hi,
ein merker ist einfach eine hilfsvariable. isr: interrup service routine
bei Bascom sind im orner samples viele programmbeispie dabei, hier der ausschnitt zum timer interrupt:
Code:
'when the timer overflows, a flag named TOV0 in register TIFR is set
'You can use this to execute an ISR
'To reset the flag manual in non ISR mode you must write a 1 to the bit position
'in TIFR:
Set Tifr.1



'The following code shows how to use the TIMER0 in interrupt mode
'The code is block remarked with '(  en ')

'(

'Configute the timer to use the clock divided by 1024
Config Timer0 = Timer , Prescale = 1024

'Define the ISR handler
On Ovf0 Tim0_isr
'you may also use TIMER0 for OVF0, it is the same

Enable Timer0                                                 ' enable the timer interrupt
Enable Interrupts                                             'allow interrupts to occur
Do
   'your program goes here
Loop

'the following code is executed when the timer rolls over
Tim0_isr:
  Print "*";
Return

')
mfg jeffrey