A distribution
Gregory Travis
greg at isrnix.UUCP
Fri Jul 5 06:45:38 AEST 1985
Well, I am ready to release the 'ISR' 2.9 UNIX distribution. Sorry for
the delay, I was waiting on an 11/60 to test it on a non-I/D machine.
The ISR distribution is the culmination of about 2 years of on/off
hacking on V7/2.8/2.9 UNIX kernels for PDP-11s. I have fixed many, many
bugs in the generic 2.9 kernel and have added what I believe to be
some major functional improvements. The code is offered as-is with
no warranty implied. I do believe the code to be quite stable, however
I have not been able to test it on many configurations. I have tested it
our PDP-11/44 with the following configuration:
2.5 Meg ram
2 Able DH/DM
1 DEC DZ
2 RL02's
2 RK07's
1 RM05 (SI 6100 controller)
1 Kennedy 9100 (tm11)
1 SMS FWT floppy drive (rx01/02)
And on an 11/60 with:
256k
2 RK07's
Both systems work fine.
Using this distribution we are able to comfortably support 22-28 users
on our 11/44.
Included in the distribution are:
1. A greatly reworked RL02 driver which does overlapping seeks
(as much as the hardware will allow)
2. A fixed RX01/02 driver
3. A fixed ttynew.c driver (for networking, select, etc...)
4. A fixed and operational pty driver (it's huge!) (see note below)
5. Fixed DZ and DH drivers (for emulations like ABLE's).
6. Mods to the kernel and a daemon to do tty timeouts very
gracefully.
7. Many, many improvement to user-level programs (ps, w, etc...)
8. Some debugging on the network code. I have NOT gotten it
running however. I think it would take an afternoon or two
to get it running though. I simply have no networking
need, and thus no motivation however.
Additionally, the following compilation flags are provided for the kernel:
ISR_FMAP Faster (inline) mapin/mapout.
ISR_CPASS Assembly language versions of cpass/passc.
ISR_COPY Faster version (assembly) of bcopy.
ISR_CBUF Use floating point unit (if available) for
memory/buffer clears (100% speedup)
ISR_MAPS Quick, bug-free, assembly versions of Savemap and
Restormap.
ISR_FKC Maps the kernel into user space to do buffer
copies, avoids the slow copyin/copyout routines.
ISR_SBUFS More than 2 swap buffers, speeds up swapping.
ISR_SCHED Minor scheduling mods.
ISR_CLEAR Exec only clears BSS space, since DATA is read from
disk.
ISR_NAP A 'nap' system call.
ISR_MEM Use the FKC routines when programs read from
/dev/kmem, greatly speeds up ps, w, etc...
ISR_NEWSCHED Use the new scheduler provided on the 2.9 tape.
I have implemented & debugged this for 2.9
ISR_AUTOTO Kernel mods for the tty timeout daemon.
ISR_STAT Control-T status reporting in the tty driver.
ISR_SELECT Enables the SELECT system call, even if you don't
compile the network code. This is used by Emacs and
script (to name a few).
ISR_FRAM A neat (and very fast) RAMDISK driver (if you've
got lots of memory (we mount /tmp on it))
ISR_GPC Assembly getc/putc.
ISR_ICHRS Assembly schar/uchar
ISR_WAKEUP Assembly wakeup to be used with ISR_NEWSCHED
ISR_NSRCH Assembly language directory search, speeds up
nami about 200%.
ISR_EXFIX Bug fix to exec for write-behind blocks.
ISR_RWUW Faster fu/subyte routines.
ISR_RWSEL Faster switches to read/write code.
ISR_PXREAD Code to do DMA directly to user space and bypass
the cache. Exec uses this when loading programs -
cuts system time in exec by half.
Additionally there are many bug fixes/speedups which are not
conditionally compiled.
The distribution consists of:
1. All system sources/include files.
2. Sources to all libraries (libc.a) - there have been many
bugfixes here also.
3. All of our local sources and the sources to programs which
need to be modified for our kernel.
4. Some manual pages.
I will also include a copy of our Emacs if so requested. It is almost a
full Emacs implementation, supports subshells, mlisp, process communication,
etc. If you desire a copy you must also send me, or have sent to me,
permission from James Gosling to send you the source to his Emacs.
To obtain a copy send:
A check for $45 (US) made out to "Institute of Social Research".
A copy of your 2.9 license.
A copy of your 4.1/4.2 license for the pty code and a better
disk sorting algorithm.
Permission from James Gosling to distribute Emacs to you
if you want a copy of Emacs. You may also send confirmation
directly to my electronic address.
The check covers the cost of processing, a tape and mailing.
The address is:
Gregory Travis
Institute for Social Research
Indiana University
1022 E. Third St.
Bloomington, In 47405
ATTN: ISR UNIX DIST.
My mail address is:
ihnp4!inuxc!isrnix!greg
My office phone is: (812)-335-0892 (usually in the afternoons)
I can be reached for general questions, or bug reports/fixes. Unless
the problem is immediate, please send all messages through email.
As I am the only one here who is working on this type of thing, please
keep in mind that the documentation is not quite up to snuff. I have
tried to comment everything so that it is understandable. However, I
simply do not have the time or the resources to fully document everything
I have done. It should be clear from the sources however. Therefore,
distribution may not be as 'clean' as some would like. As a metric,
I would place it between 2.8 and 2.9 (closer to 2.8) in terms of
polish. However, I wouldn't release it if I thought it would be more
trouble than it's worth.
Greg
--
Gregory R. Travis
Institute for Social Research - Indiana University - Bloomington, In
ihnp4!inuxc!isrnix!greg
{pur-ee,allegra,qusavx}!isrnix!greg
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