mcd, tentative fix for hanging

diff --git a/pico/cd/memory.c b/pico/cd/memory.c
index 27925b5..e970b26 100644 (file)
--- a/pico/cd/memory.c
+++ b/pico/cd/memory.c
@@ -230,6 +230,13 @@ write_comm:
 \r
   pcd_sync_s68k(SekCyclesDone(), 0);\r
   Pico_mcd->s68k_regs[a] = d;\r
+  if (a == 0x03) {\r
+    // There are cases when master checks for successful switching of RAM to\r
+    // slave. This can produce race conditions where slave switches RAM back to\r
+    // master while master is delayed by interrupt before the check executes.\r
+    // Delay slave a bit to make sure master can check before slave changes.\r
+    SekCycleCntS68k += 24;\r
+  }\r
   if (Pico_mcd->m.s68k_poll_a == (a & ~1))\r
   {\r
     if (Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT) {\r