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315-5649: populate features for future use

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This commit is contained in:
MetalliC 2019-11-07 18:48:33 +02:00
parent 07d757a2ed
commit 5fac736bf1
2 changed files with 28 additions and 6 deletions
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30
src/mame/machine/315_5649.cpp
View File

@ -36,7 +36,9 @@ sega_315_5649_device::sega_315_5649_device(const machine_config &mconfig, const
m_out_port_cb{ {*this}, {*this}, {*this}, {*this}, {*this}, {*this}, {*this} },
m_an_port_cb{ {*this}, {*this}, {*this}, {*this}, {*this}, {*this}, {*this}, {*this} },
m_serial_rd_cb{ {*this}, {*this} }, m_serial_wr_cb{ {*this}, {*this} },
m_cnt_cb{ {*this}, {*this}, {*this}, {*this} },
m_port_config(0),
m_mode(0),
m_analog_channel(0)
{
std::fill(std::begin(m_port_value), std::end(m_port_value), 0xff);
@ -60,14 +62,20 @@ void sega_315_5649_device::device_start()
for (unsigned i = 0; i < 2; i++)
{
m_serial_rd_cb[i].resolve_safe(0xff);
m_serial_rd_cb[i].resolve_safe(0);
m_serial_wr_cb[i].resolve_safe();
}
for (unsigned i = 0; i < 4; i++)
{
m_cnt_cb[i].resolve_safe(0);
}
// register for save states
save_pointer(NAME(m_port_value), 7);
save_item(NAME(m_port_config));
save_item(NAME(m_analog_channel));
save_item(NAME(m_mode));
}
//-------------------------------------------------
@ -78,6 +86,7 @@ void sega_315_5649_device::device_reset()
{
// set all ports to input on reset
m_port_config = 0xff;
m_mode = 0;
}
@ -92,13 +101,20 @@ READ8_MEMBER( sega_315_5649_device::read )
switch (offset)
{
// port a to g
case 0x06:
if (m_mode & 0x80) // port G counter mode - 4x 16bit counters, auto-increments
{
data = m_cnt_cb[(m_port_value[6] >> 1) & 3](0) >> (((m_port_value[6] & 1) ^ 1) * 8);
if (!machine().side_effects_disabled())
m_port_value[6] = (m_port_value[6] & 0xf8) | ((m_port_value[6] + 1) & 7);
break;
}
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x06:
if (BIT(m_port_config, offset))
data = m_in_port_cb[offset](0);
else
@ -109,8 +125,8 @@ READ8_MEMBER( sega_315_5649_device::read )
case 0x0b: data = m_serial_rd_cb[0](0); break;
case 0x0c: data = m_serial_rd_cb[1](0); break;
// status
case 0x0d: break;
// serial status
case 0x0d: data = 0; break; // not implemented
// analog input, auto-increments
case 0x0f:
@ -138,7 +154,7 @@ WRITE8_MEMBER( sega_315_5649_device::write )
case 0x03:
case 0x04:
case 0x05:
case 0x06:
case 0x06: // when in counter mode, bit 7 - 0 reset counters (not implemented)
m_port_value[offset] = data;
m_out_port_cb[offset](data);
break;
@ -151,7 +167,9 @@ WRITE8_MEMBER( sega_315_5649_device::write )
case 0x0a: m_serial_wr_cb[1](data); break;
// mode register
case 0x0e: break;
case 0x0e:
m_mode = data;
break;
// analog mux select
case 0x0f:

4
src/mame/machine/315_5649.h
View File

@ -49,6 +49,8 @@ public:
auto serial_ch1_wr_callback() { return m_serial_wr_cb[0].bind(); }
auto serial_ch2_wr_callback() { return m_serial_wr_cb[1].bind(); }
template <unsigned N> auto in_counter_callback() { return m_cnt_cb[N].bind(); }
DECLARE_READ8_MEMBER(read);
DECLARE_WRITE8_MEMBER(write);
@ -64,9 +66,11 @@ private:
devcb_read8 m_an_port_cb[8];
devcb_read8 m_serial_rd_cb[2];
devcb_write8 m_serial_wr_cb[2];
devcb_read16 m_cnt_cb[4];
uint8_t m_port_value[7];
uint8_t m_port_config;
uint8_t m_mode;
int m_analog_channel;
};