GTTY - A Glass TTY + Load paper tape software into a

I've had the same question in reverse whenever I've released a program (e.g. the HP calculator LIF Untilies for Linux). People want an MS-DOS or Windows version. My reply is always the same. I've published the source code. If you want a version for another machine or OS, then write it yourself :-). I've written it for Linux becasue that's what I use. I believe the sourve for GTTY has been released too. It should therefore be possible to port it. I'm interested in knowing what was done with the reader-run loop from the PDP8? The DEC specification (deduced from the scheamtics, etc) is that when the PDP8 (or PDP11) wants to read a character from the paper tape, it passes a current through this look. This energises the reader run relay, the TTY reads a character and starts to serialise it. When the Start bit is received by the PDP8, the loop is opened again. The reader/TTY sends no more characeters until there's a current in the reader run loop again. Many UARTs seem to buffer at least one extra chracter and may well have problems with this. There's also a hardware problem in that AFAIK the DEC card never tried to provide an RS232 equivalent to this signal, and most, if not all, commercial currnet loop converters ignore it. I will have to look at the source to GTTY to see if this was simply ignored (I hope not, a heck of a lot of stuff would break...) or what. -tony