#define __VGATABLES_H
#include "types.h" // u8
+#include "farptr.h" // struct segoff_s
/*
*
#define SEG_MTEXT 0xB000
/*
- *
* Tables of default values for each mode
- *
*/
-#define TEXT 0x00
-#define GRAPH 0x01
+#define TEXT 0x80
-#define CTEXT 0x00
-#define MTEXT 0x01
+#define CTEXT (0x00 | TEXT)
+#define MTEXT (0x01 | TEXT)
#define CGA 0x02
#define PLANAR1 0x03
#define PLANAR4 0x04
#define LINEAR24 0x12
#define LINEAR32 0x13
-#define SCROLL_DOWN 0
-#define SCROLL_UP 1
-#define NO_ATTR 2
-#define WITH_ATTR 3
-
-#define SCREEN_SIZE(x,y) (((x*y*2)|0x00ff)+1)
-#define SCREEN_MEM_START(x,y,p) ((((x*y*2)|0x00ff)+1)*p)
-#define SCREEN_IO_START(x,y,p) ((((x*y)|0x00ff)+1)*p)
+#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 {
struct vgamode_s {
u8 svgamode;
struct VideoParam_s *vparam;
- u8 class; /* TEXT, GRAPH */
u8 memmodel; /* CTEXT,MTEXT,CGA,PL1,PL2,PL4,P8,P15,P16,P24,P32 */
u8 pixbits;
u16 sstart;
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 u8 vgafont16alt[];
// vga.c
-u16 biosfn_get_cursor_pos(u8 page);
+struct carattr {
+ u8 car, attr, use_attr;
+};
+struct cursorpos {
+ u8 x, y, page;
+};
// vgafb.c
-void biosfn_scroll(u8 nblines, u8 attr, u8 rul, u8 cul, u8 rlr, u8 clr
- , u8 page, u8 dir);
-void biosfn_write_char_attr(u8 car, u8 page, u8 attr, u16 count);
-void biosfn_write_char_only(u8 car, u8 page, u8 attr, u16 count);
-void biosfn_read_char_attr(u8 page, u16 *car);
-void biosfn_write_pixel(u8 BH, u8 AL, u16 CX, u16 DX);
-void biosfn_read_pixel(u8 BH, u16 CX, u16 DX, u16 *AX);
-void biosfn_load_text_user_pat(u16 ES, u16 BP, u16 CX, u16 DX, u8 BL, u8 BH);
-void biosfn_load_text_8_14_pat(u8 BL);
-void biosfn_load_text_8_8_pat(u8 BL);
-void biosfn_load_text_8_16_pat(u8 BL);
+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 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 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 release_font_access();
void vgahw_set_cursor_pos(u16 address);
void vgahw_set_scan_lines(u8 lines);
u16 vgahw_get_vde();
+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();