CS FOSC/4; T0CKPS 1:64; T0ASYNC synchronised;
// TMR0H 155;
// TMR0L 0;
// T0OUTPS 1:1; T0EN enabled; T016BIT 8-bit;
For the K40 in 8-bit mode I don't see how that gets you 10ms @ 16MHz clock

Doesn't that get you 156 x 64 x 250ns = 2.496ms ?