Timer problem

I'm having a problem with the timers on the 18F4550. I wrote the below code to test the timer, but im getting unexpected results:

Code:

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Define OSC 48   

DEFINE LCD_DREG      PORTD
DEFINE LCD_DBIT      4
DEFINE LCD_RSREG    PORTC 
DEFINE LCD_RSBIT    1
DEFINE LCD_EREG      PORTC                           
DEFINE LCD_EBIT      2
DEFINE LCD_BITS      4                             
DEFINE LCD_LINES    2                         
DEFINE LCD_COMMANDUS 2000                           
DEFINE LCD_DATAUS    50                                   

temp var byte

' Timer 0: 8-Bit, 1:256 prescaler, 128uS/tick
T0CON=%11010111           

TMR0L=0
pauseus 2048
temp=TMR0L
lcdout $FE,1,$FE,2,#temp

loop: goto loop

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At 128uS per tick of the timer, i'd expect a result of about 8, however I get 95.

I have a 4Mhz crystal, and heres my config:

Code:

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        __CONFIG    _CONFIG1L, _PLLDIV_1_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
        __CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H
        __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
        __CONFIG    _CONFIG3H, _PBADEN_OFF_3H
        __CONFIG    _CONFIG4L, _LVP_OFF_4L & _ICPRT_OFF_4L & _XINST_OFF_4L

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Quote:

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Originally Posted by Kamikaze47

At 128uS per tick of the timer, i'd expect a result of about 8, however I get 95.

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At 48Mhz...
Each MCU instruction cycle = .083us ( 1/ (48mhz/4) )
.083us * 256 for the Timer 0 prescaler = 21.3us
2048 us pause / 21.3 us per T0 tick = 96

*slaps forehead*

I'm not sure how I ended up with 128uS/tick... I must have worked it out on a 8Mhz clock instead of 48Mhz.

thanks skimask