EMU_CHAN_PSST
emu_wrptr(sc, ch, EMU_CHAN_PSST, 0);
emu_wrptr(sc, v->vnum, EMU_CHAN_PSST, sa | (l << 24));
emu_wrptr(sc, v->vnum, EMU_CHAN_PSST, v->sa | (v->amounts[2] << 24));
emu_wrptr(sc, ch, EMU_CHAN_PSST, 0);
#define EMU_CHAN_PSST_FXSENDAMOUNT_C EMU_MKSUBREG(8, 24, EMU_CHAN_PSST)
#define EMU_CHAN_PSST_LOOPSTARTADDR EMU_MKSUBREG(24, 0, EMU_CHAN_PSST)