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-rw-r--r--src/devices/bus/nes/namcot.h163
1 files changed, 163 insertions, 0 deletions
diff --git a/src/devices/bus/nes/namcot.h b/src/devices/bus/nes/namcot.h
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+++ b/src/devices/bus/nes/namcot.h
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+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+#ifndef __NES_NAMCOT_H
+#define __NES_NAMCOT_H
+
+#include "nxrom.h"
+
+
+// ======================> nes_namcot3433_device
+
+class nes_namcot3433_device : public nes_nrom_device
+{
+public:
+ // construction/destruction
+ nes_namcot3433_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_namcot3433_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual DECLARE_WRITE8_MEMBER(dxrom_write);
+ virtual DECLARE_WRITE8_MEMBER(write_h) { dxrom_write(space, offset, data, mem_mask); }
+
+ virtual void pcb_reset();
+
+private:
+ UINT8 m_latch;
+};
+
+
+// ======================> nes_namcot3446_device
+
+class nes_namcot3446_device : public nes_nrom_device
+{
+public:
+ // construction/destruction
+ nes_namcot3446_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual DECLARE_WRITE8_MEMBER(write_h);
+
+ virtual void pcb_reset();
+
+private:
+ UINT8 m_latch;
+};
+
+
+// ======================> nes_namcot3425_device
+
+class nes_namcot3425_device : public nes_nrom_device
+{
+public:
+ // construction/destruction
+ nes_namcot3425_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual DECLARE_WRITE8_MEMBER(write_h);
+
+ virtual void pcb_reset();
+
+private:
+ UINT8 m_latch;
+ UINT8 m_reg[4];
+};
+
+
+// ======================> nes_namcot340_device
+
+class nes_namcot340_device : public nes_nrom_device
+{
+public:
+ // construction/destruction
+ nes_namcot340_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_namcot340_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+ virtual DECLARE_READ8_MEMBER(n340_loread);
+ virtual DECLARE_WRITE8_MEMBER(n340_lowrite);
+ virtual DECLARE_WRITE8_MEMBER(n340_hiwrite);
+ virtual DECLARE_READ8_MEMBER(read_l) { return n340_loread(space, offset, mem_mask); }
+ virtual DECLARE_WRITE8_MEMBER(write_l) { n340_lowrite(space, offset, data, mem_mask); }
+ virtual DECLARE_WRITE8_MEMBER(write_h) { n340_hiwrite(space, offset, data, mem_mask); }
+
+ virtual void pcb_reset();
+
+protected:
+ UINT16 m_irq_count;
+ int m_irq_enable;
+
+ static const device_timer_id TIMER_IRQ = 0;
+ emu_timer *irq_timer;
+
+ // Namcot-163 chip contains 8K of internal ram, possibly battery backed up (not emulated yet)
+ // was it also present in 175 & 340 chips?
+ UINT8 m_n163_ram[0x2000];
+};
+
+
+// ======================> nes_namcot175_device
+
+class nes_namcot175_device : public nes_namcot340_device
+{
+public:
+ // construction/destruction
+ nes_namcot175_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 pcb_reset();
+
+private:
+ UINT8 m_wram_protect;
+};
+
+
+// ======================> nes_namcot163_device
+
+class nes_namcot163_device : public nes_namcot340_device
+{
+public:
+ // construction/destruction
+ nes_namcot163_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_l);
+ virtual DECLARE_READ8_MEMBER(read_m);
+ virtual DECLARE_WRITE8_MEMBER(write_l);
+ virtual DECLARE_WRITE8_MEMBER(write_m);
+ virtual DECLARE_WRITE8_MEMBER(write_h);
+
+ // we have to overwrite these to allow CIRAM to be used for VRAM, even if it's not clear which game(s) use this
+ virtual DECLARE_READ8_MEMBER(chr_r);
+ virtual DECLARE_WRITE8_MEMBER(chr_w);
+
+ virtual void pcb_reset();
+
+private:
+ void set_mirror(UINT8 page, UINT8 data);
+
+ UINT8 m_wram_protect, m_latch, m_chr_bank;
+ // TODO: add emulation of the sound part of the chip
+};
+
+
+
+// device type definition
+extern const device_type NES_NAMCOT3433;
+extern const device_type NES_NAMCOT3446;
+extern const device_type NES_NAMCOT3425;
+extern const device_type NES_NAMCOT175;
+extern const device_type NES_NAMCOT340;
+extern const device_type NES_NAMCOT163;
+
+#endif