Added minimal mbr for testing

1 files changed, 48 insertions, 0 deletions

diff --git a/boot/test.asm b/boot/test.asm
new file mode 100644
index 0000000..62110b6
--- /dev/null
+++ b/boot/test.asm
@@ -0,0 +1,48 @@
+[org 0x7c00]
+
+[bits 16]
+jmp boot_16 ;start boot process
+
+STR_VERSION:
+
+    db "FoolOs~",0
+
+;print_string routine ([bx])
+;this routine will print a null terminated string at [bx] to the screen.
+print_string:
+
+    pusha			;push all registers
+    mov ah,0x0e
+
+    print_string_loop:
+
+	;check if value at [bx] is "\0" (end of string)
+	mov cl,[bx]
+	cmp cl,0
+	je print_string_finish
+
+	;otherwise instruct BIOS to print the current char
+	mov al,cl
+	int 0x10
+
+	;proceed with next char
+        inc bx
+	jmp print_string_loop
+
+    print_string_finish:
+
+    popa			;pop all registers
+    ret				;return to caller
+
+boot_16:
+
+    mov bx, STR_VERSION
+    call print_string
+
+    jmp boot_16
+
+times 510-($-$$) db 0
+dw 0xaa55
+
+
+