diff --git a/monitor/monitor.asm b/monitor/monitor.asm
index 08b6743..36f9d7c 100644
--- a/monitor/monitor.asm
+++ b/monitor/monitor.asm
@@ -1,43 +1,11 @@
 ; debug monitor
 
+; only call this from system_breakpoint_handler!
 invoke_monitor:
     ; return if we're already in the 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
@@ -94,39 +62,6 @@ 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
 
 exit_monitor_and_jump:
@@ -140,39 +75,6 @@ exit_monitor_and_jump:
     ; save the jump address in a temporary location
     mov [MONITOR_OLD_RSP], r0
 
-    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
-
     jmp [MONITOR_OLD_RSP]
 
 invoke_monitor_aleady_in_monitor: