Added more disk images for the PDP-11

disks/dec/rk03/unixv5/README.md

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+---
+layout: page
+title: "RK03 Unix v5 Disk"
+permalink: /disks/dec/rk03/unixv5/
+---
+
+RK03 Unix v5 Disk
+-----------------
+
+### Boot
+
+To boot the RK03 "Unix v5" disk, start a [PDP-11/70](/devices/pdp11/machine/1170/panel/debugger/) with an
+[RK11 Disk Controller](/devices/pdp11/rk11/), select the "Unix v5" disk from the list of disks
+available for drive "RK0", click **Load**, and wait for the message:
+
+	Mounted disk "Unix v5" in drive RK0
+
+Then start the machine (click **Run**) and make sure the following prompt has been displayed:
+
+	PDP-11 MONITOR V1.0
+
+	BOOT>
+
+At the prompt, type "BOOT RK0".  Then type "unix" at the "@" prompt, followed by "root" for the login:
+
+	@unix
+	
+	<ESC>;<BEL>login: root
+	# ls -l
+	total 60
+	drwxr-xr-x  2 bin       944 Nov 26 18:13 bin
+	drwxr-xr-x  2 bin        80 Nov 26 18:13 dev
+	drwxr-xr-x  2 bin       240 Mar 21 12:07 etc
+	drwxr-xr-x  2 bin       224 Nov 26 18:13 lib
+	drwxr-xr-x  2 bin        32 Nov 26 18:13 mnt
+	drwxrwxrwx  2 bin        32 Nov 26 18:13 tmp
+	-rwxrwxrwx  1 bin     25802 Mar 21 12:07 unix
+	drwxr-xr-x 14 bin       224 Nov 26 18:13 usr
+	#