11/45 progress

Jay> You wrote... Jay> Yeah, it's a UART. But I assumed you wrote data to a register, Jay> then wrote data to a different register to strobe the data out, Jay> etc. So I figured the first register was just a temporary buffer Jay> that would hold it's contents until replaced by data in the Jay> opposite direction. My bad. DEC UARTs have a receive and a transmit register. Receive is read-only, of course. Transmit could be write-only or read-write. I would have expected read-write. Usual practice was to make things read-write if they had to be writeable, as an aid to diagnostics. Write-only registers are a real pain for diagnostics writers because you can't tell if the bits are working, so DEC avoided them as a normal design practice. paul