Thanks mister_e!

I will try to reprogram the interrupthandler without using GOSUB.

The on interrupt goto statement is written in a GOSUB init: funktion which is called befor the main: loop
'--------------------------------------------------------------------------
inter_default:
on interrupt goto inter
return
'--------------------------------------------------------------------------

The reenabeling of interrupt is done in this two funktions:
'--------------------------------------------------------------------------
int_ende: 'Interrupt Ende

z1_tmp=10
z2_tmp=10
z3_tmp=10
z4_tmp=10

resume main_ende
enable

'--------------------------------------------------------------------------
main_ende:
pause 10
goto main