Can Timer0 be used instead of Timer1 in DT Blinky?

[Demon]

Is it possible to use Timer0 instead of Timer1 on a 18F4550 using Darrel's blinky program?

@   __CONFIG    _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
@   __CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H
@   __CONFIG    _CONFIG2L, _PWRT_OFF_2L & _BOR_ON_2L & _BORV_1_2L & _VREGEN_ON_2L
@   __CONFIG    _CONFIG2H, _WDT_OFF_2H
@   __CONFIG    _CONFIG3H, _CCP2MX_ON_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _MCLRE_ON_3H
@   __CONFIG    _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _ICPRT_OFF_4L & _XINST_OFF_4L

DEFINE OSC 48
    ADCON1 = %00001111
    INTCON2 = %00000000

    T0CON = %10000000                   ; Prescaler = 2
'    T0CON = %10000001                   ; Prescaler = 4
'    T0CON = %10000010                   ; Prescaler = 8
'    T0CON = %10000011                   ; Prescaler = 16
'    T0CON = %10000100                   ; Prescaler = 32
'    T0CON = %10000101                   ; Prescaler = 64
'    T0CON = %10000110                   ; Prescaler = 128
'    T0CON = %10000111                   ; Prescaler = 256
'      bit 7 TMR0ON: Timer0 On/Off Control bit
'              1 = Enables Timer0
'              0 = Stops Timer0
'      bit 6 T08BIT: Timer0 8-Bit/16-Bit Control bit
'              1 = Timer0 is configured as an 8-bit timer/counter
'              0 = Timer0 is configured as a 16-bit timer/counter
'      bit 5 T0CS: Timer0 Clock Source Select bit
'              1 = Transition on T0CKI pin
'              0 = Internal instruction cycle clock (CLKO)
'      bit 4 T0SE: Timer0 Source Edge Select bit
'              1 = Increment on high-to-low transition on T0CKI pin
'              0 = Increment on low-to-high transition on T0CKI pin
'      bit 3 PSA: Timer0 Prescaler Assignment bit
'              1 = TImer0 prescaler is NOT assigned. Timer0 clock input bypasses prescaler.
'              0 = Timer0 prescaler is assigned. Timer0 clock input comes from prescaler output.
'      bit 2-0 T0PS2:T0PS0: Timer0 Prescaler Select bits
'              111 = 1:256 Prescale value
'              110 = 1:128 Prescale value
'              101 = 1:64 Prescale value
'              100 = 1:32 Prescale value
'              011 = 1:16 Prescale value
'              010 = 1:8 Prescale value
'              001 = 1:4 Prescale value
'              000 = 1:2 Prescale value

INCLUDE "DT_INTS-18.bas"            ' Base Interrupt System
INCLUDE "ReEnterPBP-18.bas"         ' Include if using PBP interrupts

ASM
INT_LIST  macro    ; IntSource,        Label,  Type, ResetFlag?
        INT_Handler   TMR0_INT,  _ToggleLED,   PBP,  yes
    endm
    INT_CREATE                      ; Creates the interrupt processor
ENDASM

DEFINE  LCD_DREG      PORTD
DEFINE  LCD_DBIT      4
DEFINE  LCD_RSREG     PORTE
DEFINE  LCD_RSBIT     0
DEFINE  LCD_EREG      PORTE
DEFINE  LCD_EBIT      1
DEFINE  LCD_BITS      4
DEFINE  LCD_LINES     2
DEFINE  LCD_COMMANDUS 1000
DEFINE  LCD_DATAUS    50

    TRISA = %00000000
    TRISB = %00000000
    TRISC = %00000000
    TRISD = %00000000
    TRISE = %00000000

LED1  VAR  PORTD.0
LED2  VAR  PORTD.1

@ INT_ENABLE  TMR0_INT              ; enable Timer 0 interrupts

    PAUSE 1500                      ' wait for PIC and LCD to stabilize
    LCDOUT  $FE,1,"Timer test Lab X1"

Main:
    TOGGLE LED2
    PAUSE 500
GOTO Main

ToggleLED:
     TOGGLE LED1
@ INT_RETURN
END

Darrel's blinky code works just fine at Prescaler 1 with Timer1 but I can't seem to get any variation in blink speed out of Timer0. I tried a gazillion combinations and I admit I'm not sure about the other settings in T0CON.

I don't have access to a scope right now and this desktop doesn't have enough memory to run Saleae from 1MHz and up.

LED2 was added to confirm I didn't screw up the PIC and it is blinking as expected. LED1 seems to be blinking very fast because it is just slightly paler than the other LEDs on the Lab X1 bargraph.

Or are the blinking so fast at any prescaler that I won't be able to see a difference? I was able to detect "very fast" blinking in Timer1 at 1:1 though.

Robert
PBP v2.60c