// license:BSD-3-Clause // copyright-holders:Aaron Giles /************************************************************************* ldv1000.h Pioneer LD-V1000 laserdisc emulation. *************************************************************************/ #ifndef MAME_MACHINE_LDV1000_H #define MAME_MACHINE_LDV1000_H #pragma once #include "laserdsc.h" #include "cpu/z80/z80.h" #include "cpu/mcs48/mcs48.h" #include "machine/z80ctc.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** // device type definition DECLARE_DEVICE_TYPE(PIONEER_LDV1000, pioneer_ldv1000_device) //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> pioneer_ldv1000_device // base ldv1000 class class pioneer_ldv1000_device : public parallel_laserdisc_device { public: // construction/destruction pioneer_ldv1000_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); auto command_strobe_callback() { return m_command_strobe_cb.bind(); } // input and output virtual void data_w(uint8_t data) override; virtual void enter_w(int state) override { } virtual uint8_t data_r() override { return m_status; } virtual int status_strobe_r() override { return BIT(m_portc1, 5); } virtual int ready_r() override { return BIT(m_portc1, 4); } protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; virtual const tiny_rom_entry *device_rom_region() const override; virtual void device_add_mconfig(machine_config &config) override; // subclass overrides virtual void player_vsync(const vbi_metadata &vbi, int fieldnum, const attotime &curtime) override; virtual int32_t player_update(const vbi_metadata &vbi, int fieldnum, const attotime &curtime) override; virtual void player_overlay(bitmap_yuy16 &bitmap) override { } TIMER_CALLBACK_MEMBER(vsync_off); TIMER_CALLBACK_MEMBER(multijump_tick); TIMER_CALLBACK_MEMBER(process_vbi_data); private: // internal helpers bool focus_on() const { return !(m_portb1 & 0x01); } bool spdl_on() const { return !(m_portb1 & 0x02); } bool laser_on() const { return (m_portb1 & 0x40); } // internal read/write handlers void z80_decoder_display_port_w(offs_t offset, uint8_t data); uint8_t z80_decoder_display_port_r(offs_t offset); uint8_t z80_controller_r(); void z80_controller_w(uint8_t data); // internal read/write handlers void ctc_interrupt(int state); void ppi0_porta_w(uint8_t data); uint8_t ppi0_portb_r(); uint8_t ppi0_portc_r(); void ppi0_portc_w(uint8_t data); uint8_t ppi1_porta_r(); void ppi1_portb_w(uint8_t data); void ppi1_portc_w(uint8_t data); void ldv1000_map(address_map &map); void ldv1000_portmap(address_map &map); // internal state required_device m_z80_cpu; /* CPU index of the Z80 */ required_device m_z80_ctc; /* CTC device */ emu_timer * m_multitimer; /* multi-jump timer device */ emu_timer * m_vsync_off_timer; /* vsync-shutoff timer device */ emu_timer * m_process_vbi_timer; /* VBI processing timer device */ devcb_write_line m_command_strobe_cb; /* communication status */ uint8_t m_command; /* command byte to the player */ uint8_t m_status; /* status byte from the player */ bool m_vsync; /* VSYNC state */ /* I/O port states */ uint8_t m_counter_start; /* starting value for counter */ uint8_t m_counter; /* current counter value */ uint8_t m_portc0; /* port C on PPI 0 */ uint8_t m_portb1; /* port B on PPI 1 */ uint8_t m_portc1; /* port C on PPI 1 */ /* display/decode circuit emulation */ uint8_t m_portselect; /* selection of which port to access */ uint8_t m_display[2][20]; /* display lines */ uint8_t m_dispindex; /* index within the display line */ uint8_t m_vbi[7*3]; /* VBI data */ bool m_vbiready; /* VBI ready flag */ uint8_t m_vbiindex; /* index within the VBI data */ }; #endif // MAME_MACHINE_LDV1000_H