From 835e9ee6f081c2b8d2f645f4258423d707614851 Mon Sep 17 00:00:00 2001
From: shockrahwow <alejandros714@protonmail.com>
Date: Wed, 16 Jan 2019 15:51:02 -0800
Subject: [PATCH] adding some basic frame buffer testing functions

---
 framebuffer.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++
 framebuffer.h |  7 +++++++
 2 files changed, 59 insertions(+)
 create mode 100644 framebuffer.c
 create mode 100644 framebuffer.h

diff --git a/framebuffer.c b/framebuffer.c
new file mode 100644
index 0000000..2324266
--- /dev/null
+++ b/framebuffer.c
@@ -0,0 +1,52 @@
+// Driver implementation for Jank's text frame buffer
+
+// Buffer can display 80 columns by 25 Rows
+// Start of buffer is at (real)address 0x000B8000
+// Memory at this section is divided into 16-bit cells 
+    // | 15-8 | 7-4 | 0-3
+    // | Asci | FG  | BG
+// The following colors are available(from 0x0 to 0xF):
+    // Black Blue Green Cyan Red Magenta 
+    // Brown LightGrey DarkGrey LightBlue LightGreen
+    // LightCyan LightRed LightMagenta LightBrown White
+
+/*
+enum typedef Colors{
+    Black,
+    Blue, 
+    Green,
+    Cyan,
+    Red, 
+    Magenta,
+    Brown, 
+    LightGrey,
+    DarkGrey,
+    LightBlue,
+    LightGreen, 
+    LightCyan,
+    LightRed,
+    LightMagenta,
+    LightBrown,
+    White,
+};
+*/
+#include "framebuffer.h"
+
+// page 24
+static char* Frame_Buffer = (char*)0x000B8000;
+// Writes character to a given cell in the framebuffer
+    // Safety handled by caller function 
+void write_cell(const unsigned cell, const char c, const char fg_bg) {
+    Frame_Buffer[cell] = c;
+    Frame_Buffer[cell+1] = fg_bg;
+}
+
+void colors() {
+    // finding what the fucking colors are that we can draw
+    unsigned char color = 0x00;
+    for(int i =0;i<0x20;i++) {
+        Frame_Buffer[i] = 'a';
+        Frame_Buffer[i+1] = color;
+        color++;
+    }
+}
\ No newline at end of file
diff --git a/framebuffer.h b/framebuffer.h
new file mode 100644
index 0000000..0ac75f7
--- /dev/null
+++ b/framebuffer.h
@@ -0,0 +1,7 @@
+#define COLUMNS 80
+#define ROWS 25
+#define AREA ( COLUMNS * ROWS )
+
+void write_cell(const unsigned cell, const char c , const char fg_bg);
+
+void hello();
\ No newline at end of file