RTW_MAR0
RTW_WRITE(regs, RTW_MAR0, 0xffffffff);
RTW_SYNC(regs, RTW_MAR0, RTW_RCR); /* RTW_MAR0 < RTW_MAR1 < RTW_RCR */
RTW_READ(regs, RTW_MAR0),
PRINTREG32(regs, RTW_MAR0);
RTW_WRITE(regs, RTW_MAR0, ntohl(t));
RTW_SYNC(regs, RTW_MAR0, RTW_RCR);
RTW_WRITE(regs, RTW_MAR0, 0);
RTW_SYNC(regs, RTW_MAR0, RTW_RCR);