The 80517 and 80537 have more interrupts and priority is handled different compared to the 8051.

 

Enable interrupts:

ENABLE AD 'AD converter

ENABLE INT2|INT3|INT4|INT5|INT6        'external interrupt 2-6

ENABLE TIMER2EX                        'timer2 external reload

ENABLE CTF                                'compare timer interrupt

ENABLE SERIAL1                                'serial1 interrupt

 

 

 

Disable interrupts:

DISABLE AD 'AD converter

DISABLE INT2|INT3|INT4|INT5|INT6        'external interrupt 2-6

DISABLE TIMER2EX                        'timer2 external reload

DISABLE CTF                                'compare timer interrupt

DISABLE SERIAL1                                'serial1 interrupt

 

 

 

Selecting of priority:

PRIORITY SET|RESET  source , level

level can be 0,1,2 or 3.(0=lowest,3=highest)

 

source can be :

INT0/ADC/SERIAL1

TIMER0/INT2

INT0/INT3

TIMER1/CTF/INT4

SERIAL/INT5

TIMER2/INT6

Note that only one of the TRIPLE-pairs must be selected.

PRIORITY SET INT4,3  'will set INT4 to the highest priority.

When two ints occur with the same priority the first source in the list will be handled first. So when both TIMER1 and INT4 have the same priority, TIMER1 will be serviced first.

Look at a datasheet for more details.