// license:BSD-3-Clause // copyright-holders:Fabio Priuli #ifndef MAME_BUS_NES_JY_H #define MAME_BUS_NES_JY_H #pragma once #include "nxrom.h" // ======================> nes_jy_typea_device class nes_jy_typea_device : public nes_nrom_device { public: // construction/destruction nes_jy_typea_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); virtual uint8_t read_l(offs_t offset) override; virtual uint8_t read_m(offs_t offset) override; virtual void write_l(offs_t offset, uint8_t data) override; virtual void write_h(offs_t offset, uint8_t data) override; virtual uint8_t chr_r(offs_t offset) override; virtual uint8_t nt_r(offs_t offset) override; virtual void scanline_irq(int scanline, int vblank, int blanked) override; virtual void pcb_reset() override; protected: nes_jy_typea_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); // device-level overrides virtual void device_start() override; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; void irq_clock(int blanked, int mode); void update_banks(int reg); void update_prg(); void update_chr(); void update_mirror_typea(); virtual void update_mirror() { update_mirror_typea(); } inline uint8_t unscramble(uint8_t bank); uint8_t m_mul[2]; uint8_t m_latch; uint8_t m_reg[4]; uint8_t m_chr_latch[2]; // type C uses a more complex CHR 4K mode, and these vars are only changed for those games uint8_t m_mmc_prg_bank[4]; uint16_t m_mmc_nt_bank[4]; uint16_t m_mmc_vrom_bank[8]; uint16_t m_extra_chr_bank; uint16_t m_extra_chr_mask; int m_bank_6000; uint8_t m_irq_mode; uint8_t m_irq_count; uint8_t m_irq_prescale; uint8_t m_irq_prescale_mask; uint8_t m_irq_flip; int m_irq_enable; int m_irq_up, m_irq_down; static const device_timer_id TIMER_IRQ = 0; emu_timer *irq_timer; attotime timer_freq; }; // ======================> nes_jy_typeb_device class nes_jy_typeb_device : public nes_jy_typea_device { public: // construction/destruction nes_jy_typeb_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); protected: nes_jy_typeb_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); void update_mirror_typeb(); virtual void update_mirror() override { update_mirror_typeb(); } }; // ======================> nes_jy_typec_device class nes_jy_typec_device : public nes_jy_typeb_device { public: // construction/destruction nes_jy_typec_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); virtual uint8_t chr_r(offs_t offset) override; protected: void update_mirror_typec(); virtual void update_mirror() override { update_mirror_typec(); } }; // device type definition DECLARE_DEVICE_TYPE(NES_JY_TYPEA, nes_jy_typea_device) DECLARE_DEVICE_TYPE(NES_JY_TYPEB, nes_jy_typeb_device) DECLARE_DEVICE_TYPE(NES_JY_TYPEC, nes_jy_typec_device) #endif // MAME_BUS_NES_JY_H