GETIN que

[Cunnah]

Hello!

So I am working on player input using the GETIN function and I have noticed that there is a que of inputs. The issue is that it appears that every time I call my movement command it stores all the inputs between ticks (the game is tick based). Is there a way to ensure that the que is empty or to only take the first input?

[JimmyDansbo]

You could ensure that you empty the que every time you have read a character.

Quote

WAIT_FOR_INPUT:

jsr GETIN

beq WAIT_FOR_INPUT ; keep reading while GETIN returns 0

sta Keyboard_value ; Store the first value

EMPTY_BUFFER:

jsr GETIN

bne EMPTY_BUFFER ; Keep reading while buffer contains characters

 

[Elektron72]

GETIN returns a 0 if there are no more inputs in the queue. Therefore, to take only the first input, call it repeatedly until it returns 0 to empty the queue.