gpgx: port some svp changes from old branch. that game sucked

BizHawk.Emulation.Cores/Consoles/Sega/gpgx64/GPGX.cs

@@ -48,7 +48,8 @@ namespace BizHawk.Emulation.Cores.Consoles.Sega.gpgx64
 				SbrkHeapSizeKB = 256,
 				SealedHeapSizeKB = 36 * 1024,
 				InvisibleHeapSizeKB = 4 * 1024,
-				PlainHeapSizeKB = 64
+				PlainHeapSizeKB = 64,
+				MmapHeapSizeKB = 512
 			});
 
 			using (_elf.EnterExit())

waterbox/gpgx/core/cart_hw/svp/svp.c

@@ -1,49 +1,83 @@
-/*
-   basic, incomplete SSP160x (SSP1601?) interpreter
-   with SVP memory controller emu
-
-   (c) Copyright 2008, Grazvydas "notaz" Ignotas
-   Free for non-commercial use.
-
-   For commercial use, separate licencing terms must be obtained.
-
-   Modified for Genesis Plus GX (Eke-Eke): added BIG ENDIAN support, fixed addr/code inversion
-*/
-
-#include "shared.h"
-
-svp_t *svp = NULL;
-
-void svp_init(void)
-{
-  svp = malloc(sizeof(svp_t));
-  memset(svp, 0, sizeof(*svp));
-}
-
-void svp_reset(void)
-{
-  memcpy(svp->iram_rom + 0x800, cart.rom + 0x800, 0x20000 - 0x800);
-  ssp1601_reset(&svp->ssp1601);
-}
-
-void svp_write_dram(uint32 address, uint32 data)
-{
-  *(uint16 *)(svp->dram + (address & 0x1fffe)) = data;
-  if ((address == 0x30fe06) && data) svp->ssp1601.emu_status &= ~SSP_WAIT_30FE06;
-  if ((address == 0x30fe08) && data) svp->ssp1601.emu_status &= ~SSP_WAIT_30FE08;
-}
-
-uint32 svp_read_cell_1(uint32 address)
-{
-  address >>= 1;
-  address = (address & 0x7001) | ((address & 0x3e) << 6) | ((address & 0xfc0) >> 5);
-  return *(uint16 *)(svp->dram + (address & 0x1fffe));
-}
-
-uint32 svp_read_cell_2(uint32 address)
-{
-  address >>= 1;
-  address = (address & 0x7801) | ((address & 0x1e) << 6) | ((address & 0x7e0) >> 4);
-  return *(uint16 *)(svp->dram + (address & 0x1fffe));
-}
-
+/*
+basic, incomplete SSP160x (SSP1601?) interpreter
+with SVP memory controller emu
+(c) Copyright 2008, Grazvydas "notaz" Ignotas
+Free for non-commercial use.
+For commercial use, separate licencing terms must be obtained.
+Modified for Genesis Plus GX (Eke-Eke): added BIG ENDIAN support, fixed addr/code inversion
+*/
+
+#include "shared.h"
+
+svp_t *svp;
+
+static void svp_write_dram(uint32 address, uint32 data)
+{
+	*(uint16 *)(svp->dram + (address & 0x1fffe)) = data;
+	if (data)
+	{
+		if (address == 0x30fe06)
+			svp->ssp1601.emu_status &= ~SSP_WAIT_30FE06;
+		else if (address == 0x30fe08)
+			svp->ssp1601.emu_status &= ~SSP_WAIT_30FE08;
+	}
+}
+
+static uint32 svp_read_cell_1(uint32 address)
+{
+	address = (address & 0xe002) | ((address & 0x7c) << 6) | ((address & 0x1f80) >> 5);
+	return *(uint16 *)(svp->dram + address);
+}
+
+static uint32 svp_read_cell_2(uint32 address)
+{
+	address = (address & 0xf002) | ((address & 0x3c) << 6) | ((address & 0xfc0) >> 4);
+	return *(uint16 *)(svp->dram + address);
+}
+
+static uint32 svp_read_cell_byte(uint32 address)
+{
+	uint16 data = m68k.memory_map[address >> 16].read16(address);
+
+	if (address & 0x01)
+	{
+		return (data & 0xff);
+	}
+
+	return (data >> 8);
+}
+
+void svp_init(void)
+{
+	svp = malloc(sizeof(*svp));
+	memset(svp, 0, sizeof(*svp));
+
+	m68k.memory_map[0x30].base = svp->dram;
+	m68k.memory_map[0x30].read8 = NULL;
+	m68k.memory_map[0x30].read16 = NULL;
+	m68k.memory_map[0x30].write8 = NULL;
+	m68k.memory_map[0x30].write16 = svp_write_dram;
+	zbank_memory_map[0x30].read = NULL;
+	zbank_memory_map[0x30].write = NULL;
+
+	m68k.memory_map[0x31].base = svp->dram + 0x10000;
+	m68k.memory_map[0x31].read8 = NULL;
+	m68k.memory_map[0x31].read16 = NULL;
+	m68k.memory_map[0x31].write8 = NULL;
+	m68k.memory_map[0x31].write16 = NULL;
+	zbank_memory_map[0x31].read = NULL;
+	zbank_memory_map[0x31].write = NULL;
+
+	m68k.memory_map[0x39].read8 = svp_read_cell_byte;
+	m68k.memory_map[0x39].read16 = svp_read_cell_1;
+	zbank_memory_map[0x39].read = svp_read_cell_byte;
+	m68k.memory_map[0x3a].read8 = svp_read_cell_byte;
+	m68k.memory_map[0x3a].read16 = svp_read_cell_2;
+	zbank_memory_map[0x3a].read = svp_read_cell_byte;
+}
+
+void svp_reset(void)
+{
+	memcpy(svp->iram_rom + 0x800, cart.rom + 0x800, 0x20000 - 0x800);
+	ssp1601_reset(&svp->ssp1601);
+}

waterbox/gpgx/core/cart_hw/svp/svp.h

@@ -1,33 +1,30 @@
-/*
-   basic, incomplete SSP160x (SSP1601?) interpreter
-   with SVP memory controller emu
-
-   (c) Copyright 2008, Grazvydas "notaz" Ignotas
-   Free for non-commercial use.
-
-   For commercial use, separate licencing terms must be obtained.
-
-   Modified for Genesis Plus GX (Eke-Eke): added BIG ENDIAN support, fixed addr/code inversion
-*/
-
-#ifndef _SVP_H_
-#define _SVP_H_
-
-#include "shared.h"
-#include "ssp16.h"
-
-typedef struct {
-  unsigned char iram_rom[0x20000]; /* IRAM (0-0x7ff) and program ROM (0x800-0x1ffff) */
-  unsigned char dram[0x20000];
-  ssp1601_t ssp1601;
-} svp_t;
-
-extern svp_t *svp;
-
-extern void svp_init(void);
-extern void svp_reset(void);
-extern void svp_write_dram(uint32 address, uint32 data);
-extern uint32 svp_read_cell_1(uint32 address);
-extern uint32 svp_read_cell_2(uint32 address);
-
-#endif
+/*
+   basic, incomplete SSP160x (SSP1601?) interpreter
+   with SVP memory controller emu
+
+   (c) Copyright 2008, Grazvydas "notaz" Ignotas
+   Free for non-commercial use.
+
+   For commercial use, separate licencing terms must be obtained.
+
+   Modified for Genesis Plus GX (Eke-Eke): added BIG ENDIAN support, fixed addr/code inversion
+*/
+
+#ifndef _SVP_H_
+#define _SVP_H_
+
+#include "shared.h"
+#include "ssp16.h"
+
+typedef struct {
+  unsigned char iram_rom[0x20000]; /* IRAM (0-0x7ff) and program ROM (0x800-0x1ffff) */
+  unsigned char dram[0x20000];
+  ssp1601_t ssp1601;
+} svp_t;
+
+extern svp_t *svp;
+
+extern void svp_init(void);
+extern void svp_reset(void);
+
+#endif