add directory Minix

Minix/old/1.3/Floppies/Readme

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+This directory contains images of the 360K PC floppies which hold Minix 1.3.
+These are archive disks created by Warren Toomey, by hand-patching Minix 1.2
+with the USENET diffs for 1.3 posted by Andy Tanenbaum. As such, this is not
+an official version of Minix 1.2 from Prentice-Hall. However, it is still
+covered by the following copyright notice:
+
+	MINIX BINARIES AND SOURCES FOR 640K IBM PC'S
+	by Andrew S. Tanenbaum
+	(c) 1989 Prentice-Hall, Inc.
+
+All disks are labelled `Minix 1.3c Backup, 6th December 1988'.
+The disks are labelled as follows:
+
+Disk 01: Boot Disk (ST238R Driver)
+Disk 02: Root File Structure
+Disk 03: /usr/bin/[a-f]
+Disk 04: /usr/bin/[g-t]
+Disk 05: /usr/bin/[t-z]
+Disk 06: /usr/minix/commands/bin/[a-t]
+Disk 07: /usr/minix/commands/bin/[t-z], dis88, make, mined, /usr/doc
+Disk 08: fs, kernel
+Disk 09: /usr/tools, /usr/include, mm
+Disk 10: /usr/minix/lib, /usr/test
+Disk 11: /usr/lib, 6th August 1989
+Disk 12: /usr/local/bin, 6th August 1989
+
+Note: The image for disk 5 has a bad 512-byte block at offset 311808, which
+has been replaced with an all-zero block. I haven't booted Minix to find
+out which file is affected.