LNB_BASE
#define LNB_CONTROL(i) (LNB_BASE + (i) * 0x20 + 0x00)
#define LNB_BUF_LEVEL(i) (LNB_BASE + (i) * 0x20 + 0x10)
#define LNB_BUF_WRITE(i) (LNB_BASE + (i) * 0x20 + 0x14)