On Sun, Sep 27, 2020, 8:12 PM Richard Cini via cctalk <cctalk@classiccmp.org> wrote:
> Great point. Does a VT100 have a pass-through serial port? It's how printers were connected... Warner Maybe the development machine was connected to a pass through serial port > on a terminal and then sent command to the DEC-20 to send the files. So > there would have been some sort of connection from the DEC-20 to IBM. > Leased line? Packet switched? > > A great puzzle. > > > http://www.classiccmp.org/cini > Long Island S100 User’s Group > > Get Outlook<https://aka.ms/qtex0l> for iOS > > ________________________________ > From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Dennis Boone > via cctalk <cctalk@classiccmp.org> > Sent: Sunday, September 27, 2020 10:03:23 PM > To: cctalk@classiccmp.org <cctalk@classiccmp.org> > Subject: Re: SCP/Microsoft 20HAL uploader > > > Excellent! That's a great piece of info. Not sure why a TOPS-10 > > command would be embedded in a program like this. The notion of > > filtering/delay itself makes sense but that command would make sense > > only if IBM had a DECSYSYEM too, no? > > That part's a puzzler. Perhaps the link was from the PC to the MS > DEC-10 and thence out to IBM? > > De >
