New Information for all users . . . . . . . . . . 1
Information for RT-11, Version 4 Users . . . . . 2
Information for RSTS Users . . . . . . . . . . . 3
NEW INFORMATION
This tape continues the traditions perfected over the past
few SIG tapes. There are no new instructions to users in this
file.
IMPORTANT INFORMATION
Files on this tape have been named in deference to VMS Ver-
sion 4 sites who have had trouble with three-character .DSK
files. Additionally, the annotated tape directory file TAPE.DIR
has been renamed to TAPDIR.TXT to avoid making VMS think it is a
subdirectory.
This tape continues the Fall, 1985, SIG tape experiment to
improve information retrievability. We have included an index
and a summary at the end of the file TAPDIR.TXT which references
every submission, every author or submitter, and any key words or
phrases which might help someone locate a submission. If you
find this of use, or have suggestions for improvement, please
contact R. W. Barnard with your comments.
The XD subdevice files are no longer included on the tape.
If anyone needs that capability, previous tapes have the XD
stuff, and the section on the following page explains how to
recover files from within subdevices without the LD handler.
Now that RT-11 Version 5 has the LD (logical disk) handler,
files may be easily broken down after they have been copied from
the SIG tape. This is done by typing the KMON command
MOUNT LDn FILE.DSK.
Files within the subdevice FILE.DSK can then be copied.
Directory listings are no longer included in the file
TAPDIR.TXT. At the end of each submission description, the
number of files and their sizes for each subdevice in the submis-
sion is given. The sizes of the actual subdevice files (which
are generally 8 blocks larger to include the directory), can be
determined from the RT-11 directory of the whole tape. Wherever
possible, subdevices have been created with only one directory
segment to reduce the size.
Page 2
RT VERSION 4 INFORMATION
If you are using RT-11, Version 4, you will need to use the
subdevice handler XD, or any other subdevice handler you may
have. There are two ways to pull files from this tape. The tape
has been built so that each .DSK subdevice file submission is no
larger than a single density floppy. (Certain individual files
may be larger than 494 blocks). The first way to pull off a sub-
mission is as follows:
COPY/DEV/FILE MT:XXXXXX.DSK DX:
The above command will transfer the submission XXXXXX.DSK from
the magnetic tape and place it on a single-density floppy. The
floppy will have a regular RT-11 directory and will be usable as
an RT-11 device. Note that if the subdevice file was smaller
than 494 blocks, the floppy capacity will also appear to be less
than 486 blocks.
If you do not have floppies, or you want to take advantage
of the virtual-device system, do the following:
First of all you need to copy the virtual-device file from the
magnetic tape to a working disk using PIP.
COPY MT:XXXXXX.DSK DK:
Then attach the subdevice handler XD to the file using the pro-
gram XDATCH.
R XDATCH
*XXXXXX=XD0:
*^C
The virtual-device XD0: is now attached and can be accessed as a
disk device using regular RT-11 commands like DIR. DIR XD: will
list a directory of the virtual-device.
Page 3
RSTS/E USERS
The file VIRTUL.BAS on this tape (a submission of E. F.
Beadel, SUNY at Oswego, Oswego, NY), will allow subdevice files
to be read by RSTS systems. Needless to say, it is not located
in a subdevice file. It can be used to break down RT-11 subdev-
ice files after they have been copied from tape to disk. There
is a description and instruction section at the beginning of the
VIRTUL.BAS file.
If RSTS users have any trouble or questions about the usage
of this file, please direct your questions to Mr. Beadel.
David Smith, of Galileo Computer Center, San Francisco, CA,
has used and modified the VIRTUL program. He has included a few
bug fixes and made it possible to now read multi-segment directo-
ries. If users have any questions or problems regarding the new
VIRTUL, please contact Mr. Smith.