ACON1
WRITEREG(acon1, ACON1);
acon1 = READREG(ACON1);
WRITEREG(acon1, ACON1);
WRITEREG(acon1, ACON1);
acon1 = READREG(ACON1);
WRITEREG(acon1, ACON1);
WRITEREG(acon1, ACON1);