Add boot.asm

boot.asm

@@ -0,0 +1,35 @@
+; boot.asm - A simple bootloader example
+[bits 16]          ; Set to 16-bit mode
+[org 0x7C00]      ; BIOS loads the bootloader at this address
+
+start:
+    ; Clear screen
+    mov ax, 0x0003   ; Set video mode to 3 (80x25 color text)
+    int 0x10        ; BIOS interrupt to set video mode
+
+    ; Print "Hello, World!"
+    mov si, hello_message ; Load address of the message into SI
+    call print_string   ; Call function to print the string
+
+    ; Hang the system (infinite loop)
+hang:
+    jmp hang           ; Jump to hang indefinitely
+
+; Function to print a string
+print_string:
+    mov ah, 0x0E      ; BIOS teletype output function
+.next_char:
+    lodsb             ; Load byte at DS:SI into AL and increment SI
+    cmp al, 0         ; Check for null terminator
+    je .done          ; If null, we are done
+    int 0x10         ; Call BIOS to print character in AL
+    jmp .next_char   ; Repeat for next character
+.done:
+    ret               ; Return from function
+
+; Data section
+hello_message db 'Hello, World!', 0  ; Null-terminated string
+
+; Bootloader signature (must be present)
+times 510 - ($ - $$) db 0   ; Fill the rest of the sector with zeros
+dw 0xAA55                   ; Boot signature