// license:BSD-3-Clause
// copyright-holders:David Haywood
/* 32X */
#ifndef MAME_MACHINE_MEGA32X_H
#define MAME_MACHINE_MEGA32X_H
#pragma once
#include "cpu/m68000/m68000.h"
#include "cpu/sh/sh2.h"
#include "cpu/sh/sh2comn.h"
#include "machine/timer.h"
#include "sound/dac.h"
#include "emupal.h"
#include "screen.h"
class sega_32x_device : public device_t, public device_palette_interface, public device_sound_interface, public device_video_interface
{
public:
void pause_cpu();
// set some variables at start, depending on region (shall be moved to a device interface?)
void set_framerate(int rate) { m_framerate = rate; }
void set_32x_pal(bool pal) { m_32x_pal = pal ? 1 : 0; }
void set_total_scanlines(int total) { m_base_total_scanlines = total; } // this get set at start only
double get_framerate() { return has_screen() ? screen().frame_period().as_hz() : double(m_framerate); }
void screen_eof(bool mode3)
{
m_32x_vblank_flag = 0;
m_32x_hcount_compare_val = -1;
update_total_scanlines(mode3);
}
uint16_t m68k_palette_r(offs_t offset);
void m68k_palette_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t m68k_dram_r(offs_t offset);
void m68k_dram_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t m68k_dram_overwrite_r(offs_t offset);
void m68k_dram_overwrite_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t m68k_a15106_r();
void m68k_a15106_w(address_space &space, offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t dreq_common_r(address_space &space, offs_t offset);
void dreq_common_w(address_space &space, offs_t offset, uint16_t data);
uint16_t m68k_a1511a_r();
void m68k_a1511a_w(uint16_t data);
uint16_t m68k_m_hint_vector_r(offs_t offset);
void m68k_m_hint_vector_w(offs_t offset, uint16_t data);
uint16_t m68k_MARS_r(offs_t offset);
uint16_t m68k_a15100_r();
void m68k_a15100_w(address_space &space, offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t m68k_a15102_r();
void m68k_a15102_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t m68k_a15104_r();
void m68k_a15104_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t m68k_m_commsram_r(offs_t offset);
void m68k_m_commsram_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t pwm_r(offs_t offset);
void pwm_w(offs_t offset, uint16_t data);
void m68k_pwm_w(offs_t offset, uint16_t data);
uint16_t common_vdp_regs_r(offs_t offset);
void common_vdp_regs_w(address_space &space, offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t master_4000_r();
void master_4000_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t slave_4000_r();
void slave_4000_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t common_4002_r();
void common_4002_w(uint16_t data);
uint16_t common_4004_r();
void common_4004_w(uint16_t data);
uint16_t common_4006_r();
void common_4006_w(uint16_t data);
void master_4014_w(uint16_t data);
void slave_4014_w(uint16_t data);
void master_4016_w(uint16_t data);
void slave_4016_w(uint16_t data);
void master_4018_w(uint16_t data);
void slave_4018_w(uint16_t data);
void master_401a_w(uint16_t data);
void slave_401a_w(uint16_t data);
void master_401c_w(uint16_t data);
void slave_401c_w(uint16_t data);
void master_401e_w(uint16_t data);
void slave_401e_w(uint16_t data);
SH2_DMA_FIFO_DATA_AVAILABLE_CB(_32x_fifo_available_callback);
void render_videobuffer_to_screenbuffer_helper(int scanline);
void render_videobuffer_to_screenbuffer(int x, uint32_t priority, uint32_t &lineptr);
int sh2_master_pwmint_enable, sh2_slave_pwmint_enable;
void check_framebuffer_swap(bool enabled);
void check_irqs();
void interrupt_cb(int scanline, int irq6);
void sh2_main_map(address_map &map);
void sh2_slave_map(address_map &map);
void sh2_common_map(address_map &map);
protected:
sega_32x_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
required_shared_ptr<uint32_t> m_sh2_shared;
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_add_mconfig(machine_config &config) override;
// device_palette_interface overrides
virtual uint32_t palette_entries() const override { return 32*32*32/**2*/; }
// device_sound_interface overrides
virtual void sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs) override;
void update_total_scanlines(bool mode3) { m_total_scanlines = mode3 ? (m_base_total_scanlines * 2) : m_base_total_scanlines; } // this gets set at each EOF
/* our main vblank handler resets this */
required_device<m68000_base_device> m_main_cpu;
required_device<sh2_device> m_master_cpu;
required_device<sh2_device> m_slave_cpu;
required_device<dac_word_interface> m_ldac;
required_device<dac_word_interface> m_rdac;
required_device<timer_device> m_scan_timer;
memory_bank_creator m_rombank;
int m_32x_hcount_compare_val;
int m_32x_vblank_flag;
int m_sh2_are_running;
int m_32x_240mode;
uint16_t m_32x_a1518a_reg;
sound_stream *m_stream;
TIMER_CALLBACK_MEMBER(handle_pwm_callback);
void calculate_pwm_timer();
uint16_t m_pwm_ctrl, m_pwm_cycle, m_pwm_tm_reg;
static constexpr int PWM_FIFO_SIZE = 3;
uint16_t m_cur_lch[PWM_FIFO_SIZE],m_cur_rch[PWM_FIFO_SIZE];
uint16_t m_pwm_cycle_reg; //used for latching
uint8_t m_pwm_timer_tick;
uint8_t m_lch_size, m_rch_size;
uint16_t m_lch_fifo_state, m_rch_fifo_state;
void lch_pop();
void rch_pop();
uint16_t get_hposition(void);
emu_timer *m_32x_pwm_timer;
private:
int m_32x_displaymode;
int m_32x_videopriority;
uint32_t m_32x_linerender[320+258]; // tmp buffer (bigger than it needs to be to simplify RLE decode)
int m_32x_adapter_enabled;
int m_32x_access_auth;
int m_32x_screenshift;
uint16_t m_32x_68k_a15104_reg;
int m_sh2_master_vint_enable, m_sh2_slave_vint_enable;
int m_sh2_master_hint_enable, m_sh2_slave_hint_enable;
int m_sh2_master_cmdint_enable, m_sh2_slave_cmdint_enable;
int m_sh2_hint_in_vbl;
int m_sh2_master_vint_pending;
int m_sh2_slave_vint_pending;
int m_32x_fb_swap;
int m_32x_hcount_reg;
uint16_t m_32x_autofill_length;
uint16_t m_32x_autofill_address;
uint16_t m_32x_autofill_data;
uint16_t m_a15106_reg;
uint16_t m_dreq_src_addr[2],m_dreq_dst_addr[2],m_dreq_size;
uint8_t m_sega_tv;
uint16_t m_hint_vector[2];
uint16_t m_a15100_reg;
int m_32x_68k_a15102_reg;
int m_32x_pal;
int m_framerate;
int m_base_total_scanlines;
int m_total_scanlines;
uint16_t m_commsram[8];
std::unique_ptr<uint16_t[]> m_32x_dram0;
std::unique_ptr<uint16_t[]> m_32x_dram1;
uint16_t *m_32x_display_dram, *m_32x_access_dram;
std::unique_ptr<uint16_t[]> m_32x_palette;
uint16_t m_fifo_block_a[4];
uint16_t m_fifo_block_b[4];
uint16_t* m_current_fifo_block;
uint16_t* m_current_fifo_readblock;
int m_current_fifo_write_pos;
int m_current_fifo_read_pos;
int m_fifo_block_a_full;
int m_fifo_block_b_full;
};
class sega_32x_ntsc_device : public sega_32x_device
{
public:
template <typename T, typename U>
sega_32x_ntsc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, T &&main_cpu_tag, U &&timer_tag)
: sega_32x_ntsc_device(mconfig, tag, owner, clock)
{
m_main_cpu.set_tag(std::forward<T>(main_cpu_tag));
m_scan_timer.set_tag(std::forward<U>(timer_tag));
}
sega_32x_ntsc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
virtual void device_add_mconfig(machine_config &config) override;
};
class sega_32x_pal_device : public sega_32x_device
{
public:
template <typename T, typename U>
sega_32x_pal_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, T &&main_cpu_tag, U &&timer_tag)
: sega_32x_pal_device(mconfig, tag, owner, clock)
{
m_main_cpu.set_tag(std::forward<T>(main_cpu_tag));
m_scan_timer.set_tag(std::forward<U>(timer_tag));
}
sega_32x_pal_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
virtual void device_add_mconfig(machine_config &config) override;
};
DECLARE_DEVICE_TYPE(SEGA_32X_NTSC, sega_32x_ntsc_device)
DECLARE_DEVICE_TYPE(SEGA_32X_PAL, sega_32x_pal_device)
#endif // MAME_MACHINE_MEGA32X_H