我尝试将我的kernel.cpp转换为使用VESA，但我得到的只是一系列奇怪的错误。在tutorial之后，我使用以下代码使VESA Graphics的引导加载程序端工作得相当顺利：

mov ax, 0x4F02   ; set VBE mode
mov bx, 0x4118   ; VBE mode number
int 0x10         ; call VBE BIOS
cmp ax, 0x004F   ; test for error
jne error

;Get video mode info
mov ax, 4f01h
mov cx, 105h
mov di, modeInfo 
int 10h

然而，当我尝试从kernel.cpp绘制像素时，问题出现了。（我可以补充一点吗，它的变化范围也很大）。我试着从引导程序中绘制像素（来自here的代码），并且运行得很好，所以这个问题在kernel.cpp中。我遇到的一个常见错误是在屏幕顶部出现了一条随机的颜色，如here所示。在这里，我将保留该文件和我的GitHub（对于代码的其余部分）：
kernel.cpp:

//VIDEO MODE IN 1024x768x32bpp
typedef unsigned char uint8_t;
typedef unsigned char u8;
typedef unsigned short uint16_t;
typedef unsigned int u32;
typedef u32 size_t;
#define SCREEN_WIDTH 1024
#define SCREEN_HEIGHT 768
#define BPP 32
#define SCREEN_SIZE (SCREEN_WIDTH * SCREEN_HEIGHT)
#define FPS 30
#define PIT_HERTZ 1193131.666
#define CLOCK_HIT (int)(PIT_HERTZ/FPS)
#define KEY_LEFT 0x4B
#define KEY_UP 0x48
#define KEY_RIGHT 0x4D
#define KEY_DOWN 0x50

static u32 *BUFFER = (u32 *) 0xA0000;

// double buffers
u32 _sbuffers[2][SCREEN_SIZE];
u32 _sback = 0;

#define CURRENT (_sbuffers[_sback])
#define SWAP() (_sback = 1 - _sback)

#define screen_buffer() (_sbuffers[_sback])

// #define screen_set(_p, _x, _y)\
//     (_sbuffers[_sback][((_y)/* * pitch */ + ((_x) * (BPP/8)))]=(_p))

//u32 pixel_offset = y * pitch + (x * (bpp/8)) + framebuffer;

static inline void outb(uint16_t port, uint8_t val)
{
    asm volatile ( "outb %0, %1" : : "a"(val), "Nd"(port) );
}

//+++++++++++This is the troublesome function++++++++++++++++++
void screen_set(u32 color,int x,int y) {
    _sbuffers[_sback][y * SCREEN_WIDTH + (x * (BPP/8))]=color;
}
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
static inline uint8_t inb(uint16_t port)
{
    uint8_t ret;
    asm volatile ( "inb %1, %0"
                   : "=a"(ret)
                   : "Nd"(port) );
    return ret;
}

const unsigned char font[128-32][8] = {
    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0020 (space)
           /*hidden to help length if code...*/
    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}    // U+007F
};

static inline void *memcpy(void *dst, const void *src, size_t n)
{
    u8 *d = (u8*)dst;
    const u8 *s = (const u8*)src;

    while (n-- > 0) {
        *d++ = *s++;
    }

    return d;
}

void screen_swap() {
    memcpy(BUFFER, CURRENT, SCREEN_SIZE);
    SWAP();
}

unsigned read_pit(void) {
    unsigned count = 0;
 
    // al = channel in bits 6 and 7, remaining bits clear
    outb(0x43,0b0000000);
 
    count = inb(0x40);          // Low byte
    count |= inb(0x40)<<8;      // High byte
 
    return count;
}
 
void draw_char(char c, int x, int y, u32 color)
{
    const unsigned char *glyph = font[(int)c-32];
 
    for(int cy=0;cy<8;cy++){
        for(int cx=0;cx<8;cx++){
            if(((int)glyph[cy]&(1<<cx))==(1<<cx)){
                screen_set(color,x+cx,y+cy);
            }
        } 
    }
}

void draw_string(const char * s, int x, int y, u32 color) {
    int i = 0;
    while(s[i] != false) {
        draw_char(s[i],x+(i*8),y,color);
        i++;
    }
}

void draw_rect(int pos_x, int pos_y, int w, int h, u32 color) {
    for(int y = 0; y<h; y++) {
        for(int x = 0; x<w; x++) {
            screen_set(color,x+pos_x,y+pos_y);
        }
    }
}

static void render(int c0, int c1) {
    //draw_rect(0,0,SCREEN_WIDTH,SCREEN_HEIGHT,0x09);
    //draw_string("Hello, reader. This is written text.", 100, 180, 16777215);
    //draw_string("If this is displayed, my code works.", 100+c0, 100+c1, 16777215);
}

extern "C" void main(){
    
    int clock = 0;
    int incC1 = 0;
    int incC0 = 0;
    while(true) {
        uint16_t scancode = (uint16_t) inb(0x60);
        clock++;
        if(read_pit()!= 0 && clock == CLOCK_HIT) {
            if(scancode == KEY_LEFT) {
                incC0--;
            }else if(scancode == KEY_RIGHT) {
                incC0++;
            }
            if(scancode == KEY_DOWN) {
                incC1++;
            }else if(scancode == KEY_UP) {
                incC1--;
            }
            clock = 0;
            render(incC0,incC1);
            screen_swap();
        }
    }

    return;
}