HDE
par->HDE = gend1 - par->HHT - 2 - hde_off / prescale;
if ((par->HDB & 0x200) && (par->HDB & ~0x200) - par->HDE <= 5) {
unsigned short HRE, HBE, HRS, HDE;
HDE = crdata[1] | ((unsigned short)(sr_data & 0x0C) << 6);
E = HDE + 1;