static void checkport(int start, int end) { if(iounused(start, end)) return; error(Eperm); }
static void checkport(int start, int end) { /* standard vga regs are OK */ if (start >= 0x2b0 && end <= 0x2df + 1) return; if (start >= 0x3c0 && end <= 0x3da + 1) return; if (iounused(start, end)) return; error(EPERM, NULL); }