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https://github.com/holub/mame
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konami/viper.cpp: feasibility study about the i2c attached analog chip
* make code1db playable with heavy GFX glitches
This commit is contained in:
angelosa
parent
79bef1e230
commit
2cf244ef3b
@ -99,6 +99,7 @@
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\- sscopex/sogeki desyncs during gameplay intro, leaves heavy trails in gameplay;
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- ppp2nd: hangs when selecting game mode from service (manages to save);
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- code1d, code1da, p9112: RTC self check bad;
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- code1db: crashes when selecting single course type;
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- thrild2c: blue screen;
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- thrild2ac: black screen;
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- all games needs to be verified against factory settings
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@ -473,6 +474,7 @@ public:
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m_workram(*this, "workram"),
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m_ds2430_rom(*this, "ds2430"),
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m_io_ports(*this, "IN%u", 0U),
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m_analog_input(*this, "AN%u", 0U),
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m_gun_input(*this, "GUN%u", 0U),
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m_io_ppp_sensors(*this, "SENSOR%u", 1U),
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m_dmadac(*this, { "dacr", "dacl" })
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@ -637,6 +639,8 @@ private:
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uint8_t cr = 0U;
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uint8_t sr = 0U;
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int state = 0;
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uint8_t addr_latch = 0U;
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bool rw = 0;
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emu_timer *timer = nullptr;
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};
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@ -675,6 +679,7 @@ private:
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required_shared_ptr<uint64_t> m_workram;
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required_region_ptr<uint8_t> m_ds2430_rom;
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required_ioport_array<8> m_io_ports;
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required_ioport_array<4> m_analog_input;
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required_ioport_array<4> m_gun_input;
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optional_ioport_array<4> m_io_ppp_sensors;
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required_device_array<dmadac_sound_device, 2> m_dmadac;
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@ -798,6 +803,7 @@ void viper_state::pci_config_data_w(uint64_t data)
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uint8_t viper_state::i2cdr_r(offs_t offset)
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{
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u8 res = 0;
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if (m_i2c.cr & 0x80 && !machine().side_effects_disabled()) // only do anything if the I2C module is enabled
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{
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if (m_i2c.state == I2C_STATE_ADDRESS_CYCLE)
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@ -817,6 +823,34 @@ uint8_t viper_state::i2cdr_r(offs_t offset)
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// set transfer complete in status register
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m_i2c.sr |= 0x80;
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if (m_i2c.rw)
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{
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if ((m_i2c.addr_latch & 0xf0) == 0x10)
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{
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// TODO: hackish direct read
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// What should really happen here is that i2c initiates a transfer with
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// connected devices in serial form, cycling thru the various devices.
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// The hard part is to drive the adc (which has 4 write and 2 read lines)
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// with only sda/scl, and assuming it is really adc and the Guru note doesn't
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// refer to boxingm instead.
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// 0x1c: voltage, assume 5v
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if (m_i2c.addr_latch == 0x1c)
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return 0x80;
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const u16 adc_value = m_analog_input[m_i2c.addr_latch & 0x3]->read();
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// FIXME: upper nibble is currently discarded in port defs
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// is it expecting 7 bits of data and 1 of parity?
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// cfr. input tests returning different values for each nibble when both are equal.
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const u8 adc_nibble = BIT(m_i2c.addr_latch, 2) ? 0 : 8;
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res = (adc_value) >> adc_nibble;
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}
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else
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LOG("I2C: unmapped read access %02x\n", m_i2c.addr_latch);
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}
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else
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LOG("I2C: read access %02x in write mode!\n", m_i2c.addr_latch);
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// generate interrupt if interrupt are enabled
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/*if (m_i2c.cr & 0x40)
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{
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@ -829,7 +863,7 @@ uint8_t viper_state::i2cdr_r(offs_t offset)
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}
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}
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return 0;
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return res;
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}
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void viper_state::i2cdr_w(offs_t offset, uint8_t data)
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@ -839,16 +873,19 @@ void viper_state::i2cdr_w(offs_t offset, uint8_t data)
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if (m_i2c.state == I2C_STATE_ADDRESS_CYCLE) // waiting for address cycle
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{
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//int rw = data & 1;
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int addr = (data >> 1) & 0x7f;
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LOGI2C("I2C address cycle, addr = %02X\n", addr);
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m_i2c.rw = bool(data & 1);
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m_i2c.addr_latch = (data >> 1) & 0x7f;
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LOGI2C("I2C address cycle %s, addr = %02X \n"
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, m_i2c.rw ? "read" : "write"
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, m_i2c.addr_latch
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);
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m_i2c.state = I2C_STATE_DATA_TRANSFER;
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m_i2c.timer->adjust(attotime::from_hz(I2C_TIMER_FREQ));
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}
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else if (m_i2c.state == I2C_STATE_DATA_TRANSFER) // waiting for data transfer
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{
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LOGI2C("I2C data transfer, data = %02X\n", data);
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LOGI2C("I2C data transfer, data = %02x\n", data);
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m_i2c.state = I2C_STATE_ADDRESS_CYCLE;
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m_i2c.timer->adjust(attotime::from_hz(I2C_TIMER_FREQ));
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@ -1969,7 +2006,7 @@ void viper_state::viper_map(address_map &map)
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map(0xffe28000, 0xffe28007).nopr(); // sscopex busy flag for secondary screen?
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// boxingm reads and writes here to read the pad sensor values, 2nd adc?
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// $10 bit 7 (w) clk_write, $18 bit 7 (r) do_read
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// map(0xffe28008, 0xffe2801f).noprw();
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// map(0xffe28008, 0xffe2801f).noprw();
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map(0xffe30000, 0xffe31fff).rw("m48t58", FUNC(timekeeper_device::read), FUNC(timekeeper_device::write));
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map(0xffe40000, 0xffe4000f).noprw();
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map(0xffe50000, 0xffe50007).w(FUNC(viper_state::unk2_w));
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@ -2114,6 +2151,18 @@ static INPUT_PORTS_START( viper )
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PORT_START("GUN3")
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PORT_BIT( 0xffff, IP_ACTIVE_LOW, IPT_UNUSED )
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PORT_START("AN0")
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PORT_BIT( 0xffff, IP_ACTIVE_LOW, IPT_UNUSED )
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PORT_START("AN1")
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PORT_BIT( 0xffff, IP_ACTIVE_LOW, IPT_UNUSED )
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PORT_START("AN2")
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PORT_BIT( 0xffff, IP_ACTIVE_LOW, IPT_UNUSED )
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PORT_START("AN3")
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PORT_BIT( 0xffff, IP_ACTIVE_LOW, IPT_UNUSED )
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INPUT_PORTS_END
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INPUT_PORTS_START( ppp2nd )
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@ -2179,13 +2228,26 @@ INPUT_PORTS_START( thrild2 )
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PORT_MODIFY("IN4")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("Shift Up")
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// TODO: analog channels
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// TODO: normal type steering wheel (non-K type)
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PORT_MODIFY("AN0")
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PORT_BIT( 0xfff, 0x000, IPT_PADDLE ) PORT_NAME("Steering Wheel") PORT_MINMAX(0x800,0x7ff) PORT_SENSITIVITY(50) PORT_KEYDELTA(50)
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PORT_MODIFY("AN1")
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PORT_BIT( 0xff, 0x00, IPT_PEDAL ) PORT_NAME("Gas Pedal") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(25) PORT_REVERSE
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PORT_MODIFY("AN2")
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PORT_BIT( 0xff, 0x00, IPT_PEDAL2 ) PORT_NAME("Brake Pedal") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(25) PORT_REVERSE
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INPUT_PORTS_END
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INPUT_PORTS_START( gticlub2 )
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PORT_INCLUDE( thrild2 )
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// TODO: specific analog channel for hand brake
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// K-Type steering wheel
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PORT_MODIFY("AN0")
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PORT_BIT( 0xff, 0x80, IPT_PADDLE ) PORT_NAME("Steering Wheel") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(50) PORT_REVERSE
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PORT_MODIFY("AN3")
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PORT_BIT( 0xff, 0x00, IPT_PEDAL3 ) PORT_NAME("Handbrake Lever") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(100) PORT_KEYDELTA(25) PORT_REVERSE
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INPUT_PORTS_END
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INPUT_PORTS_START( gticlub2ea )
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@ -2215,6 +2277,7 @@ INPUT_PORTS_START( boxingm )
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PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("BodyPad R")
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PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) // memory card check for boxingm (actually comms enable?)
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// TODO: non-i2c analog ports
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INPUT_PORTS_END
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INPUT_PORTS_START( jpark3 )
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@ -2425,6 +2488,8 @@ INPUT_PORTS_START( wcombat )
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PORT_MODIFY("IN4")
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PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN ) // X flip screen
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// TODO: whatever it reads from the i2c analog ports (needs service mode)
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INPUT_PORTS_END
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INPUT_PORTS_START( xtrial )
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@ -2443,16 +2508,31 @@ INPUT_PORTS_START( xtrial )
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PORT_MODIFY("IN4")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("Shift Up")
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// virtually identical to gticlub
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PORT_MODIFY("AN0")
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PORT_BIT( 0xff, 0x80, IPT_PADDLE ) PORT_NAME("Steering Wheel") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(50) PORT_REVERSE
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PORT_MODIFY("AN1")
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PORT_BIT( 0xff, 0x00, IPT_PEDAL ) PORT_NAME("Gas Pedal") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(25) PORT_REVERSE
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PORT_MODIFY("AN2")
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PORT_BIT( 0xff, 0x00, IPT_PEDAL2 ) PORT_NAME("Brake Pedal") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(25) PORT_REVERSE
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PORT_MODIFY("AN3")
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PORT_BIT( 0xff, 0x00, IPT_PEDAL3 ) PORT_NAME("Handbrake Lever") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(100) PORT_KEYDELTA(25) PORT_REVERSE
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INPUT_PORTS_END
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INPUT_PORTS_START( code1d )
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PORT_INCLUDE( viper )
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PORT_MODIFY("IN2")
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PORT_DIPNAME( 0x01, 0x00, "DIP4" ) PORT_DIPLOCATION("SW:4") // Unknown, but without this set the game won't display anything besides a blue screen
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// Unknown, but without this set the game won't display anything besides a blue screen
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PORT_DIPNAME( 0x01, 0x00, "DIP4" ) PORT_DIPLOCATION("SW:4")
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PORT_DIPSETTING( 0x01, DEF_STR( Off ) )
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PORT_DIPSETTING( 0x00, DEF_STR( On ) )
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PORT_DIPNAME( 0x04, 0x00, "Calibrate Controls On Boot" ) PORT_DIPLOCATION("SW:2") // Game crashes during boot when this is on
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// needs it to be on otherwise analog inputs won't work in gameplay
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PORT_DIPNAME( 0x04, 0x04, "Calibrate Controls On Boot" ) PORT_DIPLOCATION("SW:2")
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PORT_DIPSETTING( 0x04, DEF_STR( Yes ) )
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PORT_DIPSETTING( 0x00, DEF_STR( No ) )
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PORT_DIPNAME( 0x08, 0x00, "Memory Card Check On Boot" ) PORT_DIPLOCATION("SW:1")
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@ -2462,6 +2542,14 @@ INPUT_PORTS_START( code1d )
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PORT_MODIFY("IN4")
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PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("Action Button")
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PORT_MODIFY("AN0")
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PORT_BIT( 0xff, 0x80, IPT_PADDLE ) PORT_NAME("Steering Wheel") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(50) PORT_REVERSE
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PORT_MODIFY("AN1")
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PORT_BIT( 0xff, 0x00, IPT_PEDAL ) PORT_NAME("Gas Pedal") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(25) PORT_REVERSE
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PORT_MODIFY("AN2")
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PORT_BIT( 0xff, 0x00, IPT_PEDAL2 ) PORT_NAME("Brake Pedal") PORT_MINMAX(0x00,0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(25) PORT_REVERSE
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INPUT_PORTS_END
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/*****************************************************************************/
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