137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
void io_hlt(void);
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void io_cli(void);
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void io_sti(void);
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void io_out8(int port, int data);
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int io_load_eflags(void);
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void io_store_eflags(int eflags);
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// void write_mem8(int addr, int data);
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void init_palette(void);
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void set_palette(int start, int end, unsigned char *rgb);
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void box_fill8(unsigned char *vram, int xsize, unsigned char c, int x0, int y0,
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int x1, int y1);
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#define COL8_000000 0
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#define COL8_FF0000 1
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#define COL8_00FF00 2
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#define COL8_FFFF00 3
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#define COL8_0000FF 4
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#define COL8_FF00FF 5
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#define COL8_00FFFF 6
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#define COL8_FFFFFF 7
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#define COL8_C6C6C6 8
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#define COL8_840000 9
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#define COL8_008400 10
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#define COL8_848400 11
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#define COL8_000084 12
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#define COL8_840084 13
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#define COL8_008484 14
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#define COL8_848484 15
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// 入口函数HariMain重命名为标准的main
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// 返回类型修改为int，避免编译器警告
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int main(void) {
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unsigned char *vram = (unsigned char *)0xa0000;
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int xSize = 320, ySize = 200;
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init_palette();
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box_fill8(vram, xSize, COL8_008484, 0, 0, xSize - 1, ySize - 29);
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box_fill8(vram, xSize, COL8_C6C6C6, 0, ySize - 28, xSize - 1, ySize - 28);
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box_fill8(vram, xSize, COL8_FFFFFF, 0, ySize - 27, xSize - 1, ySize - 27);
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box_fill8(vram, xSize, COL8_C6C6C6, 0, ySize - 26, xSize - 1, ySize - 1);
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box_fill8(vram, xSize, COL8_FFFFFF, 3, ySize - 24, 59, ySize - 24);
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box_fill8(vram, xSize, COL8_FFFFFF, 2, ySize - 24, 2, ySize - 4);
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box_fill8(vram, xSize, COL8_848484, 3, ySize - 4, 59, ySize - 4);
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box_fill8(vram, xSize, COL8_848484, 59, ySize - 23, 59, ySize - 5);
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box_fill8(vram, xSize, COL8_000000, 2, ySize - 4, 59, ySize - 3);
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box_fill8(vram, xSize, COL8_000000, 60, ySize - 24, 60, ySize - 3);
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box_fill8(vram, xSize, COL8_848484, xSize - 47, ySize - 24, xSize - 4,
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ySize - 24);
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box_fill8(vram, xSize, COL8_848484, xSize - 47, ySize - 23, xSize - 47,
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ySize - 4);
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box_fill8(vram, xSize, COL8_FFFFFF, xSize - 47, ySize - 3, xSize - 4,
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ySize - 3);
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box_fill8(vram, xSize, COL8_FFFFFF, xSize - 3, ySize - 24, xSize - 3,
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ySize - 3);
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for (;;) {
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io_hlt();
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}
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}
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// int main(void) {
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// unsigned char *p = (unsigned char *) 0xa0000;
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// init_palette();
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// for (int i = 0; i <= 0xffff; i++) {
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// // write_mem8(i, i & 0x0f);
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// *(p + i) = i & 0x0f;
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// }
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// box_fill8(p, 320, COL8_FF0000, 20, 20, 120, 120);
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// box_fill8(p, 320, COL8_00FF00, 70, 50, 170, 150);
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// box_fill8(p, 320, COL8_0000FF, 120, 80, 220, 180);
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// for (;;) {
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// io_hlt();
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// }
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// }
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void init_palette(void) {
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static unsigned char table_rgb[16 * 3] = {
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0x00, 0x00, 0x00, // 黑色
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0xff, 0x00, 0x00, // 亮红色
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0x00, 0xff, 0x00, // 亮绿色
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0xff, 0xff, 0x00, // 亮黄色
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0x00, 0x00, 0xff, // 亮蓝色
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0xff, 0x00, 0xff, // 亮紫色
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0x00, 0xff, 0xff, // 浅亮蓝色
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0xff, 0xff, 0xff, // 白色
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0xc6, 0xc6, 0xc6, // 亮灰色
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0x84, 0x00, 0x00, // 暗红色
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0x00, 0x84, 0x00, // 暗绿色
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0x84, 0x84, 0x00, // 暗黄色
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0x00, 0x00, 0x84, // 暗蓝色
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0x84, 0x00, 0x84, // 暗紫色
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0x00, 0x84, 0x84, // 浅暗蓝色
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0x84, 0x84, 0x84 // 暗灰色
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};
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set_palette(0, 15, table_rgb);
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return;
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}
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void set_palette(int start, int end, unsigned char *rgb) {
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int eflags = io_load_eflags(); // 记录标志
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io_cli(); // 禁止中断
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io_out8(0x03c8, start);
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for (int i = start; i <= end; i++) {
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io_out8(0x03c9, rgb[0] / 4);
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io_out8(0x03c9, rgb[1] / 4);
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io_out8(0x03c9, rgb[2] / 4);
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rgb += 3;
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}
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io_store_eflags(eflags);
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return;
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}
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void box_fill8(unsigned char *vram, int xsize, unsigned char c, int x0, int y0,
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int x1, int y1) {
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for (int y = y0; y <= y1; y++) {
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for (int x = x0; x <= x1; x++) {
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vram[y * xsize + x] = c;
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}
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}
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return;
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}
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