Initial commit

2022-09-21 16:53:45 +03:00 · 2022-09-21 16:53:45 +03:00 · 298d1be60c
commit 298d1be60c
3 changed files with 41 additions and 0 deletions
--- a/12
+++ b/12
@ -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 $@
+
--- a/README.md
+++ b/README.md
@ -0,0 +1 @@
+Yet Another BootLoader, OS Kernel and Other stuff
--- a/mbr.S
+++ 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
				`@ -0,0 +1 @@`
				`Yet Another BootLoader, OS Kernel and Other stuff`