Formatting and Commenting

source/boot.asm

@@ -1,4 +1,4 @@
-bits 32 ;; 32-bit
+bits 32 ;; Specify 32 bit mode to NASM
 section .text
         align 4
         dd 0x1BADB002            ;magic value
@@ -9,11 +9,11 @@ global start
 extern kmain
 
 start:
-  cli 			; disable interrupts
-  mov esp, stack_space	; set stack pointer
-  call kmain
-  hlt		 	; disable CPU after kernel exit
+  cli ; disable interrupts
+  mov esp, stack_space ; set stack pointer
+  call kmain ; call main kernel function
+  hlt ; disable CPU after kernel exit
 
 section .bss
-resb 8192		; 8KB of stack space
+resb 8192 ; reserve 8KB for stack space
 stack_space:

source/screen.c

@@ -2,55 +2,57 @@
 #include "include/charcolors.h"
 
 char *vidmemptr = (char *)0xb8000; // pointer to video memory
-unsigned int current_loc = 0;	  // current char location
+unsigned int current_loc = 0;      // current char location
 
 /*
 Writes chars to video memory
 */
 void kprint(const char *str)
 {
-	unsigned int i = 0;
-	while (str[i] != '\0')
-	{
-		if (str[i] == '\n'){
-			unsigned int line_size = CHAR_BYTE_SIZE * COLUMNS_IN_LINE;
-			current_loc = current_loc + (line_size - current_loc % (line_size));
-			i++;
-			continue;
-		}
-		vidmemptr[current_loc++] = str[i++];		  // print char
-		vidmemptr[current_loc++] = CHAR_FG_LIGHTGRAY; // light gray font
-	}
+    unsigned int i = 0;
+    while (str[i] != '\0')
+    {
+        if (str[i] == '\n')
+        {
+            unsigned int line_size = CHAR_BYTE_SIZE * COLUMNS_IN_LINE;
+            current_loc = current_loc + (line_size - current_loc % (line_size));
+            i++;
+            continue;
+        }
+        vidmemptr[current_loc++] = str[i++];          // print char
+        vidmemptr[current_loc++] = CHAR_FG_LIGHTGRAY; // light gray font
+    }
 }
 
 /*
 kprint() variant with colored text
 */
 void kprintcolored(const char *str, unsigned int color)
 {
-	unsigned int i = 0;
-	while (str[i] != '\0')
-	{		
-		if (str[i] == '\n'){ // check for \n symbol
-			unsigned int line_size = CHAR_BYTE_SIZE * COLUMNS_IN_LINE;
-			current_loc = current_loc + (line_size - current_loc % (line_size));
-			i++;
-			continue;
-		}
-		vidmemptr[current_loc++] = str[i++]; // print char
-		vidmemptr[current_loc++] = color;	// set attrib-byte to user-defined color
-	}
+    unsigned int i = 0;
+    while (str[i] != '\0')
+    {
+        if (str[i] == '\n')
+        { // check for \n symbol
+            unsigned int line_size = CHAR_BYTE_SIZE * COLUMNS_IN_LINE;
+            current_loc = current_loc + (line_size - current_loc % (line_size));
+            i++;
+            continue;
+        }
+        vidmemptr[current_loc++] = str[i++]; // print char
+        vidmemptr[current_loc++] = color;    // set attrib-byte to user-defined color
+    }
 }
 
 /*
 Loop over the entire screen, filling video memory with empty chars
 */
 void clear_screen(void)
 {
-	unsigned int i = 0;
-	while (i < SCREENSIZE)
-	{
-		vidmemptr[i++] = ' ';
-		vidmemptr[i++] = 0x07;
-	}
+    unsigned int i = 0;
+    while (i < SCREENSIZE)
+    {
+        vidmemptr[i++] = ' ';
+        vidmemptr[i++] = 0x07;
+    }
 }