diff --git a/Part2/A4/07_timers/boot/bootsect.bin b/Part2/A4/07_timers/boot/bootsect.bin
new file mode 100644
index 0000000..3bdf970
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diff --git a/Part2/A4/07_timers/boot/kernel_entry.o b/Part2/A4/07_timers/boot/kernel_entry.o
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index 0000000..05e8c66
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diff --git a/Part2/A4/07_timers/cpu/idt.o b/Part2/A4/07_timers/cpu/idt.o
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index 0000000..cbc1a9b
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diff --git a/Part2/A4/07_timers/cpu/interrupt.o b/Part2/A4/07_timers/cpu/interrupt.o
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index 0000000..9569f56
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diff --git a/Part2/A4/07_timers/cpu/isr.o b/Part2/A4/07_timers/cpu/isr.o
new file mode 100644
index 0000000..02fa030
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diff --git a/Part2/A4/07_timers/cpu/timer.o b/Part2/A4/07_timers/cpu/timer.o
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index 0000000..0a7a49e
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diff --git a/Part2/A4/07_timers/drivers/keyboard.o b/Part2/A4/07_timers/drivers/keyboard.o
new file mode 100644
index 0000000..095bf31
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diff --git a/Part2/A4/07_timers/drivers/ports.o b/Part2/A4/07_timers/drivers/ports.o
new file mode 100644
index 0000000..fcd6826
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diff --git a/Part2/A4/07_timers/drivers/screen.o b/Part2/A4/07_timers/drivers/screen.o
new file mode 100644
index 0000000..be5044f
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diff --git a/Part2/A4/07_timers/kernel.bin b/Part2/A4/07_timers/kernel.bin
new file mode 100755
index 0000000..e74ef9e
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diff --git a/Part2/A4/07_timers/kernel/kernel.c b/Part2/A4/07_timers/kernel/kernel.c
index a555696..e0f4ad5 100755
--- a/Part2/A4/07_timers/kernel/kernel.c
+++ b/Part2/A4/07_timers/kernel/kernel.c
@@ -6,7 +6,9 @@ void _start() {
     isr_install();
 
     asm volatile("sti");
-    init_timer(50);
+    /* init_timer(50); */
+    /* init_timer(1000); */
+    init_timer(10);
     /* Comment out the timer IRQ handler to read
      * the keyboard IRQs easier */
     init_keyboard();
diff --git a/Part2/A4/07_timers/kernel/kernel.o b/Part2/A4/07_timers/kernel/kernel.o
new file mode 100644
index 0000000..5de7b3f
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diff --git a/Part2/A4/07_timers/kernel/util.o b/Part2/A4/07_timers/kernel/util.o
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index 0000000..9cceac1
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diff --git a/Part2/A4/07_timers/os-image.bin b/Part2/A4/07_timers/os-image.bin
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index 0000000..cadeaab
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