diff options
Diffstat (limited to 'src/mame/drivers/tb303.cpp')
-rw-r--r-- | src/mame/drivers/tb303.cpp | 146 |
1 files changed, 91 insertions, 55 deletions
diff --git a/src/mame/drivers/tb303.cpp b/src/mame/drivers/tb303.cpp index 62dfdce85e5..7596b78a4ce 100644 --- a/src/mame/drivers/tb303.cpp +++ b/src/mame/drivers/tb303.cpp @@ -2,8 +2,6 @@ // copyright-holders:hap /*************************************************************************** - ** subclass of hh_ucom4_state (includes/hh_ucom4.h, drivers/hh_ucom4.cpp) ** - Roland TB-303 Bass Line, 1982, designed by Tadao Kikumoto * NEC uCOM-43 MCU, labeled D650C 133 * 3*uPD444C 1024x4 Static CMOS SRAM @@ -15,43 +13,80 @@ ***************************************************************************/ #include "emu.h" -#include "includes/hh_ucom4.h" - +#include "cpu/ucom4/ucom4.h" +#include "video/pwm.h" #include "machine/timer.h" #include "tb303.lh" -class tb303_state : public hh_ucom4_state +class tb303_state : public driver_device { public: tb303_state(const machine_config &mconfig, device_type type, const char *tag) : - hh_ucom4_state(mconfig, type, tag) + driver_device(mconfig, type, tag), + m_maincpu(*this, "maincpu"), + m_display(*this, "display"), + m_inputs(*this, "IN.%u", 0) { } void tb303(machine_config &config); +protected: + virtual void machine_start() override; + private: + required_device<ucom4_cpu_device> m_maincpu; + required_device<pwm_display_device> m_display; + required_ioport_array<5> m_inputs; + u8 m_ram[0xc00]; + u8 m_ram_addrset[3]; u16 m_ram_address; + u8 m_ram_data; bool m_ram_ce; bool m_ram_we; + u8 m_led_data; + u8 m_inp_mux; - DECLARE_WRITE8_MEMBER(ram_w); - DECLARE_READ8_MEMBER(ram_r); - DECLARE_WRITE8_MEMBER(strobe_w); void refresh_ram(); + template<int N> DECLARE_WRITE8_MEMBER(ram_address_w); + DECLARE_WRITE8_MEMBER(ram_data_w); + DECLARE_READ8_MEMBER(ram_data_r); + DECLARE_WRITE8_MEMBER(strobe_w); - DECLARE_WRITE8_MEMBER(switch_w); - DECLARE_READ8_MEMBER(input_r); void update_leds(); + DECLARE_WRITE8_MEMBER(led_w); + DECLARE_WRITE8_MEMBER(input_w); + DECLARE_READ8_MEMBER(input_r); TIMER_DEVICE_CALLBACK_MEMBER(tp3_clock) { m_maincpu->set_input_line(0, ASSERT_LINE); } TIMER_DEVICE_CALLBACK_MEMBER(tp3_clear) { m_maincpu->set_input_line(0, CLEAR_LINE); } - - virtual void machine_start() override; }; +void tb303_state::machine_start() +{ + // zerofill + memset(m_ram, 0, sizeof(m_ram)); + memset(m_ram_addrset, 0, sizeof(m_ram_addrset)); + m_ram_address = 0; + m_ram_data = 0; + m_ram_ce = false; + m_ram_we = false; + m_led_data = 0; + m_inp_mux = 0; + + // register for savestates + save_item(NAME(m_ram)); + save_item(NAME(m_ram_addrset)); + save_item(NAME(m_ram_address)); + save_item(NAME(m_ram_data)); + save_item(NAME(m_ram_ce)); + save_item(NAME(m_ram_we)); + save_item(NAME(m_led_data)); + save_item(NAME(m_inp_mux)); +} + // TP2 to MCU CLK: LC circuit(TI S74230), stable sine wave, 2.2us interval #define TP2_HZ 454545 @@ -74,7 +109,7 @@ void tb303_state::refresh_ram() // _Q0: N/C, _Q1: IC-5, _Q2: IC-3, _Q3: IC-4 m_ram_ce = true; u8 hi = 0; - switch (m_port[NEC_UCOM4_PORTE] >> 2 & 3) + switch (m_ram_addrset[2] >> 2 & 3) { case 0: m_ram_ce = false; break; case 1: hi = 0; break; @@ -86,24 +121,31 @@ void tb303_state::refresh_ram() { // _WE must be high(read mode) for address transitions if (!m_ram_we) - m_ram_address = hi << 10 | (m_port[NEC_UCOM4_PORTE] << 8 & 0x300) | m_port[NEC_UCOM4_PORTF] << 4 | m_port[NEC_UCOM4_PORTD]; + m_ram_address = hi << 10 | (m_ram_addrset[2] << 8 & 0x300) | m_ram_addrset[1] << 4 | m_ram_addrset[0]; else - m_ram[m_ram_address] = m_port[NEC_UCOM4_PORTC]; + m_ram[m_ram_address] = m_ram_data; } } -WRITE8_MEMBER(tb303_state::ram_w) +template<int N> +WRITE8_MEMBER(tb303_state::ram_address_w) { - // MCU C: RAM data // MCU D,F,E: RAM address - m_port[offset] = data; + m_ram_addrset[N] = data; refresh_ram(); // MCU D,F01: pitch data //.. } -READ8_MEMBER(tb303_state::ram_r) +WRITE8_MEMBER(tb303_state::ram_data_w) +{ + // MCU C: RAM data + m_ram_data = data; + refresh_ram(); +} + +READ8_MEMBER(tb303_state::ram_data_r) { // MCU C: RAM data if (m_ram_ce && !m_ram_we) @@ -120,8 +162,6 @@ WRITE8_MEMBER(tb303_state::strobe_w) // MCU I1: pitch data latch strobe // MCU I2: gate signal - - m_port[offset] = data; } @@ -136,34 +176,47 @@ void tb303_state::update_leds() 0.2 D208 1.2 D215 2.2 D220 3.2 D210 0.3 D209 1.3 D216 2.3 D221 3.3 D212 */ - m_display->matrix(m_port[NEC_UCOM4_PORTH], m_port[NEC_UCOM4_PORTG]); + m_display->matrix(m_inp_mux, m_led_data); // todo: battery led // todo: 4 more leds(see top-left part) } -WRITE8_MEMBER(tb303_state::switch_w) +WRITE8_MEMBER(tb303_state::led_w) { // MCU G: leds state - // MCU H: input/led mux - if (offset == NEC_UCOM4_PORTH) - m_inp_mux = data = data ^ 0xf; + m_led_data = data; + update_leds(); +} - m_port[offset] = data; +WRITE8_MEMBER(tb303_state::input_w) +{ + // MCU H: input/led mux + m_inp_mux = data ^ 0xf; update_leds(); } READ8_MEMBER(tb303_state::input_r) { + u8 data = 0; + // MCU A,B: multiplexed inputs // if input mux(port H) is 0, port A status buffer & gate is selected (via Q5 NAND) - if (offset == NEC_UCOM4_PORTA && m_inp_mux == 0) + if (offset == 0 && m_inp_mux == 0) { // todo.. - return m_inputs[4]->read(); + data = m_inputs[4]->read(); } else - return read_inputs(4) >> (offset*4) & 0xf; + { + for (int i = 0; i < 4; i++) + if (BIT(m_inp_mux, i)) + data |= m_inputs[i]->read(); + + data >>= (offset*4) & 0xf; + } + + return data; } @@ -234,36 +287,19 @@ INPUT_PORTS_END ***************************************************************************/ -void tb303_state::machine_start() -{ - hh_ucom4_state::machine_start(); - - // zerofill - memset(m_ram, 0, sizeof(m_ram)); - m_ram_address = 0; - m_ram_ce = false; - m_ram_we = false; - - // register for savestates - save_item(NAME(m_ram)); - save_item(NAME(m_ram_address)); - save_item(NAME(m_ram_ce)); - save_item(NAME(m_ram_we)); -} - void tb303_state::tb303(machine_config &config) { /* basic machine hardware */ NEC_D650(config, m_maincpu, TP2_HZ); m_maincpu->read_a().set(FUNC(tb303_state::input_r)); m_maincpu->read_b().set(FUNC(tb303_state::input_r)); - m_maincpu->read_c().set(FUNC(tb303_state::ram_r)); - m_maincpu->write_c().set(FUNC(tb303_state::ram_w)); - m_maincpu->write_d().set(FUNC(tb303_state::ram_w)); - m_maincpu->write_e().set(FUNC(tb303_state::ram_w)); - m_maincpu->write_f().set(FUNC(tb303_state::ram_w)); - m_maincpu->write_g().set(FUNC(tb303_state::switch_w)); - m_maincpu->write_h().set(FUNC(tb303_state::switch_w)); + m_maincpu->read_c().set(FUNC(tb303_state::ram_data_r)); + m_maincpu->write_c().set(FUNC(tb303_state::ram_data_w)); + m_maincpu->write_d().set(FUNC(tb303_state::ram_address_w<0>)); + m_maincpu->write_e().set(FUNC(tb303_state::ram_address_w<2>)); + m_maincpu->write_f().set(FUNC(tb303_state::ram_address_w<1>)); + m_maincpu->write_g().set(FUNC(tb303_state::led_w)); + m_maincpu->write_h().set(FUNC(tb303_state::input_w)); m_maincpu->write_i().set(FUNC(tb303_state::strobe_w)); timer_device &tp3_clock(TIMER(config, "tp3_clock")); |