Feat: SCANF WORKING!

boot/elevator.asm

@@ -682,8 +682,12 @@ exception_handler:
 
 ; Dummy interrupt handler for IRQs (not CPU exceptions)
 dummy_handler:
+    push rax
+    ; Save registers and acknowledge the interrupt
     mov al, 0x20 
     out 0x20, al  ; Send EOI to PIC 
+    
+    pop rax
     iretq
 
 idt_descriptor:

build.sh

@@ -35,6 +35,8 @@ nasm -f elf64 ./boot/kernel.asm -o ./obj/kernel.asm.o
 # Step 4: Link kernel
 echo -e "${BLUE}[4/6]${NC} Linking kernel..."
 ld -T linker.ld -o ./bin/kernel.bin ./obj/kernel.asm.o ./obj/kernel.c.o --oformat binary --nostdlib
+# Debug build (optional)
+ld -T linker.ld -o ./bin/kernel_debug.elf ./obj/kernel.asm.o ./obj/kernel.c.o --oformat elf64-x86-64 --nostdlib
 
 # Step 4.5: Calculate kernel size in sectors 
 KERNEL_SIZE=$(stat -f%z ./bin/kernel.bin 2>/dev/null || stat -c%s ./bin/kernel.bin 2>/dev/null)
@@ -51,8 +53,7 @@ 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.bin
-truncate -s 1440K os.bin
 
 echo ""
 echo -e "${GREEN}✓ Build complete!${NC}"

kernel.c

@@ -33,14 +33,15 @@ void kmain(void) {
 
 	// TODO: Enable user input handling
 	char input_buffer[256] = {0};
-	gets(input_buffer, sizeof(input_buffer));
+    scanf("%s", input_buffer);
-
+	printf("You entered: %s\n", input_buffer);
-    printf("Input buffer contents in hex:\n");
-	for (int i = 0; input_buffer[i] != '\0'; i++) {
-		printf("[%x]", (unsigned char)input_buffer[i]);
-	}
-	printf("\nYou entered: %s\n", input_buffer);
 
+    int num1, num2;
+    printf("Enter num1: ");
+    scanf("%d", &num1);
+    printf("Enter num2: ");
+    scanf("%d", &num2);
+    printf("You entered: %d and %d\n", num1, num2);
 	// Infinite loop
 	while (1) {
 		__asm__ volatile("hlt");

stdio.h

@@ -178,6 +178,17 @@ static inline int __put_char_VGA_POS(_VGA _c, _VGA_screen_space _position, int _
 		return written;
 	}
 
+    if (_c.codepoint == '\b') {
+        if (_position.column > 0) {
+            _position.column--;
+            vga[(_position.line * VGA_WIDTH) + _position.column].codepoint = ' ';
+            vga[(_position.line * VGA_WIDTH) + _position.column].color = _c.color;
+        }
+        text_pos.line = _position.line;
+        text_pos.column = _position.column;
+        return 1;
+    }
+
 	vga[(_position.line * VGA_WIDTH) + _position.column].codepoint = _c.codepoint;
 	vga[(_position.line * VGA_WIDTH) + _position.column].color = _c.color;
 
@@ -435,36 +446,14 @@ static inline char __convert_ascii(uint8_t __scancode) {
 	return __char;
 }
 
-uint8_t __scancode_h[128] = {0};
-static uint32_t __total_isr_calls = 0;
-
 void __keyboard_handle_scancode(uint8_t __scancode) {
-	__total_isr_calls++;
-
 	char __temp = __convert_ascii(__scancode);
-	static uint8_t __index = 0;
-
-	if (__index < sizeof(__scancode_h)) {
-		__scancode_h[__index++] = __scancode;
-	}
-
 	if (__temp == '\0') {
 		return;
 	}
 	__keyboard_buffer_push(__temp);
 }
 
-void __dump_scancode_history() {
-	printf("Scancode History: \n");
-    printf("Total ISR Calls: %u\n", __total_isr_calls);
-	for (size_t i = 0; i < sizeof(__scancode_h); i++) {
-		if (__scancode_h[i] != 0) {
-			printf("[%x] = %c\n", __scancode_h[i], __convert_ascii(__scancode_h[i]));
-		}
-	}
-	printf("\n");
-}
-
 static inline char __gets_internal(char *buffer, size_t max_length) {
 	size_t index = 0;
 	char __c;
@@ -477,10 +466,22 @@ static inline char __gets_internal(char *buffer, size_t max_length) {
 		}
 
 		if (__c == '\n' || __c == '\r') {
+            printf("\n");
 			buffer[index] = '\0';
 			break;
 		}
 
+        if (__c == '\b') {
+            if (index > 0) {
+                index--;
+                printf("\b \b");
+                scursor(text_pos.column, text_pos.line);
+            }
+            continue;
+        }
+
+        printf("%c", __c);
+        scursor(text_pos.column, text_pos.line);
 		buffer[index++] = __c;
 	}
 
@@ -492,9 +493,8 @@ void gets(char *buffer, size_t max_length) {
 	__gets_internal(buffer, max_length);
 }
 
-/*
 static inline int __scanf_internal(const char *fmt, va_list args) {
-
+    scursor(text_pos.column, text_pos.line);
 	char buffer[256];
 	__gets_internal(buffer, sizeof(buffer));
 
@@ -559,6 +559,5 @@ int scanf(const char *fmt, ...) {
 	va_end(args);
 	return result;
 }
-*/
 
 #endif