#include "types.h" // u8
#include "farptr.h" // struct segoff_s
-#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;
+
+extern struct VideoParam_s video_param_table[29];
struct saveBDAstate {
u8 video_mode;
struct segoff_s font1;
};
-// vgatables.c
-struct vgamode_s;
-struct vgamode_s *find_vga_entry(u8 mode);
-void build_video_param(void);
-extern struct VideoSavePointer_s video_save_pointer_table;
-extern u8 static_functionality[];
+// Mode flags
+#define MF_GRAYSUM 0x0002
+#define MF_NOPALETTE 0x0008
+#define MF_CUSTOMCRTC 0x0800
+#define MF_LINEARFB 0x4000
+#define MF_NOCLEARMEM 0x8000
+
+// Memory model types
+#define MM_TEXT 0x00
+#define MM_CGA 0x01
+#define MM_HERCULES 0x02
+#define MM_PLANAR 0x03
+#define MM_PACKED 0x04
+#define MM_NON_CHAIN_4_256 0x05
+#define MM_DIRECT 0x06
+#define MM_YUV 0x07
+
+struct vgamode_s {
+ u8 memmodel;
+ u16 width;
+ u16 height;
+ u8 depth;
+ u8 cwidth;
+ u8 cheight;
+ u16 sstart;
+};
// vgafonts.c
extern u8 vgafont8[];
extern u8 vgafont16alt[];
// vgabios.c
+extern int VgaBDF;
#define SET_VGA(var, val) SET_FARVAR(get_global_seg(), (var), (val))
struct carattr {
u8 car, attr, use_attr;
struct cursorpos {
u8 x, y, page;
};
-void vga_set_mode(u8 mode, u8 noclearmem);
+u16 calc_page_size(u8 memmodel, u16 width, u16 height);
+struct vgamode_s *get_current_mode(void);
+void modeswitch_set_bda(int mode, int flags, struct vgamode_s *vmode_g);
// 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);
void vgafb_write_pixel(u8 color, u16 x, u16 y);
u8 vgafb_read_pixel(u16 x, u16 y);
-// clext.c
-int cirrus_set_video_mode(u8 mode, u8 noclearmem);
-void cirrus_init(void);
-
// vbe.c
+u32 VBE_total_memory;
+u32 VBE_capabilities;
+u32 VBE_framebuffer;
+u16 VBE_win_granularity;
#define VBE_OEM_STRING "SeaBIOS VBE(C) 2011"
#define VBE_VENDOR_STRING "SeaBIOS Developers"
#define VBE_PRODUCT_STRING "SeaBIOS VBE Adapter"
#define VBE_REVISION_STRING "Rev. 1"
-
-struct vbe_modeinfo
-{
- u16 width;
- u16 height;
- u8 depth;
- u16 linesize;
- u32 phys_base;
- u32 vram_size;
-};
-
struct bregs;
void handle_104f(struct bregs *regs);