This is my config now

Code:
@   device  pic16F648A, hs_osc, wdt_off, mclr_on, lvp_off, protect_off

Is it only to change "hs_osc" to "xt_osc" to use the Internal Oscillator?
Or how should I do?

Code:
@   device  pic16F648A, xt_osc, wdt_off, mclr_on, lvp_off, protect_off