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#ifndef __VGATABLES_H
#define __VGATABLES_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
/*
*
* Tables of default values for each mode
*
*/
#define TEXT 0x00
#define GRAPH 0x01
#define CTEXT 0x00
#define MTEXT 0x01
#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 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)
/* 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 class; /* TEXT, GRAPH */
u8 memmodel; /* CTEXT,MTEXT,CGA,PL1,PL2,PL4,P8,P15,P16,P24,P32 */
u8 pixbits;
u16 sstart;
u8 pelmask;
u8 *dac;
u16 dacsize;
};
// 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
void biosfn_set_single_palette_reg(u8 reg, u8 val);
u8 biosfn_get_single_palette_reg(u8 reg);
// clext.c
void cirrus_set_video_mode(u8 mode);
void cirrus_init();
#endif // vgatables.h
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