static WRITE8_HANDLER( ay_address_w )
{
othello_state *state = space->machine().driver_data<othello_state>();
if (state->m_ay_select & 1) ay8910_address_w(state->m_ay1, 0, data);
if (state->m_ay_select & 2) ay8910_address_w(state->m_ay2, 0, data);
}
static WRITE8_DEVICE_HANDLER( draco_sound_g_w )
{
cidelsa_state *state = (cidelsa_state *)device->machine->driver_data;
/*
G1 G0 description
0 0 IAB inactive
0 1 DWS write to PSG
1 0 DTB read from PSG
1 1 INTAK latch address
*/
switch (data)
{
case 0x01:
ay8910_data_w(device, 0, state->draco_ay_latch);
break;
case 0x02:
state->draco_ay_latch = ay8910_r(device, 0);
break;
case 0x03:
ay8910_address_w(device, 0, state->draco_ay_latch);
break;
}
}
static WRITE8_DEVICE_HANDLER( carnival_music_port_2_w )
{
static int psgSelect = 0;
int newSelect;
newSelect = data & ( MUSIC_PORT2_PSG_BDIR | MUSIC_PORT2_PSG_BC1 );
if ( psgSelect != newSelect )
{
psgSelect = newSelect;
switch ( psgSelect )
{
case PSG_BC_INACTIVE:
/* do nowt */
break;
case PSG_BC_READ:
/* not very sensible for a write */
break;
case PSG_BC_WRITE:
ay8910_data_w( device, 0, psgData );
break;
case PSG_BC_LATCH_ADDRESS:
ay8910_address_w( device, 0, psgData );
break;
}
}
}
void a2bus_arcboard_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data)
{
switch (offset)
{
case 2:
m_tms->vram_write(space, 0, data);
break;
case 3:
m_tms->register_write(space, 0, data);
break;
case 5:
ay8910_address_w(m_ay, space, 0, data);
break;
case 6:
ay8910_data_w(m_ay, space, 0, data);
break;
}
}
/* read/write data depending on state of bdir, bc1 pins and data output to psg */
static void oric_psg_connection_refresh(running_machine &machine)
{
oric_state *state = machine.driver_data<oric_state>();
if (state->m_psg_control!=0)
{
switch (state->m_psg_control)
{
/* PSG inactive */
case 0:
break;
/* read register data */
case 1:
{
//state->m_via_port_a_data = ay8910_read_port_0_r(space, 0);
}
break;
/* write register data */
case 2:
{
device_t *ay8912 = machine.device("ay8912");
ay8910_data_w(ay8912, 0, state->m_via_port_a_data);
}
break;
/* write register index */
case 3:
{
device_t *ay8912 = machine.device("ay8912");
ay8910_address_w(ay8912, 0, state->m_via_port_a_data);
}
break;
default:
break;
}
return;
}
}
static WRITE8_HANDLER( mermaid_ay8910_control_port_w )
{
mermaid_state *state = space->machine->driver_data<mermaid_state>();
if (state->ay8910_enable[0]) ay8910_address_w(state->ay1, offset, data);
if (state->ay8910_enable[1]) ay8910_address_w(state->ay2, offset, data);
}
static WRITE8_HANDLER(ay_address_w)
{
if(ay_select&1) ay8910_address_w(devtag_get_device(space->machine, "ay1"),0,data);
if(ay_select&2) ay8910_address_w(devtag_get_device(space->machine, "ay2"),0,data);
}
