30 Jan
2005
30 Jan
'05
6:35 a.m.
So I'm in the process of pulling a bunch of files off of some RX02 disks
to get them onto a PC.
So far (thanks to help from Howard Harte) I've got an 11/44 with an RX02
drive running RSTS that has the DD module loaded. I'm running the serial
tape drive simulator on a PC (I forget what it's called or who wrote it).
So I can do:
COPY DY1:*.* DD0:
Which then copies all the files off of the disk into an image file on my
PC. Works very nicely, albeit slowly (only 9600bps transfer rate).
Is there a better way to do this? I've seen various postings of people
getting RX02 drives connected to Linux boxen. How so? Has anyone done
this?
I also found this:
http://www.chd.dyndns.org/rx02/
This is very cool. It's an RX02 simluator (hardware/software) that makes
your PDP11 think your PC is an RX02 drive. It would be great if I could
read the files from a real RX02 and then dump them into the emulated RX02.
Can a PDP11 have two sets of RX02 drives installed at once? If so, do the
second set of drives become DY2: and DY3:?
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
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30 Jan
30 Jan
7:49 a.m.
So I'm in the process of pulling a bunch of files
off of some RX02 disks
to get them onto a PC.
So far (thanks to help from Howard Harte) I've got an 11/44 with an RX02
drive running RSTS that has the DD module loaded. I'm running the serial
tape drive simulator on a PC (I forget what it's called or who wrote it).
So I can do:
COPY DY1:*.* DD0:
Which then copies all the files off of the disk into an image file on my
PC. Works very nicely, albeit slowly (only 9600bps transfer rate).
Is there a better way to do this? I've seen various postings of people
getting RX02 drives connected to Linux boxen. How so? Has anyone done
this?
Although still limited by the 9600 bps transfer rate, I use a program
called VTServer to get disk images from my PDP-11 to my PC. It runs on
my PC, sends an Ultrix image to the PDP-11 and boots in Ultrix. Then
you can use the Ultrix COPY command to copy images from any disk or tape
device on the PDP-11 to a file on the PC. You can also do the reverse,
copy disk image files from the PC to a physical disk on the PDP-11. I've
done both and it works fine as long as the disk on the PDP-11 doesn't
have bad blocks on it. I don't know all the inner workings of VTServer,
I just run it and it works for me. If I've made any mis-statements
about the way it works, someone with more detailed knowledge on its
innards can give a better explanation. I think basically it allows the
PC to function as "Virtual Tape" drive on the PDP-11.
I have recently copied 20+ RK05 disk images, 6 or 8 RL01 images, and
a few RL02 images from actual disks on the PDP-11 to image files on
my PC. These disk image files can be used on the simh simulator as
if they were the actual disks. I've also done the reverse. I SYSGENed
a RSTS/E v7.0 system on simh and copied it to RL02 packs on the
PDP-11. It's faster to SYSGEN a system on simh than it is to do it
on the real hardware.
Other folks have told me that a better way to get files from the -11
to a PC is to install a 9-track tape drive on the -11 and another
9-track drive on your PC. This is much faster. The problem is that
I don't have any 9-track tape drives right now, so that's not an option
for me.
Ashley
31 Jan
31 Jan
4:16 a.m.
>>>> "Ashley" == Ashley Carder
<wacarder(a)usit.net> writes:
> So I'm in the process of pulling a bunch of
files off of some RX02
> disks to get them onto a PC.
Ashley> Other folks have told me that a better
way to get files from
Ashley> the -11 to a PC is to install a 9-track tape drive on the -11
Ashley> and another 9-track drive on your PC. This is much faster.
Ashley> The problem is that I don't have any 9-track tape drives
Ashley> right now, so that's not an option for me.
Ethernet works too, if your PDP11 OS is a recent enough version to
support DECnet Phase IV. If so, you can use NFT to copy files, either
to another copy of that OS running in emulation, or to DECnet/Linux.
paul
4:29 a.m.
> So I'm
in the process of pulling a bunch of files off of some RX02
> disks to get them onto a PC.
Ashley> Other folks have told me that a
better way to get files from
Ashley> the -11 to a PC is to install a 9-track tape drive on the -11
Ashley> and another 9-track drive on your PC. This is much faster.
Ashley> The problem is that I don't have any 9-track tape drives
Ashley> right now, so that's not an option for me.
Ethernet works too, if your PDP11 OS is a recent enough version to
support DECnet Phase IV. If so, you can use NFT to copy files, either
to another copy of that OS running in emulation, or to DECnet/Linux.
paul 
30 Jan
30 Jan
10:48 a.m.
Vintage Computer Festival wrote:
So I'm in the process of pulling a bunch of files
off of some RX02 disks
to get them onto a PC.
So far (thanks to help from Howard Harte) I've got an 11/44 with an RX02
drive running RSTS that has the DD module loaded. I'm running the serial
tape drive simulator on a PC (I forget what it's called or who wrote it).
So I can do:
COPY DY1:*.* DD0:
Which then copies all the files off of the disk into an image file on my
PC. Works very nicely, albeit slowly (only 9600bps transfer rate).
Is there a better way to do this? I've seen various postings of people
getting RX02 drives connected to Linux boxen. How so? Has anyone done
this?
I also found this:
http://www.chd.dyndns.org/rx02/
This is very cool. It's an RX02 simluator (hardware/software) that makes
your PDP11 think your PC is an RX02 drive. It would be great if I could
read the files from a real RX02 and then dump them into the emulated RX02.
Jerome Fine replies:
I am fortunate enough to have a SCSI host adapter connected to
a Sony SMO S-501 on the real DEC PDP-11. On the PC,
I have an Adaptec AHA-2940AU host adapter with a separate
Sony SMO S-501. Thus, any files on either system can be copied
to the SMO media and then read on the other system.
Once the media is on the PC, then the PUTR program from
John Wilson is easily able to read the file on the SMO media
and transfer the file to the directory on the PC, although I admit
that I have used PUTR only under Windows 95 and 98 SE.
Of course, I doubt this really answers your question since it
seems like you really want to easily be able to read RX02 media
directly on the PC.
Can a PDP11 have two sets of RX02 drives installed at
once? If so, do the
second set of drives become DY2: and DY3:?
Under RT-11, it is trivial to perform a SYSGEN
which allows DY2: and DY3:, although you also
must realize that the RX02 controller ONLY supports
18 bit addresses. Of course, the RT-11 operating
system can support the full 4 MByte address space
if there is extra code to support a bounce buffer
within the DYX.SYS device driver.
In addition, it is possible for both a real PDP-11
and an emulator to easily support up to 4 RX02
controllers for a total of 8 DY drives (DY0: => DY7:).
But I don't think that I have ever seen a real PDP-11
system with more than 2 dual RX02 drives. AND as far
as I know, neither emulator for the PDP-11 allows
more than 2 RX02 controllers. BUT, if it was
really important, I am sure that could easily
be changed.
There were also a few third party controllers
that supported hardware 22-bit addresses, but DEC
never bothered to allow this hardware. DECUS
has RT-11 device drivers for RT-11 to support
many of the third party RX02 controllers for
RT-11 which have 22-bit hardware. In addition,
I know where it is possible to find a version
of DYX.SYS which supports a bounce buffer so
that 22 bit user buffers are allowed under RT-11
with only 18 bit hardware for the RX02 controller,
both real DEC RX02 and emulated.
Sincerely yours,
Jerome Fine
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1:51 p.m.
On Sun, 2005-01-30 at 09:35 -0800, Vintage Computer Festival wrote:
So I'm in the process of pulling a bunch of files
off of some RX02 disks
to get them onto a PC.
So far (thanks to help from Howard Harte) I've got an 11/44 with an RX02
drive running RSTS that has the DD module loaded. I'm running the serial
tape drive simulator on a PC (I forget what it's called or who wrote it).
So I can do:
COPY DY1:*.* DD0:
Which then copies all the files off of the disk into an image file on my
PC. Works very nicely, albeit slowly (only 9600bps transfer rate).
Is there a better way to do this? I've seen various postings of people
getting RX02 drives connected to Linux boxen. How so? Has anyone done
this?
On my 11/45 running v7 unix, I "dd" the floppies I want into the
appropriate files on one of the disks and then use "tar" to write them
onto a 9-track tape. I then sneakernet the 9-track tape over to a PC
that has a SCSI 9-track tape drive and read them off. It turns out to
be *much* faster than serial.
It works *very* well and I use it in both directions...if there's an
image that I want to get from the net onto "real" media, I put it on a
tape and then carry the tape over to the 11/45 and write it onto the
appropriate media.
I also found this:
http://www.chd.dyndns.org/rx02/
This is very cool. It's an RX02 simluator (hardware/software) that makes
your PDP11 think your PC is an RX02 drive. It would be great if I could
read the files from a real RX02 and then dump them into the emulated RX02.
Can a PDP11 have two sets of RX02 drives installed at once? If so, do the
second set of drives become DY2: and DY3:?
--
TTFN - Guy
31 Jan
31 Jan
2:49 p.m.
So far (thanks to help from Howard Harte) I've got
an 11/44 with an RX02
drive running RSTS that has the DD module loaded. I'm running the serial
tape drive simulator on a PC (I forget what it's called or who wrote it).
Install RT-11 or BSD2.11 with TCP/IP network via Ethernet (DEUNA or DELUA)
and you can just FTP image files in and out of the machine.
Can a PDP11 have two sets of RX02 drives installed at
once? If so, do th
second set of drives become DY2: and DY3:?
Yes, you can, but the second pair will be at a different CSR/vector that
you have to configure. In order to get RSTS/E to see it, you'll probably
have to put them where it'll autoconfigure it.
Tim.
7112
days inactive
7113
days old
6 comments
6 participants
participants (6)
-
ggs＠shiresoft.com -
jhfinexgs2＠compsys.to -
pkoning＠equallogic.com -
shoppa_classiccmp＠trailing-edge.com -
vcf＠siconic.com -
wacarder＠usit.net