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Haze: Some small improvements, so that it loads and executes more of the program from the flash rom.

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This commit is contained in:
Scott Stone 2011-11-01 00:51:49 +00:00
parent 05a0d5895b
commit 1ffa1dde05
1 changed files with 149 additions and 4 deletions
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153
src/mame/drivers/nexus3d.c
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@ -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 )