DEC TOPS20

Feb 13, 2025 Last reply: 1 year ago 8 Replies

I got a geekpi and I want to run TOPS20.



Can I just use putty/ssh with a USB-USB cable as a terminal?



I eventually want to use 1980s peripherals like HP2621a terminal and OKI82a printer and even a v90 modem. All have RS232 DB25 except printer which is centronix


SSH works over a network connection, not a serial line.

I believe Windows Putty has provision for serial connections.

You should be able to attach multiple serial ports via USB. Not sure if there are adapters for parallel ports.

Plus of course SIMH has provisions for faking these connections virtually.

Ok, I need to install SIMH. THat's were I need help.

How does it know about ARM chips?

It seems I load the OS into a micro-SD (TF) card.

WHat do I load?

The SIMH packages are a standard part of Debian, compiled for all the architectures it supports. They will be available in your ARM Debian (Raspberry Pi OS, is it officially called?).

You should find ready-bootable images, and instructions, at the Raspberry Pi site.

Ok, kinda geeting there..

Are you saying SIMH already came with RasPi OS?

-- Vasos Panagiotopoulos panix.com/~vjp2/vasos.htm ---{Nothing herein constitutes advice. Everything fully disclaimed.}---

You do know how to install software from the OS repos?

i.e. sudo apt install simh

Yup. Linux distros typically come with thousands of packages ready to install from their standard repos. And Debian (which Raspberry Pi OS is an offshoot of) is one of the more well-supplied ones.

Integrated package management on Linux distros takes care of automatically bringing in any necessary dependencies, as well. And you can keep everything up-to-date with the latest available versions with just one or two commands.

One snag is I download from the library, no broadband at home (using plain text unix dialup right now).

Short of taking RasPi with me to library, how can I download the components (and most Unix stuff has dependencies..)

(Dang, I still wish there was a site which combined all dependencies!)

I think this might be it:

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