>Other than the media will not store the same amount without resorting
>to RX33 (or similar) formatting. The RX02 is 512kb on 77 tracks and 26
>sectors of 256 bytes. That really doesn't work on 5.25 floppies. So
>likely the format is a bit more munged. Anyhow calling something that's
>media incompatable a "RX02" sorta makes for great confusion. Hell I
>have a solidstate serial disk that emulates a TU58 that uses ram for
>storage, it's a TU58 to the software (DD driver) and it's 256k per tape
>but it's hardly media compatable. So if someone says RX02 it means 8"
>SSDD floppy using DEC M^2FM encoding of the data fields and is able to
>read and write RX01 media. Even a DSD880/120 obeyed that!
Thanks, Allison... exactly my point...
And in fact, early versions of DSDs didn't look exactly like RL01s,
they were larger... requiring changes to the driver so that they
would work. But these changes were NOT made to the distributed
sources... the owner's manual for the DSDs described the changes
to make.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry zk3.dec.com |
| Unix Support Engineering Group | (home): mbg world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of ' ' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
< for ADAC NMR (aka MRI) scanners that run a heavily modified RT-11 V4,
< where the 5.25" 80-track floppies are basically treated as if they
< were double-sided RX02's. (i.e. the geometry only uses 77 tracks,
< and actually skips the first track, just like a real RX02!)
Other than the media will not store the same amount without resorting
to RX33 (or similar) formatting. The RX02 is 512kb on 77 tracks and 26
sectors of 256 bytes. That really doesn't work on 5.25 floppies. So
likely the format is a bit more munged. Anyhow calling something that's
media incompatable a "RX02" sorta makes for great confusion. Hell I
have a solidstate serial disk that emulates a TU58 that uses ram for
storage, it's a TU58 to the software (DD driver) and it's 256k per tape
but it's hardly media compatable. So if someone says RX02 it means 8"
SSDD floppy using DEC M^2FM encoding of the data fields and is able to
read and write RX01 media. Even a DSD880/120 obeyed that!
Allison
>It's definitely hardware only. See my other reply to Daniel as to why I
>don't know exactly what's on it....
Is there any service which duplicates fiche? (and produces something
readable?)
I remember making fiche for listings of various things back when I worked
on some DECsystem-10s at the PK1 (parker St, Maynard, MA) facility. The
fiche was produced by some device which read magtapes with
machine-readable listings, produced on the -10... At one point, I did
what was required to produce a set of fiche with the RT-11 listings
on it... this was RT V2C.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry zk3.dec.com |
| Unix Support Engineering Group | (home): mbg world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of ' ' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
>Umm... 8" is what pretty much defines RX02s... I don't know of an RX02
>which was other than 8"
You gotta get out of the development world and into the real world
a little more often, Megan :-). I do a lot of software development
for ADAC NMR (aka MRI) scanners that run a heavily modified RT-11 V4,
where the 5.25" 80-track floppies are basically treated as if they
were double-sided RX02's. (i.e. the geometry only uses 77 tracks,
and actually skips the first track, just like a real RX02!)
-----
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology Voice: 301-767-5917
7328 Bradley Blvd Fax: 301-767-5927
Bethesda, MD, USA 20817
<OK, I've found the TCP/IP distributions on the Kent University web site
< The thing is, they're on RX02 disk images of some sort. How on earth do
< deal with these? They obviosly aren't compatible with Bob Supnik's
< Emulator, at least I couldn't access them.
post the URL I'll look.
<
< I'm wanting to use them on my SMS-1000. It is a PDP-11/73, 4Mb RAM,
< Ethernet, and a funky drive controller which in the case of the 5.25"
< floppy I believe is able to emulate either a RX50 (how it currently is s
< or a RX02. I'm wondering if the RX02 mode requires the model with the 8
< drive, which I just happen to have in a shed out back (obviously not as
< decked out, and with a dead hard drive, but still a /73).
RX02 is an 8" media so it would stand to reson it would be an 8" drive
to be compatable.
Allison
<
< Zane
< | Zane H. Healy | UNIX Systems Adminstrator |
< | healyzh(a)ix.netcom.com (primary) | Linux Enthusiast |
< | healyzh(a)holonet.net (alternate) | Classic Computer Collector |
< +----------------------------------+----------------------------+
< | Empire of the Petal Throne and Traveller Role Playing, |
< | and Zane's Computer Museum. |
< | http://www.dragonfire.net/~healyzh/ |
<
OK, I've got the RX02 virtual disk images I want on my 486 (it's the one
with the 1.2Mb floppy, booted into DOS, and started up 'putr'. I made a
RX50 using putr, and go to copy the smltcp.dsk image to the RX50.
Unfortunatly it complains that there isn't enough room. I take it that a
RX50 is less than 500k? I think the image is 492k.
Is there some way that I can split the disk images and then recombine them
once I've got them copied over to the /73? I'm just not feeling energetic
enough to want to move a RL02 drive around and juggle the controller
between my MicroVAX and /73 to get the files transferred tonite.
Zane
| Zane H. Healy | UNIX Systems Adminstrator |
| healyzh(a)ix.netcom.com (primary) | Linux Enthusiast |
| healyzh(a)holonet.net (alternate) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| and Zane's Computer Museum. |
| http://www.dragonfire.net/~healyzh/ |
>Logical disks, cool... What can I say, I'm learning :^) On the other
>hand, it looks like this shows a definite problem with having manuals that
>are a LOT older than the version of RT-11 I'm running. I can't even find
>'mount' in the manuals :^(
Which version are you running? LD: wasn't a standard distributed
driver until V5. For pre-V5 systems, there are DECUS equivalent
drivers.
Tim.
"Daniel A. Seagraves" <DSEAGRAV(a)toad.xkl.com> wrote:
>[Megan's getting a KS...]
I'm hoping to... nothing definite yet. But I'm also almost definitely
getting an 8/E soon...
>I know where I could get a KL, but I don't have room for it... (Or
>power...) It's safe, don't worry about it :)
Good...
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry zk3.dec.com |
| Unix Support Engineering Group | (home): mbg world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of ' ' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
> Well, I know basically nothing about Apple ///'s, however, I do know that
> the ///+'s are well marked as that. At least mine is.
>
My school had a bunch of Apple ///'s, and also a bunch of Apple ///+'s.
The ///+'s are definitely marked as that. Unless the "+" got rubbed or
scraped off of yours...
--
-Jason
(roblwill(a)usaor.net)
ICQ#-1730318
>>OK, I've found the TCP/IP distributions on the Kent University web site.
>>The thing is, they're on RX02 disk images of some sort. How on earth do
>>I deal with these? They obviosly aren't compatible with Bob Supnik's
>>Emulator, at least I couldn't access them.
>
>You put the disk image on a RT-11 disk and mount it using the LD:
>(logical disk) handler. Logical disks are RT-11's implementation of
>subdirectories, and you can even have logical disks inside logical
>disks. As an example:
Thanks, Tim... I took him at his word that he had RX02 images...
