ICW1_SELECT
ICW1_SELECT | ICW1_IC4;
ICW1_SELECT | ICW1_IC4;
REGVAL8(HTB_IO_BASE + IO_ICU1 + PIC_ICW1) = ICW1_SELECT | ICW1_IC4;
REGVAL8(HTB_IO_BASE + IO_ICU2 + PIC_ICW1) = ICW1_SELECT | ICW1_IC4;