Making use of Panda dist TOPS20

Bob Smith bobsmithofd at
Tue Feb 11 08:57:36 CST 2020

you don't say which emulator you are using (specifically) for TOPS20
Panda does run very well on the KLH10 from Ken H.

The set up for KLH10 emulator has details on how to set up the NI 20
address, mask etc, there is additional info on how to set up tun/tap
with the virtual interface. There are a couple of sources and write
ups on how to do this.

There is data in the INI file, KLT20.ini will look like this:


; Define basic device config - one DTE, one disk, one tape
devdef dte0 200   dte master
devdef rh0  540   rh20
devdef rh1  544   rh20
devdef dsk0 rh0.0 rp type=rp07 format=dbd9
devdef mta0 rh1.0 tm03 type=tu45
; Set Ethernet address
devdef ni0 564 ni20 ipaddr=<< this is the out of the box set
up. You probably need to set up your address and a virtual gw to
connect from external systems into the TOPS host.
; Define the idle device on 700
devdef idler 700 host

; Set switch register

set sw=254200,,147

; Set console lights I/O base register

;Uncomment the following line if you have a Panda display.

;lights 378

; Load disk bootstrap directly

load boot.sav

; Ready to GO

To access the system using  external system, you have to set up and
enable Telnet on your linux host,.
I hope this helps.

On Tue, Feb 11, 2020 at 1:40 AM Ethan Dicks via cctalk
<cctalk at> wrote:
> On Tue, Feb 11, 2020 at 1:12 AM David Griffith via cctalk
> <cctalk at> wrote:
> > I'm trying to wrap my head around getting Mark Crispin's Panda
> > Distribution of TOPS20 set up such that I can actually make use of a
> > TOPS20 environment.
> >
> > 1) How do I get networking set up, preferably such that it'll work on a
> > host that's given a DHCP address that could vary?  I'd like to be able to
> > ssh to a specific port and then be connected to a terminal on the emulated
> > machine.
> I last did it back in 2003, but I remember having to plug a real DEC
> terminal into a serial port on my Linux box so I could run emacs so I
> could edit some local files.  Just using the xterm window wasn't
> VT100/ANSI-compatible enough to run emacs without odd formatting
> problems.
> I totally do not remember exactly what I did, but it was the standard
> recipe for setting up TCP/IP with a static address on TOPS-20,
> pointing it to the IP address of a physical interface on the box (I
> might have had multiple interfaces to simplify things).
> -ethan
> > 2) How do I set or alter a regular user's disk quota?
> >
> > --
> > David Griffith
> > dave at
> >
> > A: Because it fouls the order in which people normally read text.
> > Q: Why is top-posting such a bad thing?
> > A: Top-posting.
> > Q: What is the most annoying thing in e-mail?

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