Char. LCD and 18F452 on 20 MHz not work

[skimask]

Problem is, if PLL enable with 4 MHz XTAL, or 20 MHz with osc config=HS then.

Might want to also keep in mind that the PLL doesn't work above 10Mhz. The max speed of the PIC is 40Mhz (10 x 4xPLL). Try as you might, you won't get the PIC to run at 160Mhz! (It would be nice, but it won't work )