From efaa5e0b0446e52356b0ca8692a174e11d4a9cd6 Mon Sep 17 00:00:00 2001
From: kub <derkub@gmail.com>
Date: Mon, 17 May 2021 23:13:27 +0200
Subject: [PATCH] mcd, optimizations for polling detection

---
 pico/cd/mcd.c    | 2 +-
 pico/cd/memory.c | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/pico/cd/mcd.c b/pico/cd/mcd.c
index 602b6eb4..732a4299 100644
--- a/pico/cd/mcd.c
+++ b/pico/cd/mcd.c
@@ -342,7 +342,7 @@ void pcd_run_cpus_normal(int m68k_cycles)
       Pico_mcd->m.m68k_poll_cnt = 0;
 
 #ifdef USE_POLL_DETECT
-    if (Pico_mcd->m.m68k_poll_cnt >= 32) {
+    if (Pico_mcd->m.m68k_poll_cnt >= 16) {
       int s68k_left;
       // main CPU is polling, (wake and) run sub only
       if (SekIsStoppedS68k())
diff --git a/pico/cd/memory.c b/pico/cd/memory.c
index a47d6a37..05ee3e13 100644
--- a/pico/cd/memory.c
+++ b/pico/cd/memory.c
@@ -63,7 +63,7 @@ static void remap_prg_window(u32 r1, u32 r3);
 static void remap_word_ram(u32 r3);
 
 // poller detection
-#define POLL_LIMIT 32
+#define POLL_LIMIT 16
 #define POLL_CYCLES 64
 
 void m68k_comm_check(u32 a)
@@ -78,13 +78,15 @@ void m68k_comm_check(u32 a)
     Pico_mcd->m.need_sync = 1;
   }
   Pico_mcd->m.m68k_poll_clk = cycles;
-  if (SekNotPolling || a != Pico_mcd->m.m68k_poll_a || clkdiff > POLL_CYCLES) {
+  if (SekNotPolling || a != Pico_mcd->m.m68k_poll_a || clkdiff > POLL_CYCLES || clkdiff <= 16) {
     Pico_mcd->m.m68k_poll_a = a;
     Pico_mcd->m.m68k_poll_cnt = 0;
     SekNotPolling = 0;
     return;
   }
   Pico_mcd->m.m68k_poll_cnt++;
+  if(Pico_mcd->m.m68k_poll_cnt == POLL_LIMIT)
+    SekEndRun(0);
 }
 
 #ifndef _ASM_CD_MEMORY_C
-- 
2.39.2