18F26K42 TMR1 Interrupt troubles

[richard]

your code would toggle led @32mS intervals , its a bit hard to see .
I can't compile pbp3 for this chip but can say that these settings work in xc8

#CONFIG
    CONFIG FEXTOSC = OFF               
    CONFIG RSTOSC = HFINTOSC_64MHZ       
    CONFIG CLKOUTEN = OFF                
    CONFIG PR1WAY = OFF                    
    CONFIG CSWEN = ON                    
    CONFIG FCMEN = OFF                    
    CONFIG MCLRE = INTMCLR               
    CONFIG PWRTS = PWRT_OFF                
    CONFIG MVECEN = OFF                   
    CONFIG IVT1WAY = OFF                
    CONFIG LPBOREN = OFF               
    CONFIG BOREN = OFF                    
    CONFIG BORV = VBOR_245                
    CONFIG ZCD = OFF                    
    CONFIG PPS1WAY = OFF               
    CONFIG STVREN = OFF                    
    CONFIG DEBUG = OFF                  
    CONFIG XINST = OFF                    
    CONFIG WDTCPS = WDTCPS_31            
    CONFIG WDTE = OFF                   
    CONFIG WDTCWS = WDTCWS_7            
    CONFIG WDTCCS = LFINTOSC           
    CONFIG BBSIZE = BBSIZE_512            
    CONFIG BBEN = OFF                    
    CONFIG SAFEN = OFF                    
    CONFIG WRTAPP = OFF                    
    CONFIG WRTB = OFF                   
    CONFIG WRTC = OFF                    
    CONFIG WRTD = OFF                    
    CONFIG WRTSAF = OFF                    
    CONFIG LVP = OFF                    
    CONFIG CP = OFF                        
#ENDCONFIG
  
'Defines, Includes, and Constants-----------------------------------------------
DEFINE OSC 64                                   ' Calibrate PBP to 64MHz clock
OSCFRQ = 8                              ' Set system clock to 64MHz internal
OSCCON1 = $60
on interrupt goto INC_TICK
'Direction----------------------------------------------------------------------
TRISA.1 = 0
'Alias---------------------------------------------------------------------------
LED    VAR LATA.1
'Variables----------------------------------------------------------------------
'Initialize Registers----------------------------------------------------------------------
Initilize:  
    ANSELA   = 0                      ' Set digital
    
     LED = 0
   
    INTCON0.7 = 1                                      'Enable global int
    T1CON = $35                                          'Prescale 1:8; enable the TMR1
   
    T1CLK = 1                                           'Clock Source Fosc/4
    
    
    PIR4.0 = 0                                             'Clear the Int flag
    PIE4.0 = 1                                             'Enable timer int
    
                                        'Start the timer 
C0UNTER VAR BYTE   
   
'Code---------------------------------------------------------------------------  
Main:  
    pause 1 
    Goto Main
'----- INTERRUPT CODE -------------------
Disable
INC_TICK:
         COUNTER=COUNTER+1
         IF COUNTER==31 THEN
         LED=!LED           ;TOGGLE LED ONCE PER SEC
         COUNTER=0
         ENDIF
         
         PIR4.0 = 0
         
         Resume
enable