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// license:BSD-3-Clause
// copyright-holders:Barry Rodewald
/*
Cirrus Logic GD542x/3x video chipsets
*/
#ifndef MAME_VIDEO_CLGD542X_H
#define MAME_VIDEO_CLGD542X_H
#pragma once
#include "video/pc_vga.h"
MACHINE_CONFIG_EXTERN( pcvideo_cirrus_gd5428 );
MACHINE_CONFIG_EXTERN( pcvideo_cirrus_gd5430 );
class cirrus_gd5428_device : public svga_device
{
public:
// construction/destruction
cirrus_gd5428_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual READ8_MEMBER(port_03c0_r) override;
virtual WRITE8_MEMBER(port_03c0_w) override;
virtual READ8_MEMBER(port_03b0_r) override;
virtual WRITE8_MEMBER(port_03b0_w) override;
virtual READ8_MEMBER(port_03d0_r) override;
virtual WRITE8_MEMBER(port_03d0_w) override;
virtual READ8_MEMBER(mem_r) override;
virtual WRITE8_MEMBER(mem_w) override;
virtual uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) override;
protected:
cirrus_gd5428_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual uint16_t offset() override;
uint8_t m_chip_id;
uint8_t gc_mode_ext;
uint8_t gc_bank_0;
uint8_t gc_bank_1;
bool gc_locked;
uint8_t m_lock_reg;
uint8_t m_gr10; // high byte of background colour (in 15/16bpp)
uint8_t m_gr11; // high byte of foreground colour (in 15/16bpp)
uint8_t m_cr19;
uint8_t m_cr1a;
uint8_t m_cr1b;
// hardware cursor
uint16_t m_cursor_x;
uint16_t m_cursor_y;
uint16_t m_cursor_addr;
uint8_t m_cursor_attr;
bool m_ext_palette_enabled;
struct { uint8_t red, green, blue; } m_ext_palette[16]; // extra palette, colour 0 is cursor background, colour 15 is cursor foreground, colour 2 is overscan border colour
// BitBLT engine
uint8_t m_blt_status;
uint8_t m_blt_rop;
uint8_t m_blt_mode;
uint32_t m_blt_source;
uint32_t m_blt_dest;
uint16_t m_blt_source_pitch;
uint16_t m_blt_dest_pitch;
uint16_t m_blt_height;
uint16_t m_blt_width;
uint32_t m_blt_source_current;
uint32_t m_blt_dest_current;
uint16_t m_blt_trans_colour;
uint16_t m_blt_trans_colour_mask;
bool m_blt_system_transfer; // blit from system memory
uint8_t m_blt_system_count;
uint32_t m_blt_system_buffer;
uint16_t m_blt_pixel_count;
uint16_t m_blt_scan_count;
uint8_t m_scratchpad1;
uint8_t m_scratchpad2;
uint8_t m_scratchpad3;
uint8_t m_vclk_num[4];
uint8_t m_vclk_denom[4];
inline uint8_t cirrus_vga_latch_write(int offs, uint8_t data);
private:
void cirrus_define_video_mode();
uint8_t cirrus_seq_reg_read(uint8_t index);
void cirrus_seq_reg_write(uint8_t index, uint8_t data);
uint8_t cirrus_gc_reg_read(uint8_t index);
void cirrus_gc_reg_write(uint8_t index, uint8_t data);
uint8_t cirrus_crtc_reg_read(uint8_t index);
void cirrus_crtc_reg_write(uint8_t index, uint8_t data);
void start_bitblt();
void start_reverse_bitblt();
void start_system_bitblt();
void blit_dword();
void blit_byte(); // used for colour expanded system-to-vram bitblts
void copy_pixel(uint8_t src, uint8_t dst);
};
class cirrus_gd5430_device : public cirrus_gd5428_device
{
public:
cirrus_gd5430_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
virtual void device_start() override;
};
// device type definition
DECLARE_DEVICE_TYPE(CIRRUS_GD5428, cirrus_gd5428_device)
DECLARE_DEVICE_TYPE(CIRRUS_GD5430, cirrus_gd5430_device)
#endif // MAME_VIDEO_CLGD542X_H
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