From 2854acc73b31447b1898d9f59c85bb3e66c5903e Mon Sep 17 00:00:00 2001
From: Kavanaugh Latiolais <kav@pelo.tech>
Date: Thu, 1 Feb 2024 20:08:38 -0600
Subject: [PATCH] II-17: Initializing wCurKeys and wNewKeys

---
 src/part2/input.md           | 6 ++++++
 unbricked/bricks/main.asm    | 3 +++
 unbricked/collision/main.asm | 3 +++
 unbricked/functions/main.asm | 1 +
 unbricked/input/main.asm     | 5 +++++
 unbricked/objects/main.asm   | 1 +
 6 files changed, 19 insertions(+)

diff --git a/src/part2/input.md b/src/part2/input.md
index 67a99a32..c42d4712 100644
--- a/src/part2/input.md
+++ b/src/part2/input.md
@@ -29,6 +29,12 @@ First, let's set aside some room for the two variables that `UpdateKeys` will us
 Each variable must reside in RAM, and not ROM, because ROM is "Read-Only" (so you can't modify it).
 Additionally, each variable only needs to be one byte large, so we use `db` ("Define Byte") to reserve one byte of RAM for each.
 
+Before we read these variables we will also want to initialize them. We can do that below our initialization  of `wFrameCounter`.
+
+```rgbasm,linenos,start={{#line_no_of "" ../../unbricked/input/main.asm:initialize-vars}}
+{{#include ../../unbricked/input/main.asm:initialize-vars}}
+```
+
 We're going to use the `and` opcode, which we can use to set the zero flag (`z`) to the value of the bit.
 We can use this along with the `PADF` constants in hardware.inc to read a particular key.
 
diff --git a/unbricked/bricks/main.asm b/unbricked/bricks/main.asm
index 3dcc7534..7522ee31 100644
--- a/unbricked/bricks/main.asm
+++ b/unbricked/bricks/main.asm
@@ -90,8 +90,11 @@ ClearOam:
 	ld a, %11100100
 	ld [rOBP0], a
 
+	; Initialize variables
 	ld a, 0
 	ld [wFrameCounter], a
+	ld [wCurKeys], a
+	ld [wNewKeys], a
 
 Main:
 	ld a, [rLY]
diff --git a/unbricked/collision/main.asm b/unbricked/collision/main.asm
index feb49287..71f11e58 100644
--- a/unbricked/collision/main.asm
+++ b/unbricked/collision/main.asm
@@ -90,8 +90,11 @@ ClearOam:
 	ld a, %11100100
 	ld [rOBP0], a
 
+	; Initialize variables
 	ld a, 0
 	ld [wFrameCounter], a
+	ld [wCurKeys], a
+	ld [wNewKeys], a
 
 ; ANCHOR: momentum
 Main:
diff --git a/unbricked/functions/main.asm b/unbricked/functions/main.asm
index f34628b3..7d10098b 100644
--- a/unbricked/functions/main.asm
+++ b/unbricked/functions/main.asm
@@ -68,6 +68,7 @@ ClearOam:
 	ld a, %11100100
 	ld [rOBP0], a
 
+	; Initialize variables
 	ld a, 0
 	ld [wFrameCounter], a
 
diff --git a/unbricked/input/main.asm b/unbricked/input/main.asm
index e59f0c7a..f4349a9b 100644
--- a/unbricked/input/main.asm
+++ b/unbricked/input/main.asm
@@ -68,8 +68,13 @@ ClearOam:
 	ld a, %11100100
 	ld [rOBP0], a
 
+	; ANCHOR: initialize-vars
+	; Initialize variables
 	ld a, 0
 	ld [wFrameCounter], a
+	ld [wCurKeys], a
+	ld [wNewKeys], a
+	; ANCHOR_END: initialize-vars
 
 ; ANCHOR: main
 Main:
diff --git a/unbricked/objects/main.asm b/unbricked/objects/main.asm
index ee74d209..74ca22ac 100644
--- a/unbricked/objects/main.asm
+++ b/unbricked/objects/main.asm
@@ -94,6 +94,7 @@ ClearOam:
 ; ANCHOR_END: enable-oam
 
 ; ANCHOR: main-loop
+	; Initialize variables
 	ld a, 0
 	ld [wFrameCounter], a