Separated functionality into separate files. Added initial (untested) support for ARM.

include/brados/string.h

@@ -0,0 +1,8 @@
+#ifndef __brados_string_h__
+#define __brados_string_h__
+
+#include <stddef.h>
+
+size_t strlen(const char *str);
+
+#endif

include/video/vga.h

@@ -0,0 +1,64 @@
+#ifndef __brados_video_vga_h__
+#define __brados_video_vga_h__
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define VGA_BUF 0xB8000
+
+#define VGA_WIDTH	80
+#define VGA_HEIGHT	24
+
+// VGA State
+struct vgastate {
+	size_t term_row, term_col;
+	uint8_t term_color;
+	uint16_t *term_buf;
+};
+
+// Color constants
+enum vga_color
+{
+	VGA_COLOR_BLACK = 0,
+	VGA_COLOR_BLUE = 1,
+	VGA_COLOR_GREEN = 2,
+	VGA_COLOR_CYAN = 3,
+	VGA_COLOR_RED = 4,
+	VGA_COLOR_MAGENTA = 5,
+	VGA_COLOR_BROWN = 6,
+	VGA_COLOR_LIGHT_GREY = 7,
+	VGA_COLOR_DARK_GREY = 8,
+	VGA_COLOR_LIGHT_BLUE = 9,
+	VGA_COLOR_LIGHT_GREEN = 10,
+	VGA_COLOR_LIGHT_CYAN = 11,
+	VGA_COLOR_LIGHT_RED = 12,
+	VGA_COLOR_LIGHT_MAGENTA = 13,
+	VGA_COLOR_LIGHT_BROWN = 14,
+	VGA_COLOR_WHITE = 15
+};
+
+// Create a VGA color
+uint8_t make_color(enum vga_color fg, enum vga_color bg);
+
+// Create a VGA character
+uint16_t make_vgaEntry(char c, uint8_t color);
+
+// Initialize a VGA term
+void term_init(struct vgastate *state);
+
+// Write a character to a VGA term
+void term_putChar(struct vgastate *state, char c);
+
+// Place a character in a VGA term's buffer
+void term_putEntryAt(struct vgastate *state, char c, uint8_t color, size_t x, size_t y);
+
+// Scroll the term down 1 line
+void term_scroll(struct vgastate *state);
+
+// Set VGA term color
+void term_setColor(struct vgastate *state, uint8_t color);
+
+// Write a string to a VGA term
+void term_writeStr(struct vgastate *state, const char *data);
+
+#endif