From 419973a6d6cb92f96a60f1d5ccda0beb8b28b15d Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Sun, 18 Aug 2013 02:43:52 +0300
Subject: [PATCH] 32x: some hacks..

---
 pico/32x/32x.c    |  2 ++
 pico/32x/memory.c | 22 +++++++++++++++++++++-
 pico/pico_int.h   |  5 +++--
 3 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/pico/32x/32x.c b/pico/32x/32x.c
index 0eb2974f..ab522e41 100644
--- a/pico/32x/32x.c
+++ b/pico/32x/32x.c
@@ -523,6 +523,8 @@ void sync_sh2s_lockstep(unsigned int m68k_target)
 
 #define CPUS_RUN(m68k_cycles,s68k_cycles) do { \
   SekRunM68k(m68k_cycles); \
+  if (Pico32x.emu_flags & P32XF_Z80_32X_IO) \
+    PicoSyncZ80(SekCycleCnt); \
   if (Pico32x.emu_flags & (P32XF_68KCPOLL|P32XF_68KVPOLL)) \
     p32x_sync_sh2s(SekCyclesDoneT2()); \
 } while (0)
diff --git a/pico/32x/memory.c b/pico/32x/memory.c
index eabc1b62..08e48e86 100644
--- a/pico/32x/memory.c
+++ b/pico/32x/memory.c
@@ -195,8 +195,10 @@ static u32 p32x_reg_read16(u32 a)
       m68k_poll.cnt = 0;
     dr2 = SekDar(2);
 
-    if (cycles - msh2.m68krcycles_done > 500)
+    if (cycles - msh2.m68krcycles_done > 244
+        || (Pico32x.comm_dirty_68k & comreg))
       p32x_sync_sh2s(cycles);
+
     if (Pico32x.comm_dirty_sh2 & comreg)
       Pico32x.comm_dirty_sh2 &= ~comreg;
     else if (m68k_poll_detect(a, cycles, P32XF_68KCPOLL)) {
@@ -1523,6 +1525,21 @@ void REGPARM(3) p32x_sh2_write32(u32 a, u32 d, SH2 *sh2)
 
 // -----------------------------------------------------------------
 
+static void z80_md_bank_write_32x(unsigned int a, unsigned char d)
+{
+  unsigned int addr68k;
+
+  addr68k = Pico.m.z80_bank68k << 15;
+  addr68k += a & 0x7fff;
+  if ((addr68k & 0xfff000) == 0xa15000)
+    Pico32x.emu_flags |= P32XF_Z80_32X_IO;
+
+  elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, d);
+  m68k_write8(addr68k, d);
+}
+
+// -----------------------------------------------------------------
+
 static const u16 msh2_code[] = {
   // trap instructions
   0xaffe, // bra <self>
@@ -1779,6 +1796,9 @@ void PicoMemSetup32x(void)
 
   sh2_drc_mem_setup(&msh2);
   sh2_drc_mem_setup(&ssh2);
+
+  // z80 hack
+  z80_map_set(z80_write_map, 0x8000, 0xffff, z80_md_bank_write_32x, 1);
 }
 
 void Pico32xMemStateLoaded(void)
diff --git a/pico/pico_int.h b/pico/pico_int.h
index e71245a8..a4f446b4 100644
--- a/pico/pico_int.h
+++ b/pico/pico_int.h
@@ -482,8 +482,9 @@ typedef struct
 #define P32XP_FULL  (1<<15) // PWM pulse
 #define P32XP_EMPTY (1<<14)
 
-#define P32XF_68KCPOLL  (1 << 0)
-#define P32XF_68KVPOLL  (1 << 1)
+#define P32XF_68KCPOLL   (1 << 0)
+#define P32XF_68KVPOLL   (1 << 1)
+#define P32XF_Z80_32X_IO (1 << 7) // z80 does 32x io
 
 #define P32XI_VRES (1 << 14/2) // IRL/2
 #define P32XI_VINT (1 << 12/2)
-- 
2.39.5