From eee9b56f86462bd1ec24974b891be1f2e4d188f7 Mon Sep 17 00:00:00 2001
From: Nathan Cannon <neviynhd@gmail.com>
Date: Sat, 21 Oct 2017 16:31:41 +0100
Subject: [PATCH] Prevented zeroing of memory beyond the 8bit input.

---
 kernel.nim | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel.nim b/kernel.nim
index 41aa066..cab13f5 100644
--- a/kernel.nim
+++ b/kernel.nim
@@ -34,11 +34,11 @@ var
 
 proc terminalWriteAtPoint(writeChar: char, colour: int, xPos: int, yPos: int) =
   let index = terminalBufferBaseAddress + (yPos * vgaWidth + (xPos * 2))
-  cast[ptr int](index)[] = int(writeChar) # Write directly to display memory
-  cast[ptr int](index+1)[] = terminalColour
+  cast[ptr int8](index)[] = int8(writeChar) # Write directly to display memory
+  cast[ptr int8](index+1)[] = int8(terminalColour)
 
 proc terminalInitialize() =
-  terminalColour = vgaEntryColour(VGA_Colour.white, VGA_Colour.black)
+  terminalColour = vgaEntryColour(VGA_Colour.lightGreen, VGA_Colour.red)
   for y in 0..<vgaWidth:
     for x in 0..<vgaHeight:
       terminalWriteAtPoint(' ', terminalColour, x, y)
@@ -64,5 +64,5 @@ proc terminalWrite(data: string) =
 
 proc kernelMain() {.exportc: "kernel_main"}=
   terminalInitialize()
-  terminalWrite("Hello World This is Nim!")
+  terminalWrite("Hello World\LThis is Nim!")