GITS_CWRITER
cwriter = gits_read_8(its, GITS_CWRITER);
gits_write_8(its, GITS_CWRITER, woff);
woff = gits_read_8(its, GITS_CWRITER) & GITS_CWRITER_Offset;
gits_read_8(its, GITS_CREADR), gits_read_8(its, GITS_CWRITER));
gits_write_8(its, GITS_CWRITER, 0);