/***************************************************************************** * * includes/electron.h * * Acorn Electron * * Driver by Wilbert Pol * ****************************************************************************/ #ifndef ELECTRON_H_ #define ELECTRON_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 /* ULA context */ typedef struct { UINT8 interrupt_status; UINT8 interrupt_control; UINT8 rompage; UINT16 screen_start; UINT16 screen_base; int screen_size; UINT16 screen_addr; UINT8 *vram; int current_pal[16]; int communication_mode; int screen_mode; int cassette_motor_mode; int capslock_mode; // int scanline; /* tape reading related */ UINT32 tape_value; int tape_steps; int bit_count; int high_tone_set; int start_bit; int stop_bit; int tape_running; UINT8 tape_byte; } ULA; class electron_state : public driver_device { public: electron_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) { } ULA m_ula; emu_timer *m_tape_timer; int m_map4[256]; int m_map16[256]; emu_timer *m_scanline_timer; DECLARE_READ8_MEMBER(electron_read_keyboard); DECLARE_READ8_MEMBER(electron_jim_r); DECLARE_WRITE8_MEMBER(electron_jim_w); DECLARE_READ8_MEMBER(electron_1mhz_r); DECLARE_WRITE8_MEMBER(electron_1mhz_w); DECLARE_READ8_MEMBER(electron_ula_r); DECLARE_WRITE8_MEMBER(electron_ula_w); void electron_tape_start(); void electron_tape_stop(); }; /*----------- defined in machine/electron.c -----------*/ MACHINE_START( electron ); void electron_interrupt_handler(running_machine &machine, int mode, int interrupt); /*----------- defined in video/electron.c -----------*/ VIDEO_START( electron ); SCREEN_UPDATE_IND16( electron ); #endif /* ELECTRON_H_ */