diff --git a/asm/readKeyInput.s b/asm/readKeyInput.s
deleted file mode 100644
index 50e63e38..00000000
--- a/asm/readKeyInput.s
+++ /dev/null
@@ -1,54 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start ReadKeyInput
-ReadKeyInput: @ 0x0801D6C0
-	push {lr}
-	ldr r0, _0801D6D4 @ =0x04000130
-	ldrh r0, [r0]
-	ldr r1, _0801D6D8 @ =0x000003FF
-	bics r1, r0
-	ldr r0, _0801D6DC @ =gUnk_03000FF0
-	bl sub_0801D6E0
-	pop {pc}
-	.align 2, 0
-_0801D6D4: .4byte 0x04000130
-_0801D6D8: .4byte 0x000003FF
-_0801D6DC: .4byte gUnk_03000FF0
-
-
-	thumb_func_start sub_0801D6E0
-sub_0801D6E0: @ 0x0801D6E0
-	push {lr}
-	adds r2, r0, #0
-	ldrh r0, [r2]
-	adds r3, r1, #0
-	bics r3, r0
-	strh r3, [r2, #2]
-	cmp r1, r0
-	bne _0801D70A
-	ldrb r0, [r2, #7]
-	subs r0, #1
-	strb r0, [r2, #7]
-	lsls r0, r0, #0x18
-	cmp r0, #0
-	bne _0801D704
-	movs r0, #4
-	strb r0, [r2, #7]
-	strh r1, [r2, #4]
-	b _0801D710
-_0801D704:
-	movs r0, #0
-	strh r0, [r2, #4]
-	b _0801D710
-_0801D70A:
-	movs r0, #0x14
-	strb r0, [r2, #7]
-	strh r3, [r2, #4]
-_0801D710:
-	strh r1, [r2]
-	pop {pc}
diff --git a/linker.ld b/linker.ld
index c7f40ab1..58006a85 100644
--- a/linker.ld
+++ b/linker.ld
@@ -319,7 +319,7 @@ SECTIONS {
 		src/_dmaFill32.o(.text);
 		asm/sub_0801D630.o(.text);
 		asm/sub_0801D66C.o(.text);
-		asm/readKeyInput.o(.text);
+		src/input.o(.text);
 		asm/code_0801D714.o(.text);
 		asm/code_0801D79C.o(.text);
 		/* enemies */
diff --git a/src/input.c b/src/input.c
new file mode 100644
index 00000000..df5b2290
--- /dev/null
+++ b/src/input.c
@@ -0,0 +1,44 @@
+#include "global.h"
+#include "entity.h"
+
+typedef struct {
+    u16 field_0x0;
+    u16 field_0x2;
+    u16 field_0x4;
+    u8 field_0x6;
+    u8 field_0x7;
+} Input;
+
+void StoreKeyInput(Input *pkeyInput, u32 ioKeyInput);
+
+extern Input gUnk_03000FF0;
+
+void ReadKeyInput(void)
+{
+    u32 reg = ~*(u16*)0x04000130 & 0x3FF;
+    Input* input = &gUnk_03000FF0;
+    StoreKeyInput(input, reg);
+}
+
+void StoreKeyInput(Input *input, u32 ioKeyInput)
+{
+  u32 difference;
+  u32 temp = input->field_0x0;
+  
+  difference = ioKeyInput & ~temp;
+  input->field_0x2 = difference;
+  if (ioKeyInput == temp) {
+    if (--input->field_0x7 == 0) {
+      input->field_0x7 = 4;
+      input->field_0x4 = ioKeyInput;
+    }
+    else {
+      input->field_0x4 = 0;
+    }
+  }
+  else {
+    input->field_0x7 = 0x14;
+    input->field_0x4 = difference;
+  }
+  input->field_0x0 = ioKeyInput;
+}
\ No newline at end of file