From 9e57201b0820ece8b1087579422347f2f776e3a6 Mon Sep 17 00:00:00 2001
From: Lior Halphon <LIJI32@gmail.com>
Date: Sun, 5 Dec 2021 16:18:54 +0200
Subject: [PATCH] Accurate IF clear timing

---
 Core/sm83_cpu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Core/sm83_cpu.c b/Core/sm83_cpu.c
index 6920c79..4980871 100644
--- a/Core/sm83_cpu.c
+++ b/Core/sm83_cpu.c
@@ -1639,6 +1639,10 @@ void GB_cpu_run(GB_gameboy_t *gb)
                 interrupt_queue >>= 1;
                 interrupt_bit++;
             }
+            assert(gb->pending_cycles > 2);
+            gb->pending_cycles -= 2;
+            flush_pending_cycles(gb);
+            gb->pending_cycles = 2;
             gb->io_registers[GB_IO_IF] &= ~(1 << interrupt_bit);
             gb->pc = interrupt_bit * 8 + 0x40;
         }