X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FMemory.c;h=99f784600ce94a7590e87939103e930c3cd7eacc;hb=45a1ef7153910f005c01cba63d12f312071efef0;hp=fe87ab98ff340e5a44575653d018265b0978acad;hpb=e53704e691c4de8c53ebe3c54e75a9ca8825bb2b;p=picodrive.git

diff --git a/Pico/Memory.c b/Pico/Memory.c
index fe87ab9..99f7846 100644
--- a/Pico/Memory.c
+++ b/Pico/Memory.c
@@ -798,7 +798,7 @@ int ym2612_write_local(u32 a, u32 d, int is_from_z80)
             ym2612.OPN.ST.TA = TAnew;
             //ym2612.OPN.ST.TAC = (1024-TAnew)*18;
             //ym2612.OPN.ST.TAT = 0;
-            timer_a_step = timer_a_offset = 16466 * (1024 - TAnew);
+            timer_a_step = timer_a_offset = TIMER_A_TICK_ZCYCLES * (1024 - TAnew);
             if (ym2612.OPN.ST.mode & 1) {
               int cycles = is_from_z80 ? z80_cyclesDone() : cycles_68k_to_z80(SekCyclesDone());
               timer_a_next_oflow = (cycles << 8) + timer_a_step;
@@ -813,7 +813,7 @@ int ym2612_write_local(u32 a, u32 d, int is_from_z80)
             ym2612.OPN.ST.TB = d;
             //ym2612.OPN.ST.TBC = (256-d) * 288;
             //ym2612.OPN.ST.TBT  = 0;
-            timer_b_step = timer_b_offset = 262800 * (256 - d); // 262881
+            timer_b_step = timer_b_offset = TIMER_B_TICK_ZCYCLES * (256 - d); // 262800
             if (ym2612.OPN.ST.mode & 2) {
               int cycles = is_from_z80 ? z80_cyclesDone() : cycles_68k_to_z80(SekCyclesDone());
               timer_b_next_oflow = (cycles << 8) + timer_b_step;
@@ -925,7 +925,7 @@ void ym2612_pack_state(void)
 
 #ifdef __GP2X__
   if (PicoOpt & POPT_EXT_FM)
-    /*YM2612PicoStateSave2_940(tat, tbt)*/;
+    YM2612PicoStateSave2_940(tat, tbt);
   else
 #endif
     YM2612PicoStateSave2(tat, tbt);
@@ -937,22 +937,37 @@ void ym2612_unpack_state(void)
   YM2612PicoStateLoad();
 
   // feed all the registers and update internal state
-  for (i = 0x20; i < 0xB8; i++) {
+  for (i = 0x20; i < 0xA0; i++) {
     ym2612_write_local(0, i, 0);
     ym2612_write_local(1, ym2612.REGS[i], 0);
   }
-  for (i = 0x30; i < 0xB8; i++) {
+  for (i = 0x30; i < 0xA0; i++) {
+    ym2612_write_local(2, i, 0);
+    ym2612_write_local(3, ym2612.REGS[i|0x100], 0);
+  }
+  for (i = 0xAF; i >= 0xA0; i--) { // must apply backwards
+    ym2612_write_local(2, i, 0);
+    ym2612_write_local(3, ym2612.REGS[i|0x100], 0);
+    ym2612_write_local(0, i, 0);
+    ym2612_write_local(1, ym2612.REGS[i], 0);
+  }
+  for (i = 0xB0; i < 0xB8; i++) {
+    ym2612_write_local(0, i, 0);
+    ym2612_write_local(1, ym2612.REGS[i], 0);
     ym2612_write_local(2, i, 0);
     ym2612_write_local(3, ym2612.REGS[i|0x100], 0);
   }
 
 #ifdef __GP2X__
   if (PicoOpt & POPT_EXT_FM)
-    /*ret = YM2612PicoStateLoad2_940(&tat, &tbt)*/;
+    ret = YM2612PicoStateLoad2_940(&tat, &tbt);
   else
 #endif
     ret = YM2612PicoStateLoad2(&tat, &tbt);
-  if (ret != 0) return; // no saved timers
+  if (ret != 0) {
+    elprintf(EL_STATUS, "old ym2612 state");
+    return; // no saved timers
+  }
 
   tac = (1024 - ym2612.OPN.ST.TA) << 16;
   tbc = (256  - ym2612.OPN.ST.TB) << 16;