---------
> From: Ward D. Griffiths III <gram(a)cnct.com>
> To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
> Subject: Re: Museums
> Date: Thursday, March 25, 1999 1:14
> (The FCC stepped in because of complaints
> from the close neighbors of folks running TRS-80 Model Ones (or Apple IIs
> or Commodore Pets or S-100 boxen) on the other side of an unshielded wall
> from a television with rabbit ear antenna in apartment buildings).
Our Spectrum Management Agency (or whatever it's called this week) has a
less enduser friendly attitude towards dipsticks in fringe areas that think
they should be able to watch marginal signals on "rabbit ears" inside a
substantial building.
It amounts to "Get an outdoor antenna." No outdoor antenna, no valid
grounds for complaint. There are no specific regs regarding emf emission
>from computers, they have put the onus on the RECEIVER manufacturer to
ensure adequate filtering & shielding from unwanted signals. The CB fad of
the 70's was a direct cause of this, after it was discovered that perfectly
functional CB's would drive certain televisions berserk because of stupid
choices of IF frequencies (Amongst other "They did WHAT!" type design, um,
features.)
If you have a properly installed external antenna (Yagi of some kind - cut
for the channels you are trying to receive) and proper coax feed into the
set, and you are STILL getting interference, only then will they look into
it.
This attitude has cured enormous numbers of problems.
Cheers
Geoff Roberts
Computer Systems Manager
Saint Marks College
Port Pirie, South Australia
geoffrob(a)stmarks.pp.catholic.edu.au
>Now the first quesiton is this. I've got a bunch of RL01's and RL02's with
>software on them, and when I got them I backed them up onto my Linux box so
>I could play with them in the Emulator without having RL01/02 drives in the
>house. Using the network I should be able to transfer those Disk Images
>over to the PDP-11. However, can I mount those disk images under RSX-11M
>4.2 like I can RT-11 disk images under RT-11? If so what do I need to do
>this?
If you wanted access to the RT-11 files on the RL02, you'd use FLX. Type
HELP FLX at the MCR prompt.
I suspect that you want to access the "raw" image, though. If you were
using 11M+, you'd do a MOU /FOR, then you'd be able to block-address
the drive as the file "DL0:", etc. Under 11M you don't even have to do
the /FOR (though you may have to do an ALLocate.)
>Second question. As I understand it, using DECnet it is possible to use
>the tape drive on VAX from another VAX.
Depending on the version and the tape interface and what software you have,
yes it can be accessed over the network. The best way to do this is to
have the machine with the drive do TMSCP serving to the rest of the cluster,
though there do exist DECUS freeware tools for non-cluster serving across
DECNET.
> Well, the VAX in the house doesn't
>have a tapedrive, and I've not run the network out to the garage. So is it
>possible to have the VAX access the TK-50 on the PDP-11/73 via DECnet?
FAL on RSX won't let you do so. But you could upgrade to 11M+ 4.5, and
use VCP to make a tape image. But even this isn't very smooth.
My favorite solution would be sneakernet - pull the drive and controller
and move it !
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
This is posted to two lists, apologies to those (Tony) who get it twice.
The library here at Power Tech is throwing out some old books. I got a
few, including the odd duplicate of things I'm often asked about, but there
are many more, all to go in the skip by the end of the week unless rescued.
I intend to keep the Mech. eng. handbook, but the others I will send to
anyone who can demonstrate a need (such as "I have a box full of TRAM
boards but no programming info") for the cost of shipping (I am in
Coalville, England). Oh yes. Raeto West's book (I already have it) is
about the best book on the PET you could hope to get.
Here's the list:
Baumeister, Marks, "Standard Handbook for Mechanical Engineers", 7th edn,
McGraw Hill 1967
Dunn S, Morgan V, "The PET Personal Computer for Beginners", Prentice Hall,
1981
Osborne A, Donahue C S, "PET/CBM Personal Computer Guide" 2nd edn., McGraw
Hill, 1980
West R C, "Programming the PET/CBM", Level, 1982
Eggebrecht L C, "Interfacing to the IBM Personal Computer", H W Sams, 1983
Brodie L, "Starting FORTH", Prentice Hall, 1981
Brodie L, "Thinking FORTH", Prentice Hall, 1984
Jones G, Goldsmith M, "Programming in Occam 2", Prentice Hall, 1988
Berry P, "Sharp APL Reference Manual", I P Sharp, 1979
Gilman L, Rose A J, "APL - an Interactive Approach", 2nd edn, 1976
Philip.
The 802 is the integrated computer/terminal unit. Call it a super-smart
terminal if you like, but it is a relatively convenient version of what
wasn't available much of the time back when these were current (early
'80's). It is not merely a terminal, though it will fill that function
nicely.
Dick
----------
> From: Joe <rigdonj(a)intellistar.net>
> To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
> Subject: Re: Televideo 802 computer?
> Date: Tuesday, January 26, 1999 10:18 AM
>
> George,
>
> Are you talking about the 802 (which someone said is a terminal) or are
> you talking about the computer? (model number ???)
>
> If you mean the computer then I listed it but I wasn't offering. It's
> still at the store. I was hoping they might turn up the computer. If
you
> need a copy, I'll see about getting it and making you a copy. If I don't
> find the computer sooner or later then you may end up with the original.
>
> If you mean the terminal manual then it's also still at the store but I
> don't want it so if you do then let me know and I'll see about getting it
> for you.
>
> Joe
>
> At 11:12 AM 1/26/99 -0800, you wrote:
> >I actually have one of these with no docs... Who was it that was
offering
> >a manual?
> >
> >George
> >
> >=========================================================
> >George L. Rachor george(a)racsys.rt.rain.com
> >Beaverton, Oregon http://racsys.rt.rain.com
> >United States of America Amateur Radio : KD7DCX
> >
> >On Tue, 26 Jan 1999, Richard Erlacher wrote:
> >
> >> It seems to me that the 802 was a televideo terminal with an
integrated
> >> workstation. These worked in conjunction with a server unit to run an
OS
> >> called MOST, I believe, and I have a couple of the server units, the
number
> >> of which will occur to me when I look at one again.
> >>
> >> These were fairly late technology, using 64k DRAMS and a 4MHz Z80A.
The
> >> servers had four or five serial ports using Z80 SIO's and either 10 or
20
> >> MB winchesters to go with their 5-1/4" floppies. They used the
> >> WD1000-series HDC, which used an 8X300 microcontroller (I2L
technology,
> >> Harvard architecture) and the WD1000 5-chip set. I always admired the
> >> packaging technology, which was first rate.
> >>
> >> I have to believe the workstations were up to the same standard in
> >> convenient packaging. Televideo was late getting into the desktop
> >> workstation market, but did it in a big way with these numbers, as
they had
> >> all you could want. The OS was purported, by some users I knew, to be
> >> quite a bit superior to MPM, which was quite established at that time
(late
> >> '70's, early '80's).
> >>
> >> If anyone is interested in the server units, I can make them
available,
> >> less drives, and possibly a couple of SIO/2's which I scavenged years
ago,
> >> for the packaging/shipping cost.
> >>
> >> Dick
> >>
> >> ----------
> >> > From: Joe <rigdonj(a)intellistar.net>
> >> > To: Discussion re-collecting of classic computers
> >> <classiccmp(a)u.washington.edu>
> >> > Subject: Televideo 802 computer?
> >> > Date: Tuesday, January 26, 1999 2:35 AM
> >> >
> >> > Does anyone have one of these? I found a manual for one of these
> >> yesterday
> >> > and it looks pretty cool.
> >> >
> >> > Joe
> >>
> >
> >
I've been looking in my old Tek catalogues and the disk drives for the 4050
series are model number 4907, not 4097. This is from my 84 catalogue. Option
31 is three disk drives, option 30 is two disk drives and option 40 is 4052
and 4054 compatibility.
Paxton
>
> No not yet. I'm going to try and get the parts and make a terminal
>cable tomorrow.
You have to be REAL careful which way the pins go on that. I had to
make two of 'em because the FAQ (where I found the pin assignments)
wasn't really clear which way you should be looking at it. (They ended up
being opposite)
>>If the root password is changed, your going to be screwed without system
>disks.
>
> I'm afraid you're right. That's the nature of Unix.
I was lucky on mine. All of them came from the factory with a preset password
which was *something* like "MPC" or something like that. Anyway, it should be
in the 3B2 FAQ.
Les
> Also, You mentioned DirctCD. Most normal CD players can't read discs
> written using packet-writing technology --
Bad form, replying to your own post, but I realized I should clarify this.
Other CD /drives/ can read discs written using packet-writing, once they've
been finalized, but packet-writing uses a different filesystem layout, so
the operating system won't recognize them. Several CDR vendors, including
Adaptec, provide drivers along with their packet-writing software, but
typically only for Win95, Win98, NT, and sometimes Macintosh OS's. You
won't be able to use such a disc from 16-bit DOS, Unix (probably), and other
platforms.
RSTS, I would think, is right out.
> Paul Kearns
> paulk(a)microsoft.com
>
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>Actually, there was a thingy called PC/IX which ran on those non
>memory-managed systems. I actually managed to snag a copy a few years ago.
Well, and of course there's Minix (where Linux started)...
Any Unix clones for 8080/Z80 systems? It ought to be doable, given that the
original Unix was done on a 64KB address space machine...
- Joe
Hi there.
I finally scored a piece of disk-based software for Atari 8-bits, so I
decided today to test out my atari disk drives to see if any of them
actually worked.
One 1050 did.
The other 1050 doesn't run the seek test when you turn it on, and is
invisible to the computer. I removed the actual disk drive from the
cabinet and verified that it does in fact work in the other 1050 chassis.
While doing this I noticed that the non-working 1050 seemed to have had a
modification done (rather sloppily, I might add; I suspect this has
something to do with why it doesn't work properly).
There is a hand-written silver sticker over what I'm assuming is an EPROM
that reads, "Doubler". There is a second Motorola 6810 piggybacked onto
the normal 6810, and a couple of jumper wires leading off into the PCB.
What was this, and how was it done properly (so I can verify that it's
ok)?
I have a Percom branded full height disk with Atari SIO connects on that
also seems to not work. I think this is because I need to decipher the
4-position DIP switch at the back panel. Any hints? As it is now, the
access light repeatedly switches on and goes off again, each accompanied
by a moderately loud click. The light is on for a second and then off for
maybe two. It doesn't ever stop doing this, and the drive is invisble to
the computer. The drive inside is full height, and made by Tandon I
believe.
ok
r.
