mirror of
https://github.com/yourtion/30dayMakeOS.git
synced 2026-02-03 01:53:24 +08:00
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
void io_hlt(void);
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void io_cli(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 init_palette(void);
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void set_palette(int start, int end, unsigned char *rgb);
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void boxfill8(unsigned char *vram, int xsize, unsigned char c, int x0, int y0, int x1, int y1);
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void init_screen(char *vram, int x, int y);
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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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void HariMain(void)
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{
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char *vram;
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int xsize, ysize;
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short *binfo_scrnx, *binfo_scrny;
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int *binfo_vram;
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init_palette();
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binfo_scrnx = (short *) 0x0ff4;
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binfo_scrny = (short *) 0x0ff6;
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binfo_vram = (int *) 0x0ff8;
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xsize = *binfo_scrnx;
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ysize = *binfo_scrny;
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vram = (char *) *binfo_vram;
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init_screen(vram, xsize, ysize);
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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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{
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static unsigned char table_rgb[16 * 3] = {
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0x00, 0x00, 0x00, /* 0:黒 */
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0xff, 0x00, 0x00, /* 1:明るい赤 */
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0x00, 0xff, 0x00, /* 2:明るい緑 */
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0xff, 0xff, 0x00, /* 3:明るい黄色 */
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0x00, 0x00, 0xff, /* 4:明るい青 */
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0xff, 0x00, 0xff, /* 5:明るい紫 */
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0x00, 0xff, 0xff, /* 6:明るい水色 */
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0xff, 0xff, 0xff, /* 7:白 */
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0xc6, 0xc6, 0xc6, /* 8:明るい灰色 */
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0x84, 0x00, 0x00, /* 9:暗い赤 */
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0x00, 0x84, 0x00, /* 10:暗い緑 */
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0x84, 0x84, 0x00, /* 11:暗い黄色 */
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0x00, 0x00, 0x84, /* 12:暗い青 */
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0x84, 0x00, 0x84, /* 13:暗い紫 */
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0x00, 0x84, 0x84, /* 14:暗い水色 */
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0x84, 0x84, 0x84 /* 15:暗い灰色 */
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};
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set_palette(0, 15, table_rgb);
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return;
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/* static char 命令は、データにしか使えないけどDB命令相当 */
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}
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void set_palette(int start, int end, unsigned char *rgb)
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{
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int i, eflags;
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eflags = io_load_eflags(); /* 割り込み許可フラグの値を記録する */
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io_cli(); /* 許可フラグを0にして割り込み禁止にする */
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io_out8(0x03c8, start);
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for (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); /* 割り込み許可フラグを元に戻す */
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return;
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}
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void boxfill8(unsigned char *vram, int xsize, unsigned char c, int x0, int y0, int x1, int y1)
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{
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int x, y;
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for (y = y0; y <= y1; y++) {
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for (x = x0; x <= x1; x++)
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vram[y * xsize + x] = c;
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}
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return;
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}
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void init_screen(char *vram, int x, int y)
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{
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boxfill8(vram, x, COL8_008484, 0, 0, x - 1, y - 29);
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boxfill8(vram, x, COL8_C6C6C6, 0, y - 28, x - 1, y - 28);
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boxfill8(vram, x, COL8_FFFFFF, 0, y - 27, x - 1, y - 27);
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boxfill8(vram, x, COL8_C6C6C6, 0, y - 26, x - 1, y - 1);
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boxfill8(vram, x, COL8_FFFFFF, 3, y - 24, 59, y - 24);
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boxfill8(vram, x, COL8_FFFFFF, 2, y - 24, 2, y - 4);
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boxfill8(vram, x, COL8_848484, 3, y - 4, 59, y - 4);
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boxfill8(vram, x, COL8_848484, 59, y - 23, 59, y - 5);
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boxfill8(vram, x, COL8_000000, 2, y - 3, 59, y - 3);
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boxfill8(vram, x, COL8_000000, 60, y - 24, 60, y - 3);
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boxfill8(vram, x, COL8_848484, x - 47, y - 24, x - 4, y - 24);
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boxfill8(vram, x, COL8_848484, x - 47, y - 23, x - 47, y - 4);
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boxfill8(vram, x, COL8_FFFFFF, x - 47, y - 3, x - 4, y - 3);
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boxfill8(vram, x, COL8_FFFFFF, x - 3, y - 24, x - 3, y - 3);
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return;
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}
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