[Core/General] added optional dynamic allocation of cartridge/CD hardware buffer

core/cart_hw/md_cart.h

@@ -44,7 +44,11 @@
 #ifndef _MD_CART_H_
 #define _MD_CART_H_
 
+#ifdef USE_DYNAMIC_ALLOC
+#define cart ext->md_cart
+#else
 #define cart ext.md_cart
+#endif
 
 /* Lock-On cartridge type */
 #define TYPE_GG 0x01  /* Game Genie */

core/cd_hw/scd.h

@@ -44,7 +44,11 @@
 #include "pcm.h"
 #include "cd_cart.h"
 
+#ifdef USE_DYNAMIC_ALLOC
+#define scd ext->cd_hw
+#else
 #define scd ext.cd_hw
+#endif
 
 /* 5000000 SCD clocks/s = ~3184 clocks/line with a Master Clock of 53.693175 MHz */
 /* This would be slightly (~30 clocks) more on PAL systems because of the slower */

core/genesis.c

@@ -41,7 +41,11 @@
 
 #include "shared.h"
 
-external_t ext;           /* External Hardware (Cartridge, CD unit, ...) */
+#ifdef USE_DYNAMIC_ALLOC
+external_t *ext;
+#else                     /* External Hardware (Cartridge, CD unit, ...) */
+external_t ext;
+#endif
 uint8 boot_rom[0x800];    /* Genesis BOOT ROM   */
 uint8 work_ram[0x10000];  /* 68K RAM  */
 uint8 zram[0x2000];       /* Z80 RAM  */

core/genesis.h

@@ -54,7 +54,11 @@ typedef union
 } external_t;
 
 /* Global variables */
+#ifdef USE_DYNAMIC_ALLOC
+extern external_t *ext;
+#else
 extern external_t ext;
+#endif
 extern uint8 boot_rom[0x800];
 extern uint8 work_ram[0x10000];
 extern uint8 zram[0x2000];