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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
/******************************************************************************
CD-i MCD212 video emulation
-------------------
written by Ryan Holtz
*******************************************************************************
STATUS:
- Just enough for the Mono-I CD-i board to work somewhat properly.
TODO:
- Unknown yet.
*******************************************************************************/
#ifndef MAME_VIDEO_MCD212_H
#define MAME_VIDEO_MCD212_H
#pragma once
#define MCD212_CURCNT_COLOR 0x00000f // Cursor color
#define MCD212_CURCNT_CUW 0x008000 // Cursor width
#define MCD212_CURCNT_COF 0x070000 // Cursor off time
#define MCD212_CURCNT_COF_SHIFT 16
#define MCD212_CURCNT_CON 0x280000 // Cursor on time
#define MCD212_CURCNT_CON_SHIFT 19
#define MCD212_CURCNT_BLKC 0x400000 // Blink type
#define MCD212_CURCNT_EN 0x800000 // Cursor enable
#define MCD212_ICM_CS 0x400000 // CLUT select
#define MCD212_ICM_NR 0x080000 // Number of region flags
#define MCD212_ICM_EV 0x040000 // External video
#define MCD212_ICM_MODE2 0x000f00 // Plane 2
#define MCD212_ICM_MODE2_SHIFT 8
#define MCD212_ICM_MODE1 0x00000f // Plane 1
#define MCD212_ICM_MODE1_SHIFT 0
#define MCD212_TCR_DISABLE_MX 0x800000 // Mix disable
#define MCD212_TCR_TB 0x000f00 // Plane B
#define MCD212_TCR_TB_SHIFT 8
#define MCD212_TCR_TA 0x00000f // Plane A
#define MCD212_TCR_COND_1 0x0 // Transparent if: Always (Plane Disabled)
#define MCD212_TCR_COND_KEY_1 0x1 // Transparent if: Color Key = True
#define MCD212_TCR_COND_XLU_1 0x2 // Transparent if: Transparency Bit = 1
#define MCD212_TCR_COND_RF0_1 0x3 // Transparent if: Region Flag 0 = True
#define MCD212_TCR_COND_RF1_1 0x4 // Transparent if: Region Flag 1 = True
#define MCD212_TCR_COND_RF0KEY_1 0x5 // Transparent if: Region Flag 0 = True || Color Key = True
#define MCD212_TCR_COND_RF1KEY_1 0x6 // Transparent if: Region Flag 1 = True || Color Key = True
#define MCD212_TCR_COND_UNUSED0 0x7 // Unused
#define MCD212_TCR_COND_0 0x8 // Transparent if: Never (No Transparent Area)
#define MCD212_TCR_COND_KEY_0 0x9 // Transparent if: Color Key = False
#define MCD212_TCR_COND_XLU_0 0xa // Transparent if: Transparency Bit = 0
#define MCD212_TCR_COND_RF0_0 0xb // Transparent if: Region Flag 0 = False
#define MCD212_TCR_COND_RF1_0 0xc // Transparent if: Region Flag 1 = False
#define MCD212_TCR_COND_RF0KEY_0 0xd // Transparent if: Region Flag 0 = False && Color Key = False
#define MCD212_TCR_COND_RF1KEY_0 0xe // Transparent if: Region Flag 1 = False && Color Key = False
#define MCD212_TCR_COND_UNUSED1 0xf // Unused
#define MCD212_POR_AB 0 // Plane A in front of Plane B
#define MCD212_POR_BA 1 // Plane B in front of Plane A
#define MCD212_RC_X 0x0003ff // X position
#define MCD212_RC_WF 0x00fc00 // Weight position
#define MCD212_RC_WF_SHIFT 10
#define MCD212_RC_RF 0x010000 // Region flag
#define MCD212_RC_RF_SHIFT 16
#define MCD212_RC_OP 0xf00000 // Operation
#define MCD212_RC_OP_SHIFT 20
#define MCD212_CSR1W_ST 0x0002 // Standard
#define MCD212_CSR1W_BE 0x0001 // Bus Error
#define MCD212_CSR2R_IT1 0x0004 // Interrupt 1
#define MCD212_CSR2R_IT2 0x0002 // Interrupt 2
#define MCD212_CSR2R_BE 0x0001 // Bus Error
#define MCD212_DCR_DE 0x8000 // Display Enable
#define MCD212_DCR_CF 0x4000 // Crystal Frequency
#define MCD212_DCR_FD 0x2000 // Frame Duration
#define MCD212_DCR_SM 0x1000 // Scan Mode
#define MCD212_DCR_CM 0x0800 // Color Mode Ch.1/2
#define MCD212_DCR_ICA 0x0200 // ICA Enable Ch.1/2
#define MCD212_DCR_DCA 0x0100 // DCA Enable Ch.1/2
#define MCD212_DDR_FT 0x0300 // Display File Type
#define MCD212_DDR_FT_BMP 0x0000 // Bitmap
#define MCD212_DDR_FT_BMP2 0x0100 // Bitmap (alt.)
#define MCD212_DDR_FT_RLE 0x0200 // Run-Length Encoded
#define MCD212_DDR_FT_MOSAIC 0x0300 // Mosaic
#define MCD212_DDR_MT 0x0c00 // Mosaic File Type
#define MCD212_DDR_MT_2 0x0000 // 2x1
#define MCD212_DDR_MT_4 0x0400 // 4x1
#define MCD212_DDR_MT_8 0x0800 // 8x1
#define MCD212_DDR_MT_16 0x0c00 // 16x1
#define MCD212_DDR_MT_SHIFT 10
typedef uint8_t BYTE68K;
typedef uint16_t WORD68K;
typedef int16_t SWORD68K;
#define BYTE68K_MAX 255
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> mcd212_device
class mcd212_device : public device_t,
public device_video_interface
{
public:
typedef device_delegate<void (int)> scanline_callback_delegate;
// construction/destruction
mcd212_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto int_callback() { return m_int_callback.bind(); }
template <typename... T> void set_scanline_callback(T &&... args) { m_scanline_callback.set(std::forward<T>(args)...); }
// device members
uint16_t regs_r(offs_t offset, uint16_t mem_mask = ~0);
void regs_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
TIMER_CALLBACK_MEMBER( perform_scan );
bitmap_rgb32& get_bitmap() { return m_bitmap; }
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
struct channel_t
{
uint8_t csrr;
uint16_t csrw;
uint16_t dcr;
uint16_t vsr;
uint16_t ddr;
uint16_t dcp;
uint32_t dca;
uint8_t clut_r[256];
uint8_t clut_g[256];
uint8_t clut_b[256];
uint32_t image_coding_method;
uint32_t transparency_control;
uint32_t plane_order;
uint32_t clut_bank;
uint32_t transparent_color_a;
uint32_t reserved0;
uint32_t transparent_color_b;
uint32_t mask_color_a;
uint32_t reserved1;
uint32_t mask_color_b;
uint32_t dyuv_abs_start_a;
uint32_t dyuv_abs_start_b;
uint32_t reserved2;
uint32_t cursor_position;
uint32_t cursor_control;
uint32_t cursor_pattern[16];
uint32_t region_control[8];
uint32_t backdrop_color;
uint32_t mosaic_hold_a;
uint32_t mosaic_hold_b;
uint8_t weight_factor_a[768];
uint8_t weight_factor_b[768];
};
struct ab_t
{
//* Color limit array.
BYTE68K limit[3 * BYTE68K_MAX];
//* Color clamp array.
BYTE68K clamp[3 * BYTE68K_MAX];
//* U-to-B matrix array.
SWORD68K matrixUB[BYTE68K_MAX + 1];
//* U-to-G matrix array.
SWORD68K matrixUG[BYTE68K_MAX + 1];
//* V-to-G matrix array.
SWORD68K matrixVG[BYTE68K_MAX + 1];
//* V-to-R matrix array.
SWORD68K matrixVR[BYTE68K_MAX + 1];
//* Delta-Y decoding array.
BYTE68K deltaY[BYTE68K_MAX + 1];
//* Delta-U/V decoding array.
BYTE68K deltaUV[BYTE68K_MAX + 1];
};
protected:
// device-level overrides
virtual void device_resolve_objects() override;
virtual void device_start() override;
virtual void device_reset() override;
private:
// interrupt callbacks
devcb_write_line m_int_callback;
scanline_callback_delegate m_scanline_callback;
required_shared_ptr<uint16_t> m_planea;
required_shared_ptr<uint16_t> m_planeb;
// internal state
channel_t m_channel[2];
emu_timer *m_scan_timer;
uint8_t m_region_flag_0[768];
uint8_t m_region_flag_1[768];
bitmap_rgb32 m_bitmap;
static const uint32_t s_4bpp_color[16];
ab_t m_ab;
void update_region_arrays();
void set_vsr(int channel, uint32_t value);
uint32_t get_vsr(int channel);
void set_dcp(int channel, uint32_t value);
uint32_t get_dcp(int channel);
void set_display_parameters(int channel, uint8_t value);
void update_visible_area();
uint32_t get_screen_width();
void process_ica(int channel);
void process_dca(int channel);
void process_vsr(int channel, uint8_t *pixels_r, uint8_t *pixels_g, uint8_t *pixels_b);
void set_register(int channel, uint8_t reg, uint32_t value);
void mix_lines(uint8_t *plane_a_r, uint8_t *plane_a_g, uint8_t *plane_a_b, uint8_t *plane_b_r, uint8_t *plane_b_g, uint8_t *plane_b_b, uint32_t *out);
void draw_cursor(uint32_t *scanline, int y);
void draw_scanline(int y);
void ab_init();
};
// device type definition
DECLARE_DEVICE_TYPE(MCD212, mcd212_device)
#endif // MAME_VIDEO_MCD212_H
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