diff --git a/targets/startup.s b/targets/startup.s
index 2682331..f40cdcb 100644
--- a/targets/startup.s
+++ b/targets/startup.s
@@ -18,28 +18,6 @@
 .global os_stack
 .size os_stack, 4096
 
-# NOTE: New Start
-
-# .section .gdt
-# gdt_start:
-#     .quad 0x0000000000000000 # null descriptor
-#     .quad 0x00cf9a000000ffff # code segment descriptor: base=0, limit=4GB, 32-bit code
-#     .quad 0x00cf92000000ffff # data segment descriptor: base=0, limit=4GB, 32-bit data
-# gdt_end:
-#
-# gdt_descriptor:
-#     .word gdt_end - gdt_start - 1 # limit
-#     .long gdt_start # base
-#
-# .section .idt
-# idt_table:
-#     .space 256*8 # 256 entries x 8 bytes each
-# idt_descriptor:
-#     .word 256*8-1 # limit
-#     .long idt_table # base
-
-# NOTE: New End
-
 #.Lstack_bottom:
 os_stack:
     .byte 0
@@ -57,8 +35,6 @@ os_stack:
 .global _start
 .type _start, @function
 _start:
-# NOTE: Old Start
-
 	# Welcome to kernel mode!
 	# To set up a stack, we simply set the esp register to point to the top of
 	# our stack (as it grows downwards).
@@ -77,34 +53,6 @@ _start:
 .Lhang:
 	jmp .Lhang
 
-# NOTE: Old End
-
-# NOTE: New Start
-
-#     cli
-#
-#     lgdt gdt_descriptor # GDT
-#     lidt idt_descriptor # IDT Stub
-#
-#     # set up segment registers (flat 32-bit)
-#     movw $0x10, %ax
-#     movw %ax, %ds
-#     movw %ax, %es
-#     movw %ax, %fs
-#     movw %ax, %gs
-#     movw %ax, %ss
-#     movl $.Lstack_top, %esp # set stack
-#
-#     # call main C function
-#     call os_main
-#
-#     cli
-#     hlt
-# .Lhang:
-#     jmp .Lhang
-
-# NOTE: New End
-
 # Set the size of the _start symbol to the current location '.' minus its start.
 # This is useful when debugging or when you implement call tracing.
 .size _start, . - _start