--- /dev/null
+#ifndef __VGATABLES_H
+#define __VGATABLES_H
+
+#include "types.h" // u8
+#include "farptr.h" // struct segoff_s
+
+/*
+ *
+ * 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
+
+/*
+ * Tables of default values for each mode
+ */
+#define TEXT 0x80
+
+#define CTEXT (0x00 | TEXT)
+#define MTEXT (0x01 | TEXT)
+#define CGA 0x02
+#define PLANAR1 0x03
+#define PLANAR4 0x04
+#define LINEAR8 0x05
+
+// for SVGA
+#define LINEAR15 0x10
+#define LINEAR16 0x11
+#define LINEAR24 0x12
+#define LINEAR32 0x13
+
+#define SCREEN_IO_START(x,y,p) (((((x)*(y)) | 0x00ff) + 1) * (p))
+#define SCREEN_MEM_START(x,y,p) SCREEN_IO_START(((x)*2),(y),(p))
+
+/* standard BIOS Video Parameter Table */
+struct VideoParam_s {
+ u8 twidth;
+ u8 theightm1;
+ u8 cheight;
+ u16 slength;
+ u8 sequ_regs[4];
+ u8 miscreg;
+ u8 crtc_regs[25];
+ u8 actl_regs[20];
+ u8 grdc_regs[9];
+} PACKED;
+
+struct vgamode_s {
+ u8 svgamode;
+ struct VideoParam_s *vparam;
+ u8 memmodel; /* CTEXT,MTEXT,CGA,PL1,PL2,PL4,P8,P15,P16,P24,P32 */
+ u8 pixbits;
+ u16 sstart;
+ u8 pelmask;
+ u8 *dac;
+ u16 dacsize;
+};
+
+struct saveVideoHardware {
+ u8 sequ_index;
+ u8 crtc_index;
+ u8 grdc_index;
+ u8 actl_index;
+ u8 feature;
+ u8 sequ_regs[4];
+ u8 sequ0;
+ u8 crtc_regs[25];
+ u8 actl_regs[20];
+ u8 grdc_regs[9];
+ u16 crtc_addr;
+ u8 plane_latch[4];
+};
+
+struct saveBDAstate {
+ u8 video_mode;
+ u16 video_cols;
+ u16 video_pagesize;
+ u16 crtc_address;
+ u8 video_rows;
+ u16 char_height;
+ u8 video_ctl;
+ u8 video_switches;
+ u8 modeset_ctl;
+ u16 cursor_type;
+ u16 cursor_pos[8];
+ u16 video_pagestart;
+ u8 video_page;
+ /* current font */
+ struct segoff_s font0;
+ struct segoff_s font1;
+};
+
+struct saveDACcolors {
+ u8 rwmode;
+ u8 peladdr;
+ u8 pelmask;
+ u8 dac[768];
+ u8 color_select;
+};
+
+// vgatables.c
+struct vgamode_s *find_vga_entry(u8 mode);
+extern u16 video_save_pointer_table[];
+extern struct VideoParam_s video_param_table[];
+extern u8 static_functionality[];
+
+// vgafonts.c
+extern u8 vgafont8[];
+extern u8 vgafont14[];
+extern u8 vgafont16[];
+extern u8 vgafont14alt[];
+extern u8 vgafont16alt[];
+
+// vga.c
+struct carattr {
+ u8 car, attr, use_attr;
+};
+struct cursorpos {
+ u8 x, y, page;
+};
+
+// vgafb.c
+void clear_screen(struct vgamode_s *vmode_g);
+void vgafb_scroll(int nblines, int attr
+ , struct cursorpos ul, struct cursorpos lr);
+void vgafb_write_char(struct cursorpos cp, struct carattr ca);
+struct carattr vgafb_read_char(struct cursorpos cp);
+void vgafb_write_pixel(u8 color, u16 x, u16 y);
+u8 vgafb_read_pixel(u16 x, u16 y);
+void vgafb_load_font(u16 seg, void *src_far, u16 count
+ , u16 start, u8 destflags, u8 fontsize);
+
+// vgaio.c
+void vgahw_screen_disable(void);
+void vgahw_screen_enable(void);
+void vgahw_set_border_color(u8 color);
+void vgahw_set_overscan_border_color(u8 color);
+u8 vgahw_get_overscan_border_color(void);
+void vgahw_set_palette(u8 palid);
+void vgahw_set_single_palette_reg(u8 reg, u8 val);
+u8 vgahw_get_single_palette_reg(u8 reg);
+void vgahw_set_all_palette_reg(u16 seg, u8 *data_far);
+void vgahw_get_all_palette_reg(u16 seg, u8 *data_far);
+void vgahw_toggle_intensity(u8 flag);
+void vgahw_select_video_dac_color_page(u8 flag, u8 data);
+void vgahw_read_video_dac_state(u8 *pmode, u8 *curpage);
+void vgahw_set_dac_regs(u16 seg, u8 *data_far, u8 start, int count);
+void vgahw_get_dac_regs(u16 seg, u8 *data_far, u8 start, int count);
+void vgahw_set_pel_mask(u8 val);
+u8 vgahw_get_pel_mask(void);
+void vgahw_save_dac_state(u16 seg, struct saveDACcolors *info);
+void vgahw_restore_dac_state(u16 seg, struct saveDACcolors *info);
+void vgahw_sequ_write(u8 index, u8 value);
+void vgahw_grdc_write(u8 index, u8 value);
+void vgahw_set_text_block_specifier(u8 spec);
+void get_font_access(void);
+void release_font_access(void);
+void vgahw_set_cursor_shape(u8 start, u8 end);
+void vgahw_set_active_page(u16 address);
+void vgahw_set_cursor_pos(u16 address);
+void vgahw_set_scan_lines(u8 lines);
+u16 vgahw_get_vde(void);
+void vgahw_save_state(u16 seg, struct saveVideoHardware *info);
+void vgahw_restore_state(u16 seg, struct saveVideoHardware *info);
+void vgahw_set_mode(struct VideoParam_s *vparam_g);
+void vgahw_enable_video_addressing(u8 disable);
+void vgahw_init(void);
+
+// clext.c
+void cirrus_set_video_mode(u8 mode);
+void cirrus_init(void);
+
+// vbe.c -- not implemented yet.
+#define VBE_DISPI_DISABLED 0x00
+void dispi_set_enable(int enable);
+void vbe_init(void);
+int vbe_has_vbe_display(void);
+
+#endif // vgatables.h
