[cctalk] Re: Bit-banging nightmares, wa: Re: Re: RS232 then and now (bitbanging)

I am reminded of the Regitel system, a POS system from the early 1970's.  We ran 64 model 33's off of a three-or-four board Regitel mux on a Nova 800; you'd basically load a bunch of registers with the current bit for each port and it would bang them out; input was the reverse.  It was on the processor to the requisite mask-and-shift operations to get the bits to the right place.