From 8053c8a523ad38ecd9ce68f2df96dd2603c49713 Mon Sep 17 00:00:00 2001
From: SarahW <pcem@pcem-emulator.co.uk>
Date: Thu, 19 Nov 2020 22:09:41 +0000
Subject: [PATCH] Ensure that any cycles spent when entering IRQ/NMI in dynarec
 are accounted for in the TSC, and by extension the timer system. Fixes
 slowdown and stuttering music in Museum Madness.

---
 src/386_dynarec.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/386_dynarec.c b/src/386_dynarec.c
index 895c745..9dedf44 100644
--- a/src/386_dynarec.c
+++ b/src/386_dynarec.c
@@ -591,8 +591,6 @@ void exec386_dynarec(int cycs)
                                 exec_interpreter();
                         else
                                 exec_recompiler();
-                        cycdiff=oldcyc-cycles;
-                        tsc += cycdiff;
                 
                         if (cpu_state.abrt)
                         {
@@ -643,6 +641,9 @@ void exec386_dynarec(int cycs)
 //                                        pclog("IRQ %02X %04X:%04X %04X:%04X\n", temp, SS, SP, CS, pc);
                                 }
                         }
+
+                        cycdiff=oldcyc-cycles;
+                        tsc += cycdiff;
                 }
         
 		if (TIMER_VAL_LESS_THAN_VAL(timer_target, (uint32_t)tsc))