Do I have to use Table Reads & Writes to change the OSCSEN bit on a 18F452?

[Bruce]

Hi Jessey,

Yep. That's pretty much all there is to it.

This enables osc switching in config word: _OSCS_ON_1H.

T1CON.3 = 1 enables the Timer1 oscillator.

OSCCON.0 = 1 switches from whatever external primary osc you're using to the one on Timer1.

Switch to Timer1 osc: OSCCON.0 = 1
Switch to main osc: OSCCON.0 = 0

NOTE: Its not OSCCON0.0. It's OSCCON.0.