1 files changed, 47 insertions, 0 deletions
diff --git a/src/input.asm b/src/input.asm
new file mode 100644
index 0000000..278b640
--- /dev/null
+++ b/src/input.asm
@@ -0,0 +1,47 @@
+section .bss
+    input_buffer resb 1
+
+section .text
+    global input
+    extern direction
+    extern exit
+
+input:
+    call read_input
+    call handle_input
+    ret
+
+handle_input:
+    mov al, byte [input_buffer]
+    cmp al, 'w'
+    je _input_up
+    cmp al, 's'
+    je _input_down
+    cmp al, 'a'
+    je _input_left
+    cmp al, 'd'
+    je _input_right
+    cmp al, 27 ; escape
+    je exit
+    ret
+
+_input_up:
+    mov byte [direction], 3
+    ret
+_input_down:
+    mov byte [direction], 1
+    ret
+_input_left:
+    mov byte [direction], 2
+    ret
+_input_right:
+    mov byte [direction], 0
+    ret
+
+read_input:
+    mov rax, 0           
+    mov rdi, 0           
+    mov rsi, input_buffer
+    mov rdx, 250          
+    syscall
+    ret