Running UNIX v6 in SIMH - Revision history

Jnc: Avoid redir, add some links

2025-04-18T16:38:27Z

Avoid redir, add some links

Jnc: /* See also */ +1

2021-05-19T19:16:47Z

‎See also: +1

Jnc: +See also

2021-05-19T18:46:08Z

+See also

Jnc: Jnc moved page Running Unix v6 in SIMH to Running UNIX v6 in SIMH

2021-03-10T17:04:42Z

Jnc moved page Running Unix v6 in SIMH to Running UNIX v6 in SIMH

Jnc: +cat

2020-09-24T12:49:16Z

+cat

Jnc: /* Installing Unix V6 */ link a few useful things

2016-12-26T17:11:19Z

‎Installing Unix V6: link a few useful things

Neozeed at 13:43, 18 August 2009

2009-08-18T13:43:18Z

Neozeed: taken from http://wwwlehre.ba-stuttgart.de/~helbig/os/script/chapt1.1

2009-02-11T22:12:21Z

taken from http://wwwlehre.ba-stuttgart.de/~helbig/os/script/chapt1.1

New page

The following was taken from http://wwwlehre.ba-stuttgart.de/~helbig/os/script/chapt1.1

I need to verify it still works, and include some configuration notes..

== Installing Unix V6 ==
The program product was the last one assembled manually. Unix was used
to develop Unix so we'll use Unix to study Unix. For this, you first
need to install a bootable binary disk from the distribution tape. The
paper "SETTING UP UNIX-Sixth Edition" (filed in v6/doc/start.ps)
explains usage of the secondary boot program. Use it to load "tmrk".
"tmrk" copies blocks from tape to disk. You can use ltap as the
primary boot program, which loads the secondary boot from the
distribution tape. Before booting Unix from disk, set the SR to
173030. This will boot into single user mode, which is enough right
now. After all, we only have a single terminal.

SIMH: A version of the distribution tape suitable for SIMH is filed
at v6/dist.tap.

SIMH: Use "boot rk0" to load the first block from disk. You don't need
to key in a primary boot program to boot from disk.

SIMH: Use "set tto 7b" to set the output to seven bits per character.
The SIMH setting defaults to eight bits per character and doesn't
work, because the TTY driver sets bit 7 to a parity bit.

The shell prompts you with "#" to enter commands. To use unix, you need
to read the "Unix Programmer's Manual", see v6/doc/index.html.

The TTY driver assumes an upper case only console. Use "stty -lcase" to
teach it better. Another source of confusion might be the "change
directory" command, which reads "chdir" in Unix V6 and not "cd" as in
its successors.

Notation: foo(number) references the manual page "foo" in man.number.ps
For example stty(I), tty(IV) and chdir(I). The manual pages are provided
as html pages as well, e. g., you find the stty page at
v6/doc/I/stty.html

You want to verify the installation by running two file system checks,
namely icheck(VIII) and dcheck(VIII). Icheck checks that every block
in a filesystem is either allocated to exactly one file or on the list
of free blocks. Dcheck verifies that every file has at least one
name, i.e., an entry in a directory, and that the number of names of
a file equals the link count stored with the file.

Icheck and dcheck require a device name argument. Device names are
directory entries much like names of regular files. They bind a name to
a device, i.e., memory, terminal, tape or disk. Unlike regular file
names, device names are created with mknod(VIII). It takes four
arguments: the name of the device, conventionally an entry in the /dev
directory; the type of the device (c for character, b for block); a
major number, which identifies the device driver, and a minor number,
which identifies one of the eight possibly attached disk drives.

Device files are called "special files" as opposed to "regular files".

The major number is an index to the driver's entry in either the
"character device switch" (cdevsw) or the "block device switch"
(bdevsw). Both tables are written into the file /usr/sys/conf/c.c by a
program called "mkconf". "Mkconf" itself is distributed as a source
file /usr/sys/conf/mkconf.c. For the commands needed to build mkconf
and c.c, consult the shell script "/usr/sys/run". It configures and
builds the distribution kernels for a variety of hardware
configurations.

Besides c.c, mkconf creates the assembler program l.s, which defines
the low memory part of the kernel, namely the trap and interrupt
vectors, which is the yellow area. In other words, mkconf selects the
drivers and creates the corresponding interrupt vectors as needed by a
particular hardware configuration. When the kernel is linked, only
drivers that are referred to in c.c, will be included.

You only need to specify rk and tm to mkconf. Other devices, like the
console driver or the memory, are included automatically by mkconf.

Here is a typescript that creates mkconf, c.c and l.s:
<pre>
# chdir /usr/sys/conf
# cc mkconf.c
# mv a.out mkconf
# mkconf
rk
tm
done
#
</pre>

From the c.c file we learn the assignement of major numbers to drivers:
block devices rk=0, tm=3,
character devices: kl=0, mem=8, rk=9, tm=12

You are now ready to name the rk0 character device. Since character
device in this case means the kernel does not do any "blocking", the
name traditionally starts with an extra "r" for raw device.

The typescript continued:
<pre>
# /etc/mknod /dev/rrk0 c 9 0
</pre>

And finally the filesystem checks:
<pre>
# icheck /dev/rrk0
/dev/rrk0:
spcl 5
files 292
large 95
direc 24
indir 95
used 2902
free 1011
# dcheck /dev/rrk0
/dev/rrk0:
</pre>

If your output looks similar to the above, you are ready for the completion
of the installation:

Create block and character device names for rk1 and tm0. The names of the
tape device files are "/dev/mt0" and "/dev/rmt0", not "/dev/tm0".

Copy the source disk (blocks [4100, 8100) on tape) to /dev/rrk1.
To copy blocks, use dd(I):
dd if=/dev/rmt0 of=/dev/rrk1 skip=4100 count=4000

SIMH: Remember to attach rk1 before running the dd command.

Now you are ready to mount(VII) the file system:
/etc/mount /dev/rk1 /usr/source

Note that /etc/mount wants you to specifiy a block device.

[[Category:Tutorials]]

@@ Line 129: / Line 129: @@
 * [[UNIX V6 internals]]
-* [[UNIX V6 kernel memory layout]]
+** [[UNIX V6 kernel memory layout]]
 ** [[UNIX V6 dump analysis]]
-* [[Setting up UNIX Sixth Edition]]
+* [[Installing UNIX Sixth Edition]]
 ** [[Upgrading UNIX Sixth Edition]]
 ** [[Running UNIX V6 on an -11/23]]

@@ Line 125: / Line 125: @@
 Note that /etc/mount wants you to specifiy a block device.
 [[Category: SIMH Tutorials]]
 [[Category: UNIX Practical Guides]]

← Older revision		Revision as of 12:49, 24 September 2020
Line 126:		Line 126:
	Note that /etc/mount wants you to specifiy a block device.		Note that /etc/mount wants you to specifiy a block device.

−	[[Category:SIMH Tutorials]]	+	[[Category: SIMH Tutorials]]
		+	[[Category: UNIX Practical Guides]]

← Older revision		Revision as of 13:43, 18 August 2009
Line 133:		Line 133:


−	[[Category:Tutorials]]	+	[[Category:SIMH Tutorials]]

@@ Line 4: / Line 4: @@
 == Installing Unix V6 ==
-The program product was the last one assembled manually. [[Unix]] was used
+The program product was the last one assembled manually. [[UNIX]] was used
-to develop Unix so we'll use Unix to study Unix. For this, you first need to install a bootable binary disk from the distribution tape.
+to develop UNIX so we'll use UNIX to study UNIX. For this, you first need to install a bootable binary disk from the distribution tape.
-The paper [[Setting up UNIX - Sixth Edition]] explains usage of the secondary boot program. (See [[Installing UNIX Sixth Edition]] for details on what is actually happening here.) Use it to load "tmrk". "tmrk" copies blocks from tape to disk. You can use ltap as the primary boot program, which loads the secondary boot from the distribution tape. Before booting Unix from disk, set the SR to 173030. This will boot into single user mode, which is enough right now. After all, we only have a single terminal.
+The paper [[Setting up UNIX - Sixth Edition]] explains usage of the secondary boot program. (See [[Installing UNIX Sixth Edition]] for details on what is actually happening here.) Use it to load "tmrk". "tmrk" copies blocks from tape to disk. You can use ltap as the primary boot program, which loads the secondary boot from the distribution tape. Before booting UNIX from disk, set the SR to 173030. This will boot into single user mode, which is enough right now. After all, we only have a single terminal.
 SIMH: A version of the distribution tape suitable for SIMH is filed
@@ Line 19: / Line 19: @@
 work, because the TTY driver sets bit 7 to a parity bit.
-The shell prompts you with "#" to enter commands. To use unix, you need
+The shell prompts you with "#" to enter commands. To use UNIX, you need
-to read the "Unix Programmer's Manual", see v6/doc/index.html.
+to read the "UNIX Programmer's Manual", see v6/doc/index.html.
 The TTY driver assumes an upper case only console. Use "stty -lcase" to
 teach it better. Another source of confusion might be the "change
-directory" command, which reads "chdir" in Unix V6 and not "cd" as in
+directory" command, which reads "chdir" in UNIX V6 and not "cd" as in
 its successors.
@@ Line 32: / Line 32: @@
 	v6/doc/I/stty.html
-You want to verify the installation by running two file system checks,
+You want to verify the installation by running two [[file system]] checks,
 namely icheck(VIII) and dcheck(VIII).  Icheck checks that every block
-in a filesystem is either allocated to exactly one file or on the list
+in a file system is either allocated to exactly one [[file]] or on the list
 of free blocks.  Dcheck verifies that every file has at least one
-name, i.e., an entry in a directory, and that the number of names of
+name, i.e., an entry in a [[directory]], and that the number of names of
 a file equals the link count stored with the file.
@@ Line 45: / Line 45: @@
 arguments: the name of the device, conventionally an entry in the /dev
 directory; the type of the device (c for character, b for block); a
-major number, which identifies the device driver, and a minor number,
+major number, which identifies the [[device driver]], and a minor number,
-which identifies one of the eight possibly attached disk drives.
+which identifies one of the possibly attached ([[disk]]) drives (usually up to eight).
 Device files are called "special files" as opposed to "regular files".
@@ Line 124: / Line 124: @@
 	/etc/mount /dev/rk1 /usr/source
-Note that /etc/mount wants you to specifiy a block device.
+Note that /etc/mount wants you to specify a block device.
 ==See also==
 * [[UNIX V6 internals]]
 ** [[UNIX V6 kernel memory layout]]

← Older revision	Revision as of 17:04, 10 March 2021
(No difference)