Initial commit

Makefile

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+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 $@
+

README.md

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+Yet Another BootLoader, OS Kernel and Other stuff

mbr.S

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+    .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