From 298d1be60ce2300b006146a7e117c82b86248fa1 Mon Sep 17 00:00:00 2001
From: Alexander Myltsev <a.myltsev@gmail.com>
Date: Wed, 21 Sep 2022 16:53:45 +0300
Subject: [PATCH] Initial commit

---
 Makefile  | 12 ++++++++++++
 README.md |  1 +
 mbr.S     | 28 ++++++++++++++++++++++++++++
 3 files changed, 41 insertions(+)
 create mode 100644 Makefile
 create mode 100644 README.md
 create mode 100644 mbr.S

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..79aec12
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,12 @@
+AS=x86_64-elf-as
+LD=x86_64-elf-ld
+
+run: mbr.bin
+	qemu-system-i386 -drive format=raw,file=$<
+
+%.o: %.S
+	$(AS) $^ -o $@
+
+mbr.bin: mbr.o
+	$(LD) -Ttext=0x7c00 --oformat=binary $^ -o $@
+
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ed69b2f
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+Yet Another BootLoader, OS Kernel and Other stuff
diff --git a/mbr.S b/mbr.S
new file mode 100644
index 0000000..4aceb13
--- /dev/null
+++ b/mbr.S
@@ -0,0 +1,28 @@
+    .code16
+    .global _start
+_start:                   #точка входа
+    mov $banner, %si
+    call print_string
+
+    jmp . // loop forever
+
+
+print_string:
+    mov $0x0e, %ah  // "teletype output"
+repeat:
+    lodsb           // equivalent to mov (%si), %al; inc %si
+
+    test %al, %al
+    je done
+
+    int $0x10       // bios interrupt
+    jmp repeat
+done:
+    ret
+
+    . = _start + 256     # pad to 256 bytes
+banner:
+    .asciz "YABLOKO bootloader started\r\n"
+
+    . = _start + 510     # pad to 510 bytes
+    .byte 0x55, 0xaa     # boot sector magic value