From Unofficial QEdit Wiki Guide
Syntax: stack_push register1
- register1 = Value of register to push to stack.
Used to store a registers value into the stack so that the register can be freed up for another use.
100: leti R1, 0000000A //Set R1 to 10 window_msg 'R1 = <r1>' stack_push R1 //Push the value of R1 to the stack clear R1 add_msg 'R1 = <r1>' //R1 now is set to 0 stack_pop R1 //Retrieve value from stack and set R1 to value. Remember, when pushing and popping stacks are Last In First Out (LIFO) add_msg 'R1 = <r1>' //R1's value has now been restored to 10 winend ret