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Diffstat (limited to 'src/devices/bus/nes/mmc1.h')
-rw-r--r-- | src/devices/bus/nes/mmc1.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/devices/bus/nes/mmc1.h b/src/devices/bus/nes/mmc1.h new file mode 100644 index 00000000000..05e25c46818 --- /dev/null +++ b/src/devices/bus/nes/mmc1.h @@ -0,0 +1,82 @@ +// license:BSD-3-Clause +// copyright-holders:Fabio Priuli +#ifndef __NES_MMC1_H +#define __NES_MMC1_H + +#include "nxrom.h" + + +// ======================> nes_sxrom_device + +class nes_sxrom_device : public nes_nrom_device +{ +public: + // construction/destruction + nes_sxrom_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source); + nes_sxrom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + // device-level overrides + virtual void device_start(); + virtual DECLARE_READ8_MEMBER(read_m); + virtual DECLARE_WRITE8_MEMBER(write_m); + virtual DECLARE_WRITE8_MEMBER(write_h); + virtual void update_regs(int reg); // this is needed to simplify NES-EVENT pcb implementation, which handle differently some regs! + + virtual void pcb_reset(); + +protected: + TIMER_CALLBACK_MEMBER(resync_callback); + virtual void set_prg(); + virtual void set_chr(); + + UINT8 m_reg[4]; + int m_reg_write_enable; + int m_latch; + int m_count; +}; + +class nes_sorom_device : public nes_sxrom_device +{ +public: + // construction/destruction + nes_sorom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + virtual DECLARE_READ8_MEMBER(read_m); + virtual DECLARE_WRITE8_MEMBER(write_m); + + virtual void pcb_reset(); +}; + +class nes_sxrom_a_device : public nes_sxrom_device +{ +public: + // construction/destruction + nes_sxrom_a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + virtual DECLARE_READ8_MEMBER(read_m); + virtual DECLARE_WRITE8_MEMBER(write_m); +}; + +class nes_sorom_a_device : public nes_sxrom_device +{ +public: + // construction/destruction + nes_sorom_a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + virtual DECLARE_READ8_MEMBER(read_m); + virtual DECLARE_WRITE8_MEMBER(write_m); + + virtual void pcb_reset(); +}; + + + + +// device type definition +extern const device_type NES_SXROM; +extern const device_type NES_SOROM; +extern const device_type NES_SXROM_A; +extern const device_type NES_SOROM_A; + + +#endif |