Feat: Kernel has now a functions for better screen printing

build.sh

@@ -6,6 +6,7 @@ set -e  # Exit on any error
 echo "==================================="
 echo "    SoraOS Build System v1.0"
 echo "==================================="
+echo ""
 
 # Colors
 GREEN='\033[0;32m'
@@ -17,7 +18,7 @@ NC='\033[0m'
 echo -e "Preparing build environment...${NC}" 
 echo -e "Creating Folders${NC}"
 mkdir -p bin obj boot include
-echo -e "${GREEN}✓ ${NC}Folders created.${NC}"
+echo -e "${GREEN}✓${NC} Folders created.${NC}"
 
 # Step 1: Assemble Stage 1 bootloader (MBR - 512 bytes)
 echo -e "${BLUE}[1/6]${NC} Assembling Stage 1 bootloader (MBR)..."
@@ -46,7 +47,7 @@ cat ./bin/boot.bin ./bin/elevator.bin ./bin/kernel.bin > os.bin
 # Pad to floppy size (1.44MB)
 # FIX: Uncomment the line below if you want to ensure the image is exactly 1.44MB 
 #
-# truncate -s 1440K os-image.bin
+truncate -s 1440K os.bin
 
 echo ""
 echo -e "${GREEN}✓ Build complete!${NC}"

colors.h

@@ -0,0 +1,103 @@
+#ifndef COLORS_H
+#define COLORS_H
+
+#define VGA_WIDTH 80
+#define VGA_HEIGHT 25
+
+#define VGA_MEMORY_ADDRESS 0xB8000
+
+/* IN VGA - Video Memory Arrya:
+ * short
+ * 1s byte (left most)  -> TEXT COLOR
+ * 2s byte              -> BACK COLOR
+ * 3rd and 4rt byte     -> TEXT (unsigned char) AKA CodePoint
+ */
+
+typedef struct __attribute__((packed)) _VGA {
+	unsigned char codepoint; // 3rd and 4th byte
+	unsigned char color;     // 1st byte: text color, 2nd byte: background color
+	                         // LAST BIT IS BLINKING FLAG
+} _VGA;
+
+typedef enum _VGA_COLOR {
+	BLACK = 0x0,
+	BLUE = 0x1,
+	GREEN = 0x2,
+	CYAN = 0x3,
+	RED = 0x4,
+	MAGENTA = 0x5,
+	BROWN = 0x6,
+	LIGHT_GREY = 0x7,
+	DARK_GREY = 0x8,
+	LIGHT_BLUE = 0x9,
+	LIGHT_GREEN = 0xA,
+	LIGHT_CYAN = 0xB,
+	LIGHT_RED = 0xC,
+	LIGHT_MAGENTA = 0xD,
+	YELLOW = 0xE,
+	WHITE = 0xF
+} _VGA_COLOR;
+
+typedef struct _VGA_screen_space{
+    unsigned int line;
+    unsigned int column;
+
+} _VGA_screen_space;
+
+static _VGA_screen_space cursor_pos = {0, 0};
+
+/*
+ * END OF DECLARATIONS
+ */ 
+
+/*
+ * START OF FUNCTIONS
+ */
+
+// Convert _VGA_COLOR to color byte
+static inline unsigned char __vga_color_byte(_VGA_COLOR fg, _VGA_COLOR bg, int blink) {
+	unsigned char color = (bg << 4) | fg;
+	if (blink) {
+		color |= 0x80; // Set the blinking BIT
+		               // to the highest bit
+	}
+	return color;
+}
+
+// Get pointer to VGA memory
+static inline volatile _VGA* __vga_memory() {
+    return (volatile _VGA*)VGA_MEMORY_ADDRESS;
+}
+
+static inline void __clear_screen() {
+    volatile _VGA* vga = __vga_memory();
+    for (int i = 0; i < VGA_WIDTH * VGA_HEIGHT; i++) {
+        vga[i].codepoint = ' ';
+        vga[i].color = __vga_color_byte(WHITE, BLACK, 0);
+    }
+}
+
+static inline int __put_char_VGA_POS(_VGA _c, _VGA_screen_space _position, int _blink) {
+    if(_position.line > VGA_HEIGHT || _position.column > VGA_WIDTH) return 0; 
+ 
+    volatile _VGA* vga = __vga_memory();
+
+    vga[(_position.line * VGA_WIDTH) + _position.column].codepoint = _c.codepoint;
+    vga[(_position.line * VGA_WIDTH) + _position.column].color = _c.color;
+
+    return 1;
+}
+
+static inline int __put_char(int column, int line, unsigned codepoint, _VGA_COLOR foreground, _VGA_COLOR background, int _blink) {
+    _VGA __temp_vga;
+    __temp_vga.color = __vga_color_byte(foreground, background, _blink);
+    __temp_vga.codepoint = codepoint;
+
+    _VGA_screen_space __temp_vga_space;
+    __temp_vga_space.column = column;
+    __temp_vga_space.line = line;
+
+    return __put_char_VGA_POS(__temp_vga, __temp_vga_space, _blink);
+}
+
+#endif

kernel.c

@@ -1,42 +1,53 @@
 // File: kernel.c
 // SoraOS Kernel - Main entry point
 
-// Simple helper to write a character at a specific position
+// INFO:
-static inline void write_char(int row, int col, char c, unsigned char color) {
+// 0xA0000 for EGA/VGA graphics modes (64 KB)
-    volatile unsigned short *vga = (volatile unsigned short *)0xB8000;
+// 0xB0000 for monochrome text mode (32 KB)
-    int pos = (row * 80) + col;
+// 0xB8000 for color text mode and CGA-compatible graphics modes (32 KB)
-    vga[pos] = (color << 8) | c;
-}
 
-// Simple helper to write a string
+#include "colors.h"
-static void write_string(int row, int col, const char *str, unsigned char color) {
-    int i = 0;
-    while (str[i] != '\0') {
-        write_char(row, col + i, str[i], color);
-        i++;
-    }
-}
 
-// Clear the entire screen
+
-static void clear_screen(void) {
+/*
-    volatile unsigned short *vga = (volatile unsigned short *)0xB8000;
+static void __put_char(char c, unsigned char color) {
-    int i;
+	volatile unsigned short *vga = (volatile unsigned short *)0xB8000;
-    for (i = 0; i < 80 * 25; i++) {
+
-        vga[i] = (0x00 << 8) | ' ';
+	static int line = 0;
-    }
+	static int column = 2;
+
+	if (line >= 16) {
+		column += 3;
+		line = 0;
+	}
+
+	line++;
+
+	vga[line * 80 + 0 + column] = (0x2F << 8) | line; // White color
+	vga[line * 80 + 1 + column] = (color << 8) | c;   // White color
 }
+*/
 
 void kmain(void) {
-    // Clear screen
+	__clear_screen();
-    clear_screen();
+
-    
+	_VGA Char;
-    // Write messages
+	Char.codepoint = 'T';
-    write_string(10, 30, "SORA OS KERNEL", 0x0A);      // Green
+	Char.color = (WHITE << 4) | BLACK;
-    write_string(12, 25, "64-bit kernel running!", 0x0F); // White
+
-    write_string(14, 28, "System Initialized", 0x0E);   // Yellow 
+	_VGA_screen_space Space;
-    
+	Space.column = 2;
-    // Infinite loop
+	Space.line = 7;
-    while (1) {
+
-        __asm__ volatile ("hlt");
+	__put_char_VGA_POS(Char, Space, 1);
-    }
+
+    Space.line = 4;
+    Space.column = 3;
+
+	__put_char_VGA_POS(Char, Space, 0);
+
+	// Infinite loop
+	while (1) {
+		__asm__ volatile("hlt");
+	}
 }