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Diffstat (limited to 'src/devices/machine/i2cmem.cpp')
-rw-r--r--src/devices/machine/i2cmem.cpp121
1 files changed, 87 insertions, 34 deletions
diff --git a/src/devices/machine/i2cmem.cpp b/src/devices/machine/i2cmem.cpp
index 94670ff5326..34e75569a49 100644
--- a/src/devices/machine/i2cmem.cpp
+++ b/src/devices/machine/i2cmem.cpp
@@ -58,8 +58,14 @@ static inline void ATTR_PRINTF( 3, 4 ) verboselog( device_t *device, int n_level
//**************************************************************************
// device type definition
-DEFINE_DEVICE_TYPE(I2CMEM, i2cmem_device, "i2cmem", "I2C Memory")
-DEFINE_DEVICE_TYPE(X2404P, x2404p_device, "x2404p", "X2404P I2C Memory")
+DEFINE_DEVICE_TYPE(I2CMEM, i2cmem_device, "i2cmem", "I2C Memory")
+DEFINE_DEVICE_TYPE(I2C_X2404P, i2c_x2404p_device, "x2404p", "X2404P I2C Memory")
+DEFINE_DEVICE_TYPE(I2C_24C01, i2c_24c01_device, "24c01", "24C01 I2C Memory")
+DEFINE_DEVICE_TYPE(I2C_24C02, i2c_24c02_device, "24c02", "24C02 I2C Memory")
+DEFINE_DEVICE_TYPE(I2C_24C08, i2c_24c08_device, "24c08", "24C08 I2C Memory")
+DEFINE_DEVICE_TYPE(I2C_24C16, i2c_24c16_device, "24c16", "24C16 I2C Memory")
+DEFINE_DEVICE_TYPE(I2C_24C16A, i2c_24c16a_device, "24c16a", "24C16A I2C Memory")
+DEFINE_DEVICE_TYPE(I2C_24C64, i2c_24c64_device, "24c64", "24C64 I2C Memory")
//**************************************************************************
// LIVE DEVICE
@@ -69,36 +75,76 @@ DEFINE_DEVICE_TYPE(X2404P, x2404p_device, "x2404p", "X2404P I2C Memory")
// i2cmem_device - constructor
//-------------------------------------------------
-i2cmem_device::i2cmem_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
- : device_t(mconfig, type, tag, owner, clock),
+i2cmem_device::i2cmem_device(
+ const machine_config &mconfig,
+ device_type type,
+ const char *tag,
+ device_t *owner,
+ uint32_t clock,
+ int page_size,
+ int data_size) :
+ device_t(mconfig, type, tag, owner, clock),
device_nvram_interface(mconfig, *this),
m_region(*this, DEVICE_SELF),
- m_slave_address( I2CMEM_SLAVE_ADDRESS ),
- m_page_size( 0 ),
- m_data_size( 0 ),
- m_scl( 0 ),
- m_sdaw( 0 ),
- m_e0( 0 ),
- m_e1( 0 ),
- m_e2( 0 ),
- m_wc( 0 ),
- m_sdar( 1 ),
- m_state( STATE_IDLE ),
- m_shift( 0 ),
- m_byteaddr( 0 )
+ m_slave_address(I2CMEM_SLAVE_ADDRESS),
+ m_page_size(page_size),
+ m_data_size(data_size),
+ m_scl(0),
+ m_sdaw(0),
+ m_e0(0),
+ m_e1(0),
+ m_e2(0),
+ m_wc(0),
+ m_sdar(1),
+ m_state(STATE_IDLE),
+ m_shift(0),
+ m_byteaddr(0),
+ m_page_offset(0),
+ m_page_written_size(0),
+ m_in_write(false)
{
+ // these memories work off the I2C clock only
+ assert(!clock);
}
-i2cmem_device::i2cmem_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
- : i2cmem_device(mconfig, I2CMEM, tag, owner, clock)
+i2cmem_device::i2cmem_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ i2cmem_device(mconfig, I2CMEM, tag, owner, clock, 0, 0)
{
}
-x2404p_device::x2404p_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
- : i2cmem_device(mconfig, X2404P, tag, owner, clock)
+i2c_x2404p_device::i2c_x2404p_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ i2cmem_device(mconfig, I2C_X2404P, tag, owner, clock, 8, 0x200)
+{
+}
+
+i2c_24c01_device::i2c_24c01_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ i2cmem_device(mconfig, I2C_24C01, tag, owner, clock, 4, 0x80)
+{
+}
+
+i2c_24c02_device::i2c_24c02_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ i2cmem_device(mconfig, I2C_24C02, tag, owner, clock, 4, 0x100)
+{
+}
+
+i2c_24c08_device::i2c_24c08_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ i2cmem_device(mconfig, I2C_24C08, tag, owner, clock, 0, 0x400)
+{
+}
+
+i2c_24c16_device::i2c_24c16_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ i2cmem_device(mconfig, I2C_24C16, tag, owner, clock, 8, 0x800)
+{
+}
+
+i2c_24c16a_device::i2c_24c16a_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ i2cmem_device(mconfig, I2C_24C16A, tag, owner, clock, 0, 0x800)
+{
+}
+
+i2c_24c64_device::i2c_24c64_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ i2cmem_device(mconfig, I2C_24C64, tag, owner, clock, 8, 0x2000)
{
- set_page_size(8);
- set_data_size(0x200);
}
//-------------------------------------------------
@@ -122,6 +168,9 @@ void i2cmem_device::device_start()
save_item( NAME(m_shift) );
save_item( NAME(m_devsel) );
save_item( NAME(m_byteaddr) );
+ save_item( NAME(m_in_write) );
+ save_item( NAME(m_page_offset) );
+ save_item( NAME(m_page_written_size) );
save_pointer( &m_data[0], "m_data", m_data_size );
if ( m_page_size > 0 )
{
@@ -136,6 +185,7 @@ void i2cmem_device::device_start()
void i2cmem_device::device_reset()
{
+ m_in_write = false;
}
@@ -237,6 +287,15 @@ WRITE_LINE_MEMBER( i2cmem_device::write_sda )
{
if( m_sdaw )
{
+ if( m_in_write )
+ {
+ int base = data_offset();
+ int root = base & ~( m_page_size - 1);
+ for( int i=0; i < m_page_written_size; i++)
+ m_data[root | ((base + i) & (m_page_size - 1))] = m_page[i];
+ m_in_write = false;
+ verboselog( this, 1, "data[ %04x to %04x ] = %x bytes\n", base, root | ((base + m_page_written_size - 1) & (m_page_size - 1)), m_page_written_size );
+ }
verboselog( this, 1, "stop\n" );
m_state = STATE_IDLE;
}
@@ -301,6 +360,7 @@ WRITE_LINE_MEMBER( i2cmem_device::write_scl )
case STATE_BYTEADDR:
m_byteaddr = m_shift;
m_page_offset = 0;
+ m_page_written_size = 0;
verboselog( this, 1, "byteaddr %02x\n", m_byteaddr );
@@ -315,23 +375,16 @@ WRITE_LINE_MEMBER( i2cmem_device::write_scl )
}
else if( m_page_size > 0 )
{
+ m_in_write = true;
m_page[ m_page_offset ] = m_shift;
verboselog( this, 1, "page[ %04x ] <- %02x\n", m_page_offset, m_page[ m_page_offset ] );
m_page_offset++;
if( m_page_offset == m_page_size )
- {
- int offset = data_offset() & ~( m_page_size - 1 );
-
- verboselog( this, 1, "data[ %04x to %04x ] = page\n", offset, offset + m_page_size - 1 );
-
- for( int i = 0; i < m_page_size; i++ )
- {
- m_data[offset + i] = m_page[ i ];
- }
-
m_page_offset = 0;
- }
+ m_page_written_size++;
+ if( m_page_written_size > m_page_size)
+ m_page_written_size = m_page_size;
}
else
{