View source for RT-11

'''RT-11''' was an [[operating system]] for the [[PDP-11]].  Overall it has a very [[OS/8]] feel to it.

== notes ==

The [[file system]] is like that of OS/8 in that [[file]]s are stored contiguously on the [[disk]].  If a new file does not fit in a 'hole' left by an old deleted file, the files on the disk must be moved together to create a larger area of free space.
http://www.vaxdungeon.com/

INITIALIZE (format floppy)

=== Device names ===
(''n'' is the numerical designation of the drive unit)
*DL''n'': RL01 disk cartridge
*DM''n'': RK06 disk cartridge
*DP''n'': RP02 or RP03 disk
*DS''n'': RJS03/4 disk
*DT''n'': TC11 DECtape
*DX''n'': RX01 diskette
*MM''n'': TU16 magtape
*MT''n'': TU10 or TS03 magtape
*RF''n'': RF11 fixed head disk drive
*RK''n'': RK05 disk cartridge
*DD''n'': TU58 DECtape II

*DK''n'': Logical device, user drive
*SY''n'': Logical device, disk ''n'' on the boot controller

dungeon instructions & image.
http://www.geocities.com/capecanaveral/5517/pdp11.htm
console floppies http://www.headcrashers.org/comp/rx01/

== Commands ==
These are a few commands that I've managed to work out, in no particular order.

=== COPY command ===
The copy command is a little weird in how wildcards work.
<pre>
copy dx0:*.* *.*
</pre>
Is the best way to copy the disk files into the working disk.....

=== DIR command ===
Just like MS-DOS
<pre>
.DIR

SWAP  .SYS    25  01-Feb-82      RT11BL.SYS    65  01-Feb-82
RT11SJ.SYS    67  01-Feb-82      RT11FB.SYS    80  01-Feb-82
TT    .SYS     2  01-Feb-82      DT    .SYS     3  01-Feb-82
DP    .SYS     3  01-Feb-82      DX    .SYS     3  01-Feb-82
DY    .SYS     4  01-Feb-82      RF    .SYS     3  01-Feb-82
RK    .SYS     3  01-Feb-82      DL    .SYS     4  01-Feb-82
DM    .SYS     5  01-Feb-82      DS    .SYS     3  01-Feb-82
DD    .SYS     5  01-Feb-82      MT    .SYS     9  01-Feb-82
MM    .SYS     9  01-Feb-82      MS    .SYS    10  01-Feb-82
LP    .SYS     2  01-Feb-82      LS    .SYS     2  01-Feb-82
CR    .SYS     3  01-Feb-82      NL    .SYS     2  01-Feb-82
PC    .SYS     2  01-Feb-82      PD    .SYS     3  01-Feb-82
CT    .SYS     6  01-Feb-82      BA    .SYS     7  01-Feb-82
PIP   .SAV    23  01-Feb-82      DUP   .SAV    41  01-Feb-82
DIR   .SAV    17  01-Feb-82      FORMAT.SAV    19  01-Feb-82
SLP   .SAV     9  01-Feb-82      SIPP  .SAV    20  01-Feb-82
STARTS.COM     1  01-Feb-82      STARTF.COM     1  01-Feb-82
V4USER.TXT     1  01-Feb-82      CREF  .SAV     6  01-Feb-82
DUMP  .SAV     8  01-Feb-82      MBOT16.BOT     1  01-Feb-82
RESORC.SAV    15  01-Feb-82      SYSMAC.SML    42  01-Feb-82
EDIT  .SAV    19  01-Feb-82      KED   .SAV    60  01-Feb-82
K52   .SAV    55  01-Feb-82      TECO  .SAV    50  01-Feb-82
MACRO .SAV    51  01-Feb-82      MAC8K .SAV    56  01-Feb-82
LINK  .SAV    41  01-Feb-82      LIBR  .SAV    22  01-Feb-82
FILEX .SAV    18  01-Feb-82      SRCCOM.SAV    13  01-Feb-82
BINCOM.SAV    10  01-Feb-82      MTHD  .SYS     4  01-Feb-82
MMHD  .SYS     4  01-Feb-82      MSHD  .SYS     5  01-Feb-82
PATCH .SAV    10  01-Feb-82      PAT   .SAV     8  01-Feb-82
HELP  .SAV   107  01-Feb-82      HELP  .EXE     7  01-Feb-82
HELP  .MLB    98  01-Feb-82      ERROUT.SAV    17  01-Feb-82
SYSGEN.SAV    39  01-Feb-82      SYSGEN.CND   134  01-Feb-82
SYSTBL.CND    23  01-Feb-82      DSAVE .DAT    10    -BAD-
BATCH .SAV    26  01-Feb-82      QUEMAN.SAV    13  01-Feb-82
QUEUE .REL    14  01-Feb-82      SYSLIB.OBJ    47  01-Feb-82
MDUP  .SAV    18  01-Feb-82      MDUP  .MM     48  01-Feb-82
MDUP  .MT     48  01-Feb-82      MDUP  .MS     48  01-Feb-82
MBOOT .BOT     1  01-Feb-82      MSBOOT.BOT     3  01-Feb-82
DEMOF1.FOR     2  01-Feb-82      DEMOED.TXT     1  01-Feb-82
README.TXT    36  01-Feb-82      VT52  .TEC     5  01-Feb-82
VEG   .TEC     4  01-Feb-82      EDIT  .TEC     1  01-Feb-82
INSERT.TEC     2  01-Feb-82      LOCAL .TEC     3  01-Feb-82
SORT  .TEC     3  01-Feb-82      VTEDIT.TEC    32  01-Feb-82
TECO  .TC     23  01-Feb-82      SEARCH.TEC     3  01-Feb-82
SQU   .TEC    13  01-Feb-82      TYPE  .TEC    12  01-Feb-82
TECO  .INI    15  01-Feb-82      ODT   .OBJ     9  01-Feb-82
VDT   .OBJ     9  01-Feb-82      VTHDLR.OBJ     9  01-Feb-82
PLOT55.OBJ     3  01-Feb-82      TEST55.FOR     5  01-Feb-82
GETSTR.FOR     2  01-Feb-82      PUTSTR.FOR     2  01-Feb-82
DINDX .DAT    20    -BAD-        DUNGEO.SAV   216    -BAD-
SPEED .SAV     4  01-Feb-82      SYCND .BL      3  01-Feb-82
SYSTBL.BL      4  01-Feb-82      SYCND .DIS     5  01-Feb-82
SYCND .HD      5  01-Feb-82      SYSTBL.DIS     4  01-Feb-82
RTBL  .MAP    16  01-Feb-82      RTSJ  .MAP    16  01-Feb-82
RTFB  .MAP    23  01-Feb-82      DISMT1.COM     9  01-Feb-82
DISMT2.COM     8  01-Feb-82      DTEXT .DAT   383    -BAD-
 110 Files, 2571 Blocks
 2191 Free blocks
</pre>

=== type command ===
The type command will show the contents of a file, just like MS-DOS.
<pre>
.TYPE STARTS.COM
D 56=5015
TYPE V4USER.TXT
D 56=0
</pre>

=== RUN command ===
Dungeon for example is executed with RUN.  I think you have to run .sav files.
<pre>
.RUN DUNGEO
Welcome to Dungeon.                     This version created 10-AUG-78.
You are in an open field west of a big white house with a boarded
front door.
There is a small mailbox here.
>
</pre>

=== @ command ===
COM files are like batch scripts, and are executed with the @ infront of them.
<pre>
.@STARTS.COM

.D 56=5015

.TYPE V4USER.TXT
Welcome to RT-11 Version 4. RT-11 V04 provides new hardware support
and some major enhancements over Version 3B.

Please use the HELP command;  it describes the new options in many
of the utilities.

If you are using a terminal that requires fill characters,
modify location 56 with a Deposit command before proceeding
with system installation. LA36 DECwriter II and VT52 DECscope
terminals do NOT require such modification.
</pre>

=== SQUEEZE command ===
Disks will need to be 'defraged' or compacted with this command.  In some version it'll just be SQU.
<pre>
.SQU
Device? RK0:
RK0:/Squeeze; Are you sure? Y
</pre>

=== SHOW command ===
This is a very usefull command to show some info about the OS.
<pre>
.SHOW
TT
RK  (Resident)
    RK0 = SY , DK
BA
PC
NL
LP
MS
MT
DM
DL
DX
DP
4 free slots
</pre>

show configuration

== Tutorials ==
You may find the following of interest:
*[[Installing RT-11 5.3 on SIMH]]
*[[Installing FORTRAN v2 on RT-11]]

==External link==
*[http://www.skrenta.com/pdpbook.txt THE PDP-11 HOW-TO BOOK]

{{semi-stub}}

[[Category: PDP-11 Operating Systems]]
[[Category: DEC Operating Systems]]