Прерывания INT0 и INT1 работают, режимы "по фронту, по изменению" - работают.

Код:
$regfile = "STC_8H.DAT"                   ' STC registers list
$crystal = 11059200                       ' CPU clock frequence
$ramsize = &H400                          ' 1024
$romstart = &H0                           ' code starting address

$large

Dim Temp As Byte

P1ie = &B_0000_0100                       ' 1: Enable digital signal input
P1m1 = &B_0000_0000 : P1m0 = &B_0011_0000       ' Push-pull output mode
P1pu = &B_0000_0100                       ' 1: pull-up resistor

Test_out Alias P1.4
My_led Alias P1.5



P3ie = &B_0000_1100                       ' 1: Enable digital signal input     P3.3=INT1 P3.2=INT0
P3m1 = &B_0000_0000 : P3m0 = &B_0000_0000       '
P3pu = &B_0000_1100                       ' 1: pull-up resistor

On Int0 Int0_int                          'Initialise the INT0 Interrupt
'Priority Set Int0                         'set INT0 to the highest priority level (INT1 has by default the highest prio)

'It0 = 0                                   ' Enable INT0 rising and falling interrupt
It0 = 1                                   ' Enable INT0 falling edge interrupt

Enable Int0                               'enable the interrupt

Enable Interrupts


Test_out = 1

For Temp = 0 To 9
  My_led = 1
  Waitms 50

  My_led = 0
  Waitms 50
Next

Test_out = 0


Do
  Test_out = 1
  Waitms 90

  Test_out = 0
  Waitms 90
Loop

'------------------------------------
Int0_int:
  Incr Temp
  If Temp > 5 Then
    My_led = 1
    Waitms 50
    My_led = 0
    Temp = 0
  End If
Return