EasyInput

Overview

EasyInput is used to handle keyboard input easily for games made in Easy68K assembly.
Note - EasyInput does not currently support more than one use of the macro.

How to Use

You have to first copy the file to your project directory then you can include the EasyInput.X68 file at the top of your source code using the following code.

INCLUDE 'EasyInput.X68'

Now you can using the "getKeyInput" macro in the following manner:

getKeyInput <WASD>

Following this macro you must use the "ifKey#" macros and "endIfKey" macros to encapsulate your code.

ifKey1
    ; Your code
endIfKey

The keys are read from left to right so "" will return W as 1, A as 2, S as 3, and D as 4. This means you can read anywhere from 1 to 4 inputs such as "" instead of "".

Here is the complete code for reading 4 key inputs:

getKeyInput <WASD>
ifKey1
    ; Your code for W
endIfKey
ifKey2
    ; Your code for A
endIfKey
ifKey3
    ; Your code for S
endIfKey
ifKey4
    ; Your code for D
endIfKey

Example Code

    INCLUDE 'EasyInput.x68'

    ORG    $1000

START:                  ; first instruction of program

inputLoop
    getKeyInput <WASD>
    ifKey1
        LEA     str1,A1
        MOVE.B  #13,D0
        TRAP    #15
    endIfKey
    ifKey2
        LEA     str2,A1
        MOVE.B  #13,D0
        TRAP    #15
    endIfKey
    ifKey3
        LEA     str3,A1
        MOVE.B  #13,D0
        TRAP    #15
    endIfKey
    ifKey4
        LEA     str4,A1
        MOVE.B  #13,D0
        TRAP    #15
    endIfKey

    MOVE.W  #$FF00,D1
    MOVE.B  #11,D0
    TRAP    #15

    BRA     inputLoop

    SIMHALT             ; halt simulator

str1    dc.b    'Key 1 Is Being Pressed.',0
str2    dc.b    'Key 2 Is Being Pressed.',0
str3    dc.b    'Key 3 Is Being Pressed.',0
str4    dc.b    'Key 4 Is Being Pressed.',0

    END    START        ; last line of source