| /kernel/trunk/kernel.asm |
|---|
| 2944,20 → 2944,22 |
| ; edx = [top]*65536 + [bottom] |
| mov eax, [_display.width] |
| mov ebx, [_display.height] |
| dec eax |
| dec ebx |
| ; check [right] |
| cmp cx, ax |
| jae .exit |
| ja .exit |
| ; check [left] |
| ror ecx, 16 |
| cmp cx, ax |
| jae .exit |
| ja .exit |
| ; check [bottom] |
| cmp dx, bx |
| jae .exit |
| ja .exit |
| ; check [top] |
| ror edx, 16 |
| cmp dx, bx |
| jae .exit |
| ja .exit |
| movzx eax, cx ; [left] |
| movzx ebx, dx ; [top] |