vgasrc/stdvga.h

#ifndef __STDVGA_H
#define __STDVGA_H

#include "types.h" // u8

// VGA registers
#define VGAREG_ACTL_ADDRESS            0x3c0
#define VGAREG_ACTL_WRITE_DATA         0x3c0
#define VGAREG_ACTL_READ_DATA          0x3c1

#define VGAREG_INPUT_STATUS            0x3c2
#define VGAREG_WRITE_MISC_OUTPUT       0x3c2
#define VGAREG_VIDEO_ENABLE            0x3c3
#define VGAREG_SEQU_ADDRESS            0x3c4
#define VGAREG_SEQU_DATA               0x3c5

#define VGAREG_PEL_MASK                0x3c6
#define VGAREG_DAC_STATE               0x3c7
#define VGAREG_DAC_READ_ADDRESS        0x3c7
#define VGAREG_DAC_WRITE_ADDRESS       0x3c8
#define VGAREG_DAC_DATA                0x3c9

#define VGAREG_READ_FEATURE_CTL        0x3ca
#define VGAREG_READ_MISC_OUTPUT        0x3cc

#define VGAREG_GRDC_ADDRESS            0x3ce
#define VGAREG_GRDC_DATA               0x3cf

#define VGAREG_MDA_CRTC_ADDRESS        0x3b4
#define VGAREG_MDA_CRTC_DATA           0x3b5
#define VGAREG_VGA_CRTC_ADDRESS        0x3d4
#define VGAREG_VGA_CRTC_DATA           0x3d5

#define VGAREG_MDA_WRITE_FEATURE_CTL   0x3ba
#define VGAREG_VGA_WRITE_FEATURE_CTL   0x3da
#define VGAREG_ACTL_RESET              0x3da

#define VGAREG_MDA_MODECTL             0x3b8
#define VGAREG_CGA_MODECTL             0x3d8
#define VGAREG_CGA_PALETTE             0x3d9

/* Video memory */
#define SEG_GRAPH 0xA000
#define SEG_CTEXT 0xB800
#define SEG_MTEXT 0xB000

// stdvga.c
void stdvga_set_cga_background_color(u8 color);
void stdvga_set_cga_palette(u8 palid);
void stdvga_set_overscan_border_color(u8 color);
u8 stdvga_get_overscan_border_color(void);
void stdvga_set_all_palette_reg(u16 seg, u8 *data_far);
void stdvga_get_all_palette_reg(u16 seg, u8 *data_far);
void stdvga_set_palette_blinking(u8 enable_blink);
void stdvga_select_video_dac_color_page(u8 flag, u8 data);
void stdvga_read_video_dac_state(u8 *pmode, u8 *curpage);
void stdvga_perform_gray_scale_summing(u16 start, u16 count);
void stdvga_set_text_block_specifier(u8 spec);
void stdvga_planar4_plane(int plane);
void stdvga_load_font(u16 seg, void *src_far, u16 count
                      , u16 start, u8 destflags, u8 fontsize);
u16 stdvga_get_crtc(void);
struct vgamode_s;
int stdvga_vram_ratio(struct vgamode_s *vmode_g);
void stdvga_set_cursor_shape(u16 cursor_type);
void stdvga_set_cursor_pos(int address);
void stdvga_set_scan_lines(u8 lines);
u16 stdvga_get_vde(void);
int stdvga_get_window(struct vgamode_s *curmode_g, int window);
int stdvga_set_window(struct vgamode_s *curmode_g, int window, int val);
int stdvga_minimum_linelength(struct vgamode_s *vmode_g);
int stdvga_get_linelength(struct vgamode_s *curmode_g);
int stdvga_set_linelength(struct vgamode_s *curmode_g, int val);
int stdvga_get_displaystart(struct vgamode_s *curmode_g);
int stdvga_set_displaystart(struct vgamode_s *curmode_g, int val);
int stdvga_get_dacformat(struct vgamode_s *curmode_g);
int stdvga_set_dacformat(struct vgamode_s *curmode_g, int val);
int stdvga_save_restore(int cmd, u16 seg, void *data);
void stdvga_enable_video_addressing(u8 disable);
int stdvga_setup(void);

#endif // stdvga.h