tryby.c

#include<stdio.h>
#include<conio.h>
#include<dos.h>

#define VGA_AC_INDEX 0x3C0
#define VGA_AC_WRITE 0x3C0
#define VGA_AC_READ 0x3C1
#define VGA_MISC_WRITE 0x3C2
#define VGA_SEQ_INDEX 0x3C4
#define VGA_SEQ_DATA 0x3C5
#define VGA_DAC_READ_INDEX 0x3C7
#define VGA_DAC_WRITE_INDEX 0x3C8
#define VGA_DAC_DATA 0x3C9
#define VGA_MISC_READ 0x3CC
#define VGA_GC_INDEX 0x3CE
#define VGA_GC_DATA 0x3CF

#define VGA_CRTC_INDEX 0x3D4
#define VGA_CRTC_DATA 0x3D5
#define VGA_INSTAT_READ 0x3DA

#define VGA_NUM_SEQ_REGS 5
#define VGA_NUM_CRTC_REGS 25
#define VGA_NUM_GC_REGS 9
#define VGA_NUM_AC_REGS 21
#define VGA_NUM_REGS (1 + VGA_NUM_SEQ_REGS + VGA_NUM_CRTC_REGS + VGA_NUM_GC_REGS + VGA_NUM_AC_REGS)

unsigned char values[VGA_NUM_REGS];

void setVideoMode(unsigned char mode)
{
        union REGS regs;
        regs.h.ah=0;
        regs.h.al=mode;
        int86(0x10,&regs,&regs);
}

void read_regs(unsigned char *regs)
{
        unsigned int i;
        unsigned char value;
        //MISC
        *regs = inportb(VGA_MISC_READ);
        regs++;
        //SEQ
        for(i = 0; i< VGA_NUM_SEQ_REGS; i++)
        {
                outportb(VGA_SEQ_INDEX, i);
                //delay(1000);
                value = inportb(VGA_SEQ_DATA);
                *regs = value;
                regs++;
        }
        //CRTC
        for(i = 0; i< VGA_NUM_CRTC_REGS; i++)
        {
                outportb(VGA_CRTC_INDEX, i);
                //delay(1000);
                *regs = inportb(VGA_CRTC_DATA);
                regs++;
        }
        //GC
        for(i = 0; i< VGA_NUM_GC_REGS; i++)
        {
                outportb(VGA_GC_INDEX, i);
                //delay(1000);
                *regs = inportb(VGA_GC_DATA);
                regs++;
        }
        //AC
        for(i = 0; i< VGA_NUM_AC_REGS; i++)
        {

                (void)inportb(VGA_INSTAT_READ);
                //delay(1000);
                outportb(VGA_AC_INDEX, i);
                //delay(1000);
                *regs = inportb(VGA_AC_READ);
                regs++;
        }
        (void)inportb(VGA_INSTAT_READ);
        outportb(VGA_AC_INDEX, 0x20);
}

void dump(unsigned char *regs, unsigned count, FILE* f)
{
        unsigned i;
        i = 0;
        fprintf(f, "\t");
        for(; count !=0; count--)
        {
                fprintf(f, "0x%02X,", *regs);
                i++;
                if(i >= 8)
                {
                        i = 0;
                        fprintf(f, "\n\t");
                }
                else fprintf(f, " ");
                regs++;
        }
        fprintf(f, "\n");
}

void dump_regs(unsigned char *regs, FILE* f)
{
        fprintf(f, "unsigned char g_mode[] =\n");
        fprintf(f, "{\n");
        //MISC
        fprintf(f, "/* MISC */\n");
        fprintf(f, "\t0x%02X, \n", *regs);
        regs++;
        //SEQ
        fprintf(f, "/* SEQ */\n");
        dump(regs, VGA_NUM_SEQ_REGS, f);
        regs += VGA_NUM_SEQ_REGS;
        //CRTC
        fprintf(f, "/* CRTC */\n");
        dump(regs, VGA_NUM_CRTC_REGS, f);
        regs += VGA_NUM_CRTC_REGS;
        //GC
        fprintf(f, "/* GC */\n");
        dump(regs, VGA_NUM_GC_REGS, f);
        regs += VGA_NUM_GC_REGS;
        //AC
        fprintf(f, "/* AC */\n");
        dump(regs, VGA_NUM_AC_REGS, f);
        regs += VGA_NUM_AC_REGS;
        fprintf(f, "};\n");
}

void main(void)
{
        /*read_regs(values);
        //setVideoMode(3);
        printf("%d", (int)values[2]);
        getch();*/
        //FILE* f = NULL;
        char buff[50];
        int mode = 0;
        //setVideoMode(3);
        //f = fopen("DUPA.TXT", "w");
        //read_regs(values, f);
        //fclose(f);

        for (; mode<=7; mode++)
        {
            FILE *f = NULL;
            setVideoMode(mode);
            sprintf(buff, "mode_%d.txt", mode);
            read_regs(values);
            f = fopen(buff, "w");
            dump_regs(values, f);
            fclose(f);
            printf("Mode: %d\n", mode);
        }

        mode = 0x0D;
        for (; mode<=0x13; mode++)
        {
            FILE *f = NULL;
            setVideoMode(mode);
            sprintf(buff, "mode_%d.txt", mode);
            read_regs(values);
            f = fopen(buff, "w");
            dump_regs(values, f);
            fclose(f);
            printf("Mode: %d\n", mode);
        }
        setVideoMode(0x3);
        printf("End Mode: 0x%02X", mode);
        sound(440);
        delay(1000);
        nosound();
        getch();
}