// license:BSD-3-Clause // copyright-holders:Wilbert Pol /***************************************************************************** * * includes/electron.h * * Acorn Electron * * Driver by Wilbert Pol * ****************************************************************************/ #ifndef MAME_INCLUDES_ELECTRON_H #define MAME_INCLUDES_ELECTRON_H #include "machine/ram.h" #include "imagedev/cassette.h" #include "sound/beep.h" #include "emupal.h" #include "bus/electron/exp.h" /* Interrupts */ #define INT_HIGH_TONE 0x40 #define INT_TRANSMIT_EMPTY 0x20 #define INT_RECEIVE_FULL 0x10 #define INT_RTC 0x08 #define INT_DISPLAY_END 0x04 #define INT_SET 0x100 #define INT_CLEAR 0x200 class electron_state : public driver_device { public: electron_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_screen(*this, "screen") , m_cassette(*this, "cassette") , m_beeper(*this, "beeper") , m_region_basic(*this, "basic") , m_region_mos(*this, "mos") , m_keybd(*this, "LINE.%u", 0) , m_exp(*this, "exp") , m_ram(*this, RAM_TAG) , m_mrb(*this, "MRB") { } void electron(machine_config &config); void btm2105(machine_config &config); void electron64(machine_config &config); DECLARE_INPUT_CHANGED_MEMBER( trigger_reset ); private: enum { TIMER_TAPE_HANDLER, TIMER_SETUP_BEEP, TIMER_SCANLINE_INTERRUPT }; emu_timer *m_tape_timer; int m_map4[256]; int m_map16[256]; emu_timer *m_scanline_timer; DECLARE_READ8_MEMBER(electron64_fetch_r); DECLARE_READ8_MEMBER(electron_mem_r); DECLARE_WRITE8_MEMBER(electron_mem_w); DECLARE_READ8_MEMBER(electron_paged_r); DECLARE_WRITE8_MEMBER(electron_paged_w); DECLARE_READ8_MEMBER(electron_mos_r); DECLARE_WRITE8_MEMBER(electron_mos_w); DECLARE_READ8_MEMBER(electron_fred_r); DECLARE_WRITE8_MEMBER(electron_fred_w); DECLARE_READ8_MEMBER(electron_jim_r); DECLARE_WRITE8_MEMBER(electron_jim_w); DECLARE_READ8_MEMBER(electron_sheila_r); DECLARE_WRITE8_MEMBER(electron_sheila_w); DECLARE_PALETTE_INIT(electron); uint32_t screen_update_electron(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); TIMER_CALLBACK_MEMBER(electron_tape_timer_handler); TIMER_CALLBACK_MEMBER(setup_beep); TIMER_CALLBACK_MEMBER(electron_scanline_interrupt); inline uint8_t read_vram( uint16_t addr ); inline void electron_plot_pixel(bitmap_ind16 &bitmap, int x, int y, uint32_t color); void electron_interrupt_handler(int mode, int interrupt); void electron_mem(address_map &map); void electron64_opcodes(address_map &map); virtual void machine_start() override; virtual void machine_reset() override; virtual void video_start() override; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; required_device m_maincpu; required_device m_screen; required_device m_cassette; required_device m_beeper; required_memory_region m_region_basic; required_memory_region m_region_mos; required_ioport_array<14> m_keybd; required_device m_exp; required_device m_ram; optional_ioport m_mrb; void waitforramsync(); void electron_tape_start(); void electron_tape_stop(); /* ULA context */ struct ULA { uint8_t interrupt_status; uint8_t interrupt_control; uint8_t rompage; uint16_t screen_start; uint16_t screen_base; uint16_t screen_size; uint16_t screen_addr; int screen_dispend; int current_pal[16]; int communication_mode; int screen_mode; int cassette_motor_mode; int capslock_mode; /* tape reading related */ uint32_t tape_value; int tape_steps; int bit_count; int high_tone_set; int start_bit; int stop_bit; int tape_running; uint8_t tape_byte; }; ULA m_ula; bool m_mrb_mapped; bool m_vdu_drivers; }; #endif // MAME_INCLUDES_ELECTRON_H