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[mess] make playstation memory cards load and save to a file [Carl]

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This commit is contained in:
cracyc 2013-01-18 18:48:32 +00:00
parent c40207b0f1
commit 96c4ec5cb2
2 changed files with 57 additions and 17 deletions
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55
src/mess/machine/psxcard.c
View File

@ -19,6 +19,9 @@
//
//
static const int block_size = 128;
static const int card_size = block_size * 1024;
const device_type PSXCARD = &device_creator<psxcard_device>;
enum transfer_states
@ -37,16 +40,13 @@ enum transfer_states
};
psxcard_device::psxcard_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, PSXCARD, "Sony PSX Memory Card", tag, owner, clock)
: device_t(mconfig, PSXCARD, "Sony PSX Memory Card", tag, owner, clock),
device_image_interface(mconfig, *this)
{
}
void psxcard_device::device_start()
{
cache=new unsigned char [128*1024];
memset(cache, 0, 128*1024);
m_owner = dynamic_cast<psx_controller_port_device *>(owner());
m_ack_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(psxcard_device::ack_timer), this));
@ -77,6 +77,11 @@ void psxcard_device::device_reset()
m_owner->ack();
}
void psxcard_device::device_config_complete()
{
update_names(PSXCARD, "memcard", "mc");
}
//
//
//
@ -88,7 +93,7 @@ bool psxcard_device::transfer(UINT8 to, UINT8 *from)
switch (state)
{
case state_illegal:
if (to == 0x81)
if ((to == 0x81) && is_loaded())
{
// printf("CARD: begin\n");
state = state_command;
@ -233,12 +238,13 @@ void psxcard_device::read_card(const unsigned short addr, unsigned char *buf)
printf("card: read block %d\n",addr);
#endif
if (addr<1024)
if (addr<(card_size/block_size))
{
memcpy(buf,cache+(addr*128),128);
fseek(addr*block_size, SEEK_SET);
fread(buf, block_size);
} else
{
memset(buf,0,128);
memset(buf,0,block_size);
}
}
@ -252,16 +258,13 @@ void psxcard_device::write_card(const unsigned short addr, unsigned char *buf)
printf("card: write block %d\n",addr);
#endif
if (addr<1024)
if (addr<(card_size/block_size))
{
memcpy(cache+(addr*128),buf,128);
fseek(addr*block_size, SEEK_SET);
fwrite(buf, block_size);
}
}
//
//
//
unsigned char psxcard_device::checksum_data(const unsigned char *buf, const unsigned int sz)
{
unsigned char chk=*buf++;
@ -270,6 +273,28 @@ unsigned char psxcard_device::checksum_data(const unsigned char *buf, const unsi
return chk;
}
bool psxcard_device::call_load()
{
if(length() != card_size)
return IMAGE_INIT_FAIL;
return IMAGE_INIT_PASS;
}
bool psxcard_device::call_create(int format_type, option_resolution *format_options)
{
UINT8 block[block_size];
int i, ret;
memset(block, '\0', block_size);
for(i = 0; i < (card_size/block_size); i++)
{
ret = fwrite(block, block_size);
if(ret != block_size)
return IMAGE_INIT_FAIL;
}
return IMAGE_INIT_PASS;
}
void psxcard_device::do_card()
{
if(!m_bit)

19
src/mess/machine/psxcard.h
View File

@ -10,13 +10,27 @@ class psx_controller_port_device;
#define MCFG_PSXCARD_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, PSXCARD, 0)
class psxcard_device : public device_t
class psxcard_device : public device_t,
public device_image_interface
{
public:
psxcard_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
virtual iodevice_t image_type() const { return IO_MEMCARD; }
virtual bool is_readable() const { return 1; }
virtual bool is_writeable() const { return 1; }
virtual bool is_creatable() const { return 1; }
virtual bool must_be_loaded() const { return 0; }
virtual bool is_reset_on_load() const { return 0; }
virtual const char *file_extensions() const { return "mc"; }
virtual const option_guide *create_option_guide() const { return NULL; }
virtual bool call_load();
virtual bool call_create(int format_type, option_resolution *format_options);
private:
unsigned char pkt[0x8b], pkt_ptr, pkt_sz, cmd, *cache;
unsigned char pkt[0x8b], pkt_ptr, pkt_sz, cmd;
unsigned short addr;
int state;
@ -44,6 +58,7 @@ private:
public:
virtual void device_start();
virtual void device_reset();
virtual void device_config_complete();
void clock_w(bool state) { if(m_clock && !m_sel && !state && !m_pad) do_card(); m_clock = state; }
void sel_w(bool state);