HD64461_GPBDR
v16 = inw(HD64461_GPBDR);
outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
v = inw(HD64461_GPBDR);
outw(v, HD64461_GPBDR);
v = inw(HD64461_GPBDR);
outw(v, HD64461_GPBDR);