for the record I was just messing with arcane baud speeds, both 300 and 600, nothing worked properly till hitting the 1200 mark
for me it was a sanity check, I cant imagine why anyone would actually want to use those speeds, even the 1986 computer I was using with a 1984 rom nails 9600 (actually 115,200 if you get into twiddling bits in machine language)