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Diffstat (limited to '')
| -rw-r--r-- | kernel/cio.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/cio.c b/kernel/cio.c index 1e5cb3c..deb6b76 100644 --- a/kernel/cio.c +++ b/kernel/cio.c @@ -67,8 +67,9 @@ static void (*notify)(int); // calculate the memory address of a specific character position // within VGA memory -#define VIDEO_ADDR(x, y) \ - (unsigned short *)(VID_BASE_ADDR + 2 * ((y) * SCREEN_X_SIZE + (x))) +#define VIDEO_ADDR(x, y) \ + (unsigned short *)((VID_BASE_ADDR + 2 * ((y) * SCREEN_X_SIZE + (x))) | \ + 0x80000000) // port addresses #define VGA_CTRL_IX_ADDR 0x3d4 |