Hi Kevin

Have a look for the include file for the pic you are using, in this case 
16f877.inc and open it in notepad, it should look like the following.

;****************************************************************
;*  16F877.INC                                                  *
;*                                                              *
;*  By        : Leonard Zerman, Jeff Schmoyer                   *
;*  Notice    : Copyright (c) 2003 microEngineering Labs, Inc.  *
;*              All Rights Reserved                             *
;*  Date      : 11/07/03                                        *
;*  Version   : 2.45                                            *
;*  Notes     :                                                 *
;****************************************************************
        NOLIST
    ifdef PM_USED
        LIST
        include 'M16F87x.INC'   ; PM header
        device  pic16F877, xt_osc, wdt_on, pwrt_on, lvp_off, protect_off
        XALL
        NOLIST
    else
        LIST
        LIST p = 16F877, r = dec, w = -302
        INCLUDE "P16F877.INC"   ; MPASM  Header
        __config _XT_OSC & _WDT_ON & _PWRTE_ON & _LVP_OFF & _CP_OFF
        NOLIST
    endif
        LIST

What you need to do is edit the text and change it from xt to hs watch case 
sensitivity if you are using MPASM

Richard

----- Original Message ----- 
From: "Kev Pearce (kevp.com)" <lists@kevp.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Wednesday, November 30, 2005 10:16 AM
Subject: Re: [PIC] I Can't get a 16F877 to run at 20MHz...

> Then it, failed then worked..... I then realised for some reason each time 
> I reload a new HEX file in the mikroe picusb1 programmer software it 
> resets the oscialltor mode to XT!!! How annoying! Tried the lastest 
> release no different. I'll post on the mikroe forums to see if this can be 
> fixed.
> 
-- 
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