monitor: Return early if invoked while already in the monitor
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@ -1,6 +1,10 @@
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; debug monitor
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invoke_monitor:
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; return if we're already in the monitor
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cmp [0x000003FC], monitor_vsync_handler
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ifz ret
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; set the vsync handler to our own and reenable interrupts
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mov [MONITOR_OLD_VSYNC_HANDLER], [0x000003FC]
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mov [0x000003FC], monitor_vsync_handler
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