Unix v4

content/en/1970s/1971/_index.md

@@ -5,7 +5,7 @@ date: 2023-08-22T09:08:56+05:30
 draft: false
 images: [1971.webp]
 type: docs
-weight: 100000
+weight: 200000
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 {{< fig src="/1970s/1971/1971.webp" alt="! Unix v1" >}}

content/en/1970s/1971/unix-v1/index.md

@@ -5,7 +5,7 @@ date: 2023-08-22T09:08:56+05:30
 draft: false
 images: [unix-v1-2.webp]
 type: docs
-weight: 110000
+weight: 210000
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 {{< load-photoswipe >}}

content/en/1970s/1973/_index.md

@@ -19,7 +19,7 @@ There were two operating system of our interest which was released in the year 1
         <p><a class="btn btn-primary btn-lg px-4 mb-1" href="alto-os/" role="button">Alto OS</a></p>
       </div>
       <div class="col-lg-5">
-        <p><a class="btn btn-primary btn-lg px-4 mb-1" href="#" role="button">! Unix v4</a></p>
+        <p><a class="btn btn-primary btn-lg px-4 mb-1" href="unix-v4/" role="button">! Unix v4</a></p>
       </div>
     </div>
   </div>

content/en/1970s/1973/unix-v4/index.md

@@ -0,0 +1,36 @@
+---
+title: "! Unix v4"
+description: "! Unix v4 was an operating system for the DEC PDP-11 computer. It was developed by Bell Labs."
+date: 2023-12-08T09:08:56+05:30
+draft: false
+images: [unix-v4-2.webp]
+type: docs
+weight: 320000
+---
+
+{{< load-photoswipe >}}
+
+! Unix v4 was an operating system for the DEC PDP-11 computer. It was developed by Bell Labs. Sadly, we do not have a complete copy of Unix v4, but we do have a copy of a [kernel](https://en.wikipedia.org/wiki/Kernel_(operating_system)) that is from between v3 and v4. We can use that kernel with v5 [userland](https://en.wikipedia.org/wiki/User_space). It can be used on SIMH PDP-11 emulator.
+
+<section class="section section-sm">
+  <div class="container">
+    <div class="row justify-content-center text-center">
+      <div class="col-lg-5">
+        <p><a class="btn btn-primary btn-md px-4 mb-1" href="https://virtualhub.eu.org/1970s/1973/unix-v4/simh/" role="button">! Unix v4 on SIMH</a></p>
+      </div>
+    </div>
+  </div>
+</section>
+
+{{< gallery >}}
+  {{< figure src="/1970s/1973/unix-v4/unix-v4-1.webp" alt="Unix v4 Boot prompt" caption="Unix v4 Boot prompt" >}}
+  {{< figure src="/1970s/1973/unix-v4/unix-v4-2.webp" alt="Unix v4 Login prompt" caption="Unix v4 Login prompt" >}}
+  {{< figure src="/1970s/1973/unix-v4/unix-v4-3.webp" alt="Date and Time" caption="Date and Time" >}}
+  {{< figure src="/1970s/1973/unix-v4/unix-v4-4.webp" alt="List of files in /" caption="List of files in /" >}}
+  {{< figure src="/1970s/1973/unix-v4/unix-v4-5.webp" alt="List of files in /bin (1)" caption="List of files in /bin (1)" >}}
+  {{< figure src="/1970s/1973/unix-v4/unix-v4-6.webp" alt="List of files in /bin (2)" caption="List of files in /bin (2)" >}}
+  {{< figure src="/1970s/1973/unix-v4/unix-v4-7.webp" alt="List of files in /bin (3)" caption="List of files in /bin (3)" >}}
+  {{< figure src="/1970s/1973/unix-v4/unix-v4-8.webp" alt="List of files in /usr/bin (1)" caption="List of files in /usr/bin (1)" >}}
+  {{< figure src="/1970s/1973/unix-v4/unix-v4-9.webp" alt="List of files in /usr/bin (2)" caption="List of files in /usr/bin (2)" >}}
+  {{< figure src="/1970s/1973/unix-v4/unix-v4-10.webp" alt="List of files in /usr/games" caption="List of files in /usr/games" >}}
+{{< /gallery >}}

content/en/research-unix.md

@@ -11,6 +11,7 @@ To learn more about Research Unix, see [this Wikipedia page](https://en.wikipedi
 
 - [! PDP-7 Unix](/1970s/1970/pdp7unix/)
 - [! Unix v1](/1970s/1971/unix-v1/)
+- [! Unix v4](/1970s/1973/unix-v4/)
 
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