From c6b118c0ad6b51e36855601de0913437833ba63b Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Mon, 25 Sep 2017 23:34:34 +0300
Subject: [PATCH] fame: always update the fetch map

should just get rid of that thing, it's annoying
---
 pico/32x/memory.c |  6 ------
 pico/cd/memory.c  | 17 -----------------
 pico/memory.c     | 28 ++++++++++++++++++++++++----
 3 files changed, 24 insertions(+), 27 deletions(-)

diff --git a/pico/32x/memory.c b/pico/32x/memory.c
index 8b9254f..2f3499c 100644
--- a/pico/32x/memory.c
+++ b/pico/32x/memory.c
@@ -1179,12 +1179,6 @@ static void bank_switch(int b)
   cpu68k_map_set(m68k_read16_map,  0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
 
   elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank);
-
-#ifdef EMU_F68K
-  // setup FAME fetchmap
-  for (rs = 0x90; rs < 0xa0; rs++)
-    PicoCpuFM68k.Fetch[rs] = (unsigned long)Pico.rom + bank - 0x900000;
-#endif
 }
 
 // -----------------------------------------------------------------
diff --git a/pico/cd/memory.c b/pico/cd/memory.c
index e660e35..fbc7c47 100644
--- a/pico/cd/memory.c
+++ b/pico/cd/memory.c
@@ -1071,23 +1071,6 @@ static void remap_word_ram(u32 r3)
     cpu68k_map_set(s68k_write8_map,  0x080000, 0x0bffff, s68k_dec_write8[b0 ^ 1][m], 1);
     cpu68k_map_set(s68k_write16_map, 0x080000, 0x0bffff, s68k_dec_write16[b0 ^ 1][m], 1);
   }
-
-#ifdef EMU_F68K
-  // update fetchmap..
-  int i;
-  if (!(r3 & 4))
-  {
-    for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x240000; i++)
-      PicoCpuFM68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram2M - 0x200000;
-  }
-  else
-  {
-    for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x220000; i++)
-      PicoCpuFM68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram1M[r3 & 1] - 0x200000;
-    for (i = M68K_FETCHBANK1*0x0c/0x100; (i<<(24-FAMEC_FETCHBITS)) < 0x0e0000; i++)
-      PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram1M[(r3&1)^1] - 0x0c0000;
-  }
-#endif
 }
 
 void pcd_state_loaded_mem(void)
diff --git a/pico/memory.c b/pico/memory.c
index 5be66f5..83fe181 100644
--- a/pico/memory.c
+++ b/pico/memory.c
@@ -63,6 +63,17 @@ void cpu68k_map_set(uptr *map, int start_addr, int end_addr,
     const void *func_or_mh, int is_func)
 {
   xmap_set(map, M68K_MEM_SHIFT, start_addr, end_addr, func_or_mh, is_func);
+#ifdef EMU_F68K
+  // setup FAME fetchmap
+  if (!is_func)
+  {
+    int shiftout = 24 - FAMEC_FETCHBITS;
+    int i = start_addr >> shiftout;
+    uptr base = (uptr)func_or_mh - (i << shiftout);
+    for (; i <= (end_addr >> shiftout); i++)
+      PicoCpuFM68k.Fetch[i] = base;
+  }
+#endif
 }
 
 // more specialized/optimized function (does same as above)
@@ -89,6 +100,17 @@ void cpu68k_map_all_ram(int start_addr, int end_addr, void *ptr, int is_sub)
   addr >>= 1;
   for (i = start_addr >> shift; i <= end_addr >> shift; i++)
     r8map[i] = r16map[i] = w8map[i] = w16map[i] = addr;
+#ifdef EMU_F68K
+  // setup FAME fetchmap
+  {
+    M68K_CONTEXT *ctx = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;
+    int shiftout = 24 - FAMEC_FETCHBITS;
+    i = start_addr >> shiftout;
+    addr = (uptr)ptr - (i << shiftout);
+    for (; i <= (end_addr >> shiftout); i++)
+      ctx->Fetch[i] = addr;
+  }
+#endif
 }
 
 static u32 m68k_unmapped_read8(u32 a)
@@ -799,14 +821,12 @@ PICO_INTERNAL void PicoMemSetup(void)
   {
     int i;
     // by default, point everything to first 64k of ROM
-    for (i = 0; i < M68K_FETCHBANK1; i++)
+    for (i = 0; i < M68K_FETCHBANK1 * 0xe0 / 0x100; i++)
       PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom - (i<<(24-FAMEC_FETCHBITS));
     // now real ROM
     for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < Pico.romsize; i++)
       PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom;
-    // .. and RAM
-    for (i = M68K_FETCHBANK1*14/16; i < M68K_FETCHBANK1; i++)
-      PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.ram - (i<<(24-FAMEC_FETCHBITS));
+    // RAM already set
   }
 #endif
 #ifdef EMU_M68K
-- 
2.39.2