// license:BSD-3-Clause
// copyright-holders:David Haywood
/* Sega CD / Mega CD */
#include "cpu/m68000/m68000.h"
#include "machine/lc89510.h"
#include "machine/megacdcd.h"
#include "sound/rf5c68.h"
#define SEGACD_CLOCK 12500000
#define RAM_MODE_2MEG (0)
#define RAM_MODE_1MEG (2)
#define DMA_PCM (0x0400)
#define DMA_PRG (0x0500)
#define DMA_WRAM (0x0700)
// irq3 timer
#define CHECK_SCD_LV3_INTERRUPT \
if (m_lc89510_temp->get_segacd_irq_mask() & 0x08) \
{ \
m_scdcpu->set_input_line(3, HOLD_LINE); \
}
// from master
#define CHECK_SCD_LV2_INTERRUPT \
if (m_lc89510_temp->get_segacd_irq_mask() & 0x04) \
{ \
m_scdcpu->set_input_line(2, HOLD_LINE); \
}
// gfx convert
#define CHECK_SCD_LV1_INTERRUPT \
if (m_lc89510_temp->get_segacd_irq_mask() & 0x02) \
{ \
m_scdcpu->set_input_line(1, HOLD_LINE); \
}
#define SEGACD_IRQ3_TIMER_SPEED (attotime::from_nsec(m_irq3_timer_reg*30720))
class sega_segacd_device : public device_t, public device_gfx_interface
{
public:
sega_segacd_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);
required_device<cpu_device> m_scdcpu;
required_device<rf5c68_device> m_rfsnd;
required_device<lc89510_temp_device> m_lc89510_temp;
required_device<timer_device> m_stopwatch_timer;
required_device<timer_device> m_stamp_timer;
required_device<timer_device> m_irq3_timer;
required_device<timer_device> m_dma_timer;
//required_device<timer_device> m_hock_timer;
required_shared_ptr<UINT16> m_prgram;
required_shared_ptr<UINT16> m_dataram;
required_shared_ptr<UINT16> m_font_bits;
// can't use a memshare because it's 8-bit RAM in a 16-bit address space
std::vector<UINT8> m_backupram;
UINT8 m_font_color;
UINT16 scd_rammode;
UINT32 scd_mode_dmna_ret_flags ;
tilemap_t *segacd_stampmap[4];
UINT8 segacd_ram_writeprotect_bits;
int segacd_4meg_prgbank;// = 0; // which bank the MainCPU can see of the SubCPU PrgRAM
int segacd_memory_priority_mode;// = 0;
int segacd_stampsize;
UINT16 segacd_hint_register;
UINT16 segacd_imagebuffer_vdot_size;
UINT16 segacd_imagebuffer_vcell_size;
UINT16 segacd_imagebuffer_hdot_size;
int segacd_conversion_active;// = 0;
UINT16 segacd_stampmap_base_address;
UINT16 segacd_imagebuffer_start_address;
UINT16 segacd_imagebuffer_offset;
UINT16 segacd_comms_flags;// = 0x0000;
UINT16 segacd_comms_part1[0x8];
UINT16 segacd_comms_part2[0x8];
int segacd_redled;// = 0;
int segacd_greenled;// = 0;
int segacd_ready;// = 1; // actually set 100ms after startup?
UINT8 m_irq3_timer_reg;
TIMER_DEVICE_CALLBACK_MEMBER( irq3_timer_callback );
TIMER_DEVICE_CALLBACK_MEMBER( stamp_timer_callback );
UINT16 handle_segacd_sub_int_callback(int irqline);
inline void write_pixel(UINT8 pix, int pixeloffset);
UINT16 segacd_1meg_mode_word_read(int offset, UINT16 mem_mask);
void segacd_1meg_mode_word_write(int offset, UINT16 data, UINT16 mem_mask, int use_pm);
DECLARE_READ16_MEMBER( segacd_dmaaddr_r );
DECLARE_WRITE16_MEMBER( segacd_dmaaddr_w );
UINT16 m_dmaaddr;
UINT16 m_a12000_halt_reset_reg;
int m_framerate;
int m_base_total_scanlines;
int m_total_scanlines;
void segacd_mark_tiles_dirty(int offset);
int segacd_get_active_stampmap_tilemap(void);
// 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_total_scanlines(int total) { m_base_total_scanlines = total; } // this gets set at start only
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
void SCD_GET_TILE_INFO_16x16_1x1( int& tile_region, int& tileno, int tile_index );
void SCD_GET_TILE_INFO_32x32_1x1( int& tile_region, int& tileno, int tile_index );
void SCD_GET_TILE_INFO_16x16_16x16( int& tile_region, int& tileno, int tile_index );
void SCD_GET_TILE_INFO_32x32_16x16( int& tile_region, int& tileno, int tile_index );
TILE_GET_INFO_MEMBER( get_stampmap_16x16_1x1_tile_info );
TILE_GET_INFO_MEMBER( get_stampmap_32x32_1x1_tile_info );
TILE_GET_INFO_MEMBER( get_stampmap_16x16_16x16_tile_info );
TILE_GET_INFO_MEMBER( get_stampmap_32x32_16x16_tile_info );
UINT8 get_stampmap_16x16_1x1_tile_info_pixel(int xpos, int ypos);
UINT8 get_stampmap_32x32_1x1_tile_info_pixel(int xpos, int ypos);
UINT8 get_stampmap_16x16_16x16_tile_info_pixel(int xpos, int ypos);
UINT8 get_stampmap_32x32_16x16_tile_info_pixel(int xpos, int ypos);
WRITE16_MEMBER( scd_a12000_halt_reset_w );
READ16_MEMBER( scd_a12000_halt_reset_r );
READ16_MEMBER( scd_a12002_memory_mode_r );
WRITE8_MEMBER( scd_a12002_memory_mode_w_8_15 );
WRITE8_MEMBER( scd_a12002_memory_mode_w_0_7 );
WRITE16_MEMBER( scd_a12002_memory_mode_w );
READ16_MEMBER( segacd_sub_memory_mode_r );
WRITE8_MEMBER( segacd_sub_memory_mode_w_8_15 );
WRITE8_MEMBER( segacd_sub_memory_mode_w_0_7 );
WRITE16_MEMBER( segacd_sub_memory_mode_w );
READ16_MEMBER( segacd_comms_flags_r );
WRITE16_MEMBER( segacd_comms_flags_subcpu_w );
WRITE16_MEMBER( segacd_comms_flags_maincpu_w );
READ16_MEMBER( scd_4m_prgbank_ram_r );
WRITE16_MEMBER( scd_4m_prgbank_ram_w );
READ16_MEMBER( segacd_comms_main_part1_r );
WRITE16_MEMBER( segacd_comms_main_part1_w );
READ16_MEMBER( segacd_comms_main_part2_r );
WRITE16_MEMBER( segacd_comms_main_part2_w );
READ16_MEMBER( segacd_comms_sub_part1_r );
WRITE16_MEMBER( segacd_comms_sub_part1_w );
READ16_MEMBER( segacd_comms_sub_part2_r );
WRITE16_MEMBER( segacd_comms_sub_part2_w );
READ16_MEMBER( segacd_main_dataram_part1_r );
WRITE16_MEMBER( segacd_main_dataram_part1_w );
READ16_MEMBER( scd_hint_vector_r );
READ16_MEMBER( scd_a12006_hint_register_r );
WRITE16_MEMBER( scd_a12006_hint_register_w );
WRITE16_MEMBER( segacd_stopwatch_timer_w );
READ16_MEMBER( segacd_stopwatch_timer_r );
READ16_MEMBER( segacd_sub_led_ready_r );
WRITE16_MEMBER( segacd_sub_led_ready_w );
READ16_MEMBER( segacd_sub_dataram_part1_r );
WRITE16_MEMBER( segacd_sub_dataram_part1_w );
READ16_MEMBER( segacd_sub_dataram_part2_r );
WRITE16_MEMBER( segacd_sub_dataram_part2_w );
READ16_MEMBER( segacd_stampsize_r );
WRITE16_MEMBER( segacd_stampsize_w );
UINT8 read_pixel_from_stampmap(bitmap_ind16* srcbitmap, int x, int y);
WRITE16_MEMBER( segacd_trace_vector_base_address_w );
READ16_MEMBER( segacd_imagebuffer_vdot_size_r );
WRITE16_MEMBER( segacd_imagebuffer_vdot_size_w );
READ16_MEMBER( segacd_stampmap_base_address_r );
WRITE16_MEMBER( segacd_stampmap_base_address_w );
READ16_MEMBER( segacd_imagebuffer_start_address_r );
WRITE16_MEMBER( segacd_imagebuffer_start_address_w );
READ16_MEMBER( segacd_imagebuffer_offset_r );
WRITE16_MEMBER( segacd_imagebuffer_offset_w );
READ16_MEMBER( segacd_imagebuffer_vcell_size_r );
WRITE16_MEMBER( segacd_imagebuffer_vcell_size_w );
READ16_MEMBER( segacd_imagebuffer_hdot_size_r );
WRITE16_MEMBER( segacd_imagebuffer_hdot_size_w );
READ16_MEMBER( segacd_irq3timer_r );
WRITE16_MEMBER( segacd_irq3timer_w );
READ8_MEMBER( backupram_r );
WRITE8_MEMBER( backupram_w );
READ8_MEMBER( font_color_r );
WRITE8_MEMBER( font_color_w );
READ16_MEMBER( font_converted_r );
TIMER_DEVICE_CALLBACK_MEMBER( dma_timer_callback );
IRQ_CALLBACK_MEMBER(segacd_sub_int_callback);
void SegaCD_CDC_Do_DMA( int &dmacount, UINT8 *CDC_BUFFER, UINT16 &dma_addrc, UINT16 &destination );
protected:
virtual void device_start();
virtual void device_reset();
// optional information overrides
// virtual const rom_entry *device_rom_region() const;
virtual machine_config_constructor device_mconfig_additions() const;
private:
// virtual void device_config_complete();
};
class sega_segacd_us_device : public sega_segacd_device
{
public:
sega_segacd_us_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
protected:
};
class sega_segacd_japan_device : public sega_segacd_device
{
public:
sega_segacd_japan_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
protected:
// virtual machine_config_constructor device_mconfig_additions() const;
};
class sega_segacd_europe_device : public sega_segacd_device
{
public:
sega_segacd_europe_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
protected:
// virtual machine_config_constructor device_mconfig_additions() const;
};
extern const device_type SEGA_SEGACD_US;
extern const device_type SEGA_SEGACD_JAPAN;
extern const device_type SEGA_SEGACD_EUROPE;