X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=pico%2Fcd%2Fmcd.c;h=82ae1bc663e5634a1d3c1f6a90b9c20f02f83a87;hb=ba6e8bfd4b707aab042e47bc3e2a14f70be01075;hp=539d157e0ebffa1a35d91ead576c22a383c43145;hpb=89dbbf2b2fe885c9f443178c1f1350567e92160b;p=picodrive.git

diff --git a/pico/cd/mcd.c b/pico/cd/mcd.c
index 539d157..82ae1bc 100644
--- a/pico/cd/mcd.c
+++ b/pico/cd/mcd.c
@@ -252,15 +252,18 @@ int pcd_sync_s68k(unsigned int m68k_target, int m68k_poll_sync)
   #undef now
 }
 
+#define pcd_run_cpus_normal pcd_run_cpus
+//#define pcd_run_cpus_lockstep pcd_run_cpus
+
 static void SekSyncM68k(void);
 
-static void pcd_run_cpus(int m68k_cycles)
+static inline void pcd_run_cpus_normal(int m68k_cycles)
 {
   SekCycleAim += m68k_cycles;
   if (Pico_mcd->m.m68k_poll_cnt >= 16 && !SekShouldInterrupt()) {
     int s68k_left = pcd_sync_s68k(SekCycleAim, 1);
     if (s68k_left <= 0) {
-      elprintf(EL_CDPOLL, "m68k poll [%02x] %d @%06x",
+      elprintf(EL_CDPOLL, "m68k poll [%02x] x%d @%06x",
         Pico_mcd->m.m68k_poll_a, Pico_mcd->m.m68k_poll_cnt, SekPc);
       SekCycleCnt = SekCycleAim;
       return;
@@ -271,6 +274,16 @@ static void pcd_run_cpus(int m68k_cycles)
   SekSyncM68k();
 }
 
+static inline void pcd_run_cpus_lockstep(int m68k_cycles)
+{
+  unsigned int target = SekCycleAim + m68k_cycles;
+  do {
+    SekCycleAim += 8;
+    SekSyncM68k();
+    pcd_sync_s68k(SekCycleAim, 0);
+  } while (CYCLES_GT(target, SekCycleAim));
+}
+
 #define PICO_CD
 #define CPUS_RUN(m68k_cycles) \
   pcd_run_cpus(m68k_cycles)