SCP/Microsoft 20HAL uploader

[Warner Losh]

On Sun, Sep 27, 2020, 8:12 PM Richard Cini via cctalk <cctalk at 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-bounces at classiccmp.org> on behalf of Dennis Boone
> via cctalk <cctalk at classiccmp.org>
> Sent: Sunday, September 27, 2020 10:03:23 PM
> To: cctalk at classiccmp.org <cctalk at 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
>