diff --git a/monitor/monitor.asm b/monitor/monitor.asm
index af2d994..4f149c4 100644
--- a/monitor/monitor.asm
+++ b/monitor/monitor.asm
@@ -5,6 +5,39 @@ invoke_monitor:
     cmp [0x000003FC], monitor_vsync_handler
     ifz jmp invoke_monitor_aleady_in_monitor
 
+    push r31
+    push r30
+    push r29
+    push r28
+    push r27
+    push r26
+    push r25
+    push r24
+    push r23
+    push r22
+    push r21
+    push r20
+    push r19
+    push r18
+    push r17
+    push r16
+    push r15
+    push r14
+    push r13
+    push r12
+    push r11
+    push r10
+    push r9
+    push r8
+    push r7
+    push r6
+    push r5
+    push r4
+    push r3
+    push r2
+    push r1
+    push r0
+
     ; set the vsync handler to our own and reenable interrupts
     mov [MONITOR_OLD_VSYNC_HANDLER], [0x000003FC]
     mov [0x000003FC], monitor_vsync_handler
@@ -61,6 +94,39 @@ exit_monitor:
 
     call enable_cursor
 
+    pop r0
+    pop r1
+    pop r2
+    pop r3
+    pop r4
+    pop r5
+    pop r6
+    pop r7
+    pop r8
+    pop r9
+    pop r10
+    pop r11
+    pop r12
+    pop r13
+    pop r14
+    pop r15
+    pop r16
+    pop r17
+    pop r18
+    pop r19
+    pop r20
+    pop r21
+    pop r22
+    pop r23
+    pop r24
+    pop r25
+    pop r26
+    pop r27
+    pop r28
+    pop r29
+    pop r30
+    pop r31
+
     ret
 
 invoke_monitor_aleady_in_monitor: