genesis+plus+gx: fix (1 case of) broken determinism in savestates. io_regs was the only thing saved, input struct is what the client sends, and gamepad struct is constantly used but never saved.

genplus-gx/cinterface/zap.c

@@ -97,13 +97,6 @@ extern struct
   uint8 Counter;
 } activator[2];
 
-extern struct
-{
-  uint8 State;
-  uint8 Counter;
-  uint8 Timeout;
-} gamepad[MAX_DEVICES];
-
 extern uint8 pad_index;
 
 extern struct

genplus-gx/core/input_hw/gamepad.c

@@ -40,13 +40,6 @@
 #include "shared.h"
 #include "gamepad.h"
 
-struct
-{
-  uint8 State;
-  uint8 Counter;
-  uint8 Timeout;
-} gamepad[MAX_DEVICES];
-
 uint8 pad_index;
 
 

genplus-gx/core/input_hw/input.h

@@ -137,6 +137,13 @@ typedef struct
   int y_offset;                 /* gun vertical offset */
 } t_input;
 
+struct
+{
+  uint8 State;
+  uint8 Counter;
+  uint8 Timeout;
+} gamepad[MAX_DEVICES];
+
 /* Global variables */
 extern t_input input;
 extern int old_system[2];

genplus-gx/core/state.c

@@ -100,6 +100,7 @@ int state_load(unsigned char *state)
 
   /* IO */
   load_param(io_reg, sizeof(io_reg));
+  load_param(gamepad, sizeof(gamepad));
   if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
   {
     io_reg[0] = region_code | 0x20 | (config.bios & 1);
@@ -221,6 +222,7 @@ int state_save(unsigned char *state)
 
   /* IO */
   save_param(io_reg, sizeof(io_reg));
+  save_param(gamepad, sizeof(gamepad));
 
   /* VDP */
   bufferptr += vdp_context_save(&state[bufferptr]);