From 94984f5db404392f2dd55f0e484a133996f75961 Mon Sep 17 00:00:00 2001
From: Colby <colby@taplaboratories.com.au>
Date: Thu, 21 Jul 2016 18:09:41 +1000
Subject: [PATCH] fix incorrect interrupt time and serving the correct
 interrupt

---
 lib/waterfoul/cpu.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/waterfoul/cpu.rb b/lib/waterfoul/cpu.rb
index 82a4e94..06c32cf 100644
--- a/lib/waterfoul/cpu.rb
+++ b/lib/waterfoul/cpu.rb
@@ -131,13 +131,13 @@ module Waterfoul
     end
 
     def serve_interrupt
-      interrupt = Interrupt.serve_interrupt
+      interrupt = Interrupt.pending_interrupt
       # skip if there is no interrupt to serve
       return if interrupt == Interrupt::INTERRUPT_NONE
       # master disable interrupts
       @ime = false
       push_onto_stack @pc
-      @m = 10
+      @m = 20
       # point to instruction which handles appropiate interrupt
       case interrupt
       when Interrupt::INTERRUPT_VBLANK