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125 lines
4.0 KiB
Markdown
125 lines
4.0 KiB
Markdown
---
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keywords: ["Unix", "Unix v1", "PDP-11", SIMH, 1970s, 1971]
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image: ./unix-v1-SIMH-4.webp
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description: "Sadly, we do not have a complete copy of ! Unix v1, but we do have a copy with v1 kernel and v2 userland, which we can run on SIMH."
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sidebar_position: 1
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sidebar_label: "! Unix v1 on SIMH"
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---
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# How to install ! Unix v1 on SIMH?
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Sadly, we do not have a complete copy of [! Unix v1](/1970s/1971/unix-v1), but we do have a copy with v1 kernel and v2 userland, which we can run on SIMH. We will refer to that copy as Unix v1 from now on. First, we need to download the ! Unix-v1 kit.
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## Downloads
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You can download the kit needed to run ! Unix-v1 on the SIMH PDP-11 emulator from the [Google Code archive of the project which recreated the image](https://code.google.com/archive/p/unix-jun72/):
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- [! Unix-v1 kit](https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/unix-jun72/images-20080625.tgz)
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If you are on Windows, you may need to install additional software such as [7-Zip](https://www.7-zip.org/) to extract the kit.
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## Using ! Unix-v1
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:::tip
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If you have not already installed SIMH PDP-11 emulator, see [the VirtualHub Setup tutorial on how to do so](https://setup.virtualhub.eu.org/simh-pdp11/) on Linux and Windows.
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:::
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Extract the kit you downloaded. Inside you will find several files. Create a folder somewhere to store the files for this VM and move the files named `m792low.load`, `rf0.dsk`, `rk0.dsk` and `tape` into it.
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Now we will create a config file for our VM. Create a text file called `pdp11.ini` with the following content in the VM folder:
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```ini
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set cpu 11/20
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set cpu 32K
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set rk0 enabled
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att rk0 rk0.dsk
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set rf 2p
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set rf enabled
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att rf rf0.dsk
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set tc enabled
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att tc tape
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set hk disabled
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set tm disabled
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set rx disabled
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set rl disabled
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set tq disabled
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set tc enabled
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set rf enabled
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set ke enabled
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set dci en
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set dci lines=8
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set dco 7b
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load m792low.load
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dep system sr 173700
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go 73700
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```
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Now open a terminal and move to the VM folder. Run the following command to start the emulator:
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```bash
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pdp11
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```
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After the emulator starts, you will be asked to log in. Type `root` and press enter to log in. There is no password.
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You can now run `ls` to see the list of files. To change directory, you need to use the `chdir` command, `cd` is not available.
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:::tip
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You can also login using a non-admin user `ken`. You can run `chdir /` to move to `/` and then run `ls` to see list of files and folders in `/`.
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:::
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That's it! We used ! Unix-v1. We can create a shell script to make it easy to launch the VM.
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### Linux
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Create a file called `unix-v1.sh` with the following content:
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```bash
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#!/bin/bash
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pdp11
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```
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Now make the file executable:
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```bash
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chmod +x unix-v1.sh
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```
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Now you can start the VM using the shell script. For example, on KDE you can right-click the file and choose `Run in Konsole` or on GNOME, where you can right-click the file and choose `Run as executable`. The VM will start.
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See the [manuals section](/1970s/1971/unix-v1/#manuals) on the [main ! Unix-v1 page](/1970s/1971/unix-v1) to learn how to use it.
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### Windows
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Create a file called `unix-v1.bat` with the following content:
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```bash
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pdp11
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```
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Now you can start the VM by double-clicking the shell script. See the [manuals section](/1970s/1971/unix-v1/#manuals) on the [main ! Unix-v1 page](/1970s/1971/unix-v1) to learn how to use it.
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## Credits
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- The disk image and other files used above are from a kit available on the [Google Code archive of the project which recreated the image](https://code.google.com/archive/p/unix-jun72/).
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## Video tutorial
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Do you want to follow the tutorial by watching a video? We will post a video on our [YouTube channel](https://www.youtube.com/@virtua1hub) soon.
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Archives of this tutorial are available on [Wayback Machine](https://web.archive.org/web/*/https://virtualhub.eu.org/1970s/1971/unix-v1/simh/).
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