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author Scott Stone <tafoid@users.noreply.github.com>2011-11-01 00:51:49 +0000
committer Scott Stone <tafoid@users.noreply.github.com>2011-11-01 00:51:49 +0000
commit1ffa1dde05a8ef972ea66902a795be6d614c8919 (patch)
tree50e3e5b36849ddaa69bb423c6d9118b78fd616a1 /src/mame/drivers/nexus3d.c
parent05a0d5895b834dc8f3bf55cf3cee4ed9ee3cb658 (diff)
Haze: Some small improvements, so that it loads and executes more of the program from the flash rom.
Diffstat (limited to 'src/mame/drivers/nexus3d.c')
-rw-r--r--src/mame/drivers/nexus3d.c153
1 files changed, 149 insertions, 4 deletions
diff --git a/src/mame/drivers/nexus3d.c b/src/mame/drivers/nexus3d.c
index bec7ab8dcaf..4777ae20cb9 100644
--- a/src/mame/drivers/nexus3d.c
+++ b/src/mame/drivers/nexus3d.c
@@ -16,17 +16,152 @@
#include "cpu/arm7/arm7core.h"
//#include "machine/i2cmem.h"
+
+#define FLASH_PAGE_SIZE (2048+64)
+
class nexus3d_state : public driver_device
{
public:
nexus3d_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag) { }
+ UINT32* m_mainram;
+
+ //
+ UINT8 m_last_flash_cmd;
+
+ int m_flash_addr_seq;
+ UINT32 m_flash_addr;
+
+ int m_flash_page_addr;
+ UINT8 flash_page_data[FLASH_PAGE_SIZE];
+
+ UINT8* m_flash_region;
+
};
+
+
+
+
+// Flash handling is very similar (but not 100% identical) to the stuff used in cavesh3 (command structure seems very slightly different, probably due to larger size)
+// this is just a skeleton implementation
+
+void nexus3d_flash_reset(running_machine& machine)
+{
+ nexus3d_state *state = machine.driver_data<nexus3d_state>();
+ state->m_last_flash_cmd = 0x00;
+ state->m_flash_addr_seq = 0;
+ state->m_flash_addr = 0;
+
+ state->m_flash_page_addr = 0;
+}
+
+READ8_HANDLER( n3d_flash_r )
+{
+ nexus3d_state *state = space->machine().driver_data<nexus3d_state>();
+
+ if (state->m_last_flash_cmd==0x70) return 0xe0;
+
+ if (state->m_last_flash_cmd==0x00)
+ {
+ UINT8 retdat = state->flash_page_data[state->m_flash_page_addr];
+
+ //logerror("n3d_flash_r %02x %04x\n", offset, state->m_flash_page_addr);
+
+ state->m_flash_page_addr++;
+ return retdat;
+ }
+
+
+ logerror("n3d_flash_r %02x\n", offset);
+ return 0x00;
+
+}
+
+
+WRITE8_HANDLER( n3d_flash_cmd_w )
+{
+ nexus3d_state *state = space->machine().driver_data<nexus3d_state>();
+ logerror("n3d_flash_cmd_w %02x %02x\n", offset, data);
+ state->m_last_flash_cmd = data;
+
+ if (data==0x00)
+ {
+ memcpy(state->flash_page_data, state->m_flash_region + state->m_flash_addr * FLASH_PAGE_SIZE, FLASH_PAGE_SIZE);
+
+ }
+
+}
+
+WRITE8_HANDLER( n3d_flash_addr_w )
+{
+ nexus3d_state *state = space->machine().driver_data<nexus3d_state>();
+// logerror("n3d_flash_addr_w %02x %02x\n", offset, data);
+
+ state->m_flash_addr_seq++;
+
+ if (state->m_flash_addr_seq==3)
+ state->m_flash_addr = (state->m_flash_addr & 0xffff00) | data;
+
+ if (state->m_flash_addr_seq==4)
+ state->m_flash_addr = (state->m_flash_addr & 0xff00ff) | data << 8;
+
+ if (state->m_flash_addr_seq==5)
+ state->m_flash_addr = (state->m_flash_addr & 0x00ffff) | data << 16;
+
+ if (state->m_flash_addr_seq==5)
+ {
+ state->m_flash_addr_seq = 0;
+ state->m_flash_page_addr = 0;
+ logerror("set flash block to %08x\n", state->m_flash_addr);
+ }
+
+}
+
+static READ32_HANDLER( nexus3d_unk_r )
+{
+ return space->machine().rand() ^ (space->machine().rand() << 16);
+}
+
+static READ32_HANDLER( nexus3d_unk2_r )
+{
+ return 0x00000000;//space->machine().rand() ^ (space->machine().rand() << 16);
+}
+
+static READ32_HANDLER( nexus3d_unk3_r )
+{
+ return 0x00000000;//space->machine().rand() ^ (space->machine().rand() << 16);
+}
+
+static WRITE32_HANDLER( nexus3d_unk2_w )
+{
+
+}
+
+static WRITE32_HANDLER( nexus3d_unk3_w )
+{
+
+}
+
static ADDRESS_MAP_START( nexus3d_map, AS_PROGRAM, 32 )
- AM_RANGE(0x00000000, 0x00000fff) AM_ROM AM_REGION("user1", 0)
+ AM_RANGE(0x00000000, 0x003fffff) AM_RAM AM_BASE_MEMBER(nexus3d_state, m_mainram)
+
+ AM_RANGE(0x00400000, 0x01ffffff) AM_RAM // ?? uploads various data, + pointers to data in the 0x01ffxxxx range, might be video system related
+
+ // flash
+ AM_RANGE(0x9C000000, 0x9C000003) AM_WRITE8( n3d_flash_r, 0xffffffff)
+ AM_RANGE(0x9C000010, 0x9C000013) AM_WRITE8( n3d_flash_cmd_w, 0xffffffff)
+ AM_RANGE(0x9C000018, 0x9C00001b) AM_WRITE8( n3d_flash_addr_w, 0xffffffff)
+
+ // lots of accesses in this range
+ AM_RANGE(0xC0000F44, 0xC0000F47) AM_READWRITE( nexus3d_unk2_r, nexus3d_unk2_w ) // often
+ AM_RANGE(0xC0000F4C, 0xC0000F4f) AM_READWRITE( nexus3d_unk3_r, nexus3d_unk3_w ) // often
+
+ AM_RANGE(0xE0000014, 0xE0000017) AM_READ( nexus3d_unk_r ) // sits waiting for this
+
+
ADDRESS_MAP_END
static INPUT_PORTS_START( nexus3d )
@@ -44,10 +179,15 @@ SCREEN_UPDATE(nexus3d)
return 0;
}
+static MACHINE_RESET (nexus3d)
+{
+ nexus3d_flash_reset(machine);
+}
+
static MACHINE_CONFIG_START( nexus3d, nexus3d_state )
/* basic machine hardware */
- MCFG_CPU_ADD("maincpu", ARM9, 200000000)
+ MCFG_CPU_ADD("maincpu", ARM920T, 200000000)
MCFG_CPU_PROGRAM_MAP(nexus3d_map)
MCFG_SCREEN_ADD("screen", RASTER)
@@ -60,6 +200,8 @@ static MACHINE_CONFIG_START( nexus3d, nexus3d_state )
MCFG_PALETTE_LENGTH(256)
+ MCFG_MACHINE_RESET( nexus3d )
+
MCFG_VIDEO_START(nexus3d)
MACHINE_CONFIG_END
@@ -72,7 +214,7 @@ MACHINE_CONFIG_END
// that the original game used a smaller flash. It seems highly unlikely that Examu would ship ROMs
// containing the entire backcatalog of SNK and Capcom material ;-)
//
-// It's possible this set should be marked as a bootleg due to this although I imagine the acutal valid
+// It's possible this set should be marked as a bootleg due to this although I imagine the actual valid
// part of the data will match a clean dump.
ROM_START( acheartf )
ROM_REGION( 0x42000898, "user1", 0 ) /* ARM 32 bit code */
@@ -91,7 +233,10 @@ ROM_END
static DRIVER_INIT( nexus3d )
{
-
+ nexus3d_state *state = machine.driver_data<nexus3d_state>();
+ // the first part of the flash ROM automatically gets copied to RAM
+ memcpy( state->m_mainram, machine.region("user1")->base(), 4 * 1024);
+ state->m_flash_region = machine.region("user1")->base();
}
GAME( 2006, acheartf, 0, nexus3d, nexus3d, nexus3d, ROT0, "Examu", "Arcana Heart Full", GAME_NO_SOUND|GAME_NOT_WORKING )