>Does anyone know of a company that is still setting external RF Modulators?
>This would be used to hook up the video output of a Apple ][ series
>computer to a standard TV. I know I could use a VCR, but i'd like to
>have a RF Modulator...
I picked up my latest Jameco catalog, and they've got two RF modulators
available. Both are switch selectable for Ch 3 or Ch 4.
Part No 135191 takes an 8VDC power supply, and is $3.95.
Part No 141639 takes a 12VDC power supply, and is $4.95.
For more info, see http://www.jameco.com/
I seem to recall a header connector in the Apple II specifically intended
for supplying modulator power. If this has 12VDC on it, you're set!
Jameco also has some other Apple II parts availble, including a replacement
II/II+/IIe power supply (Part no 22269) and a IIGS power supply
(Part no 85518).
--
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
Does anyone know of a company that is still setting external RF Modulators?
This would be used to hook up the video output of a Apple ][ series
computer to a standard TV. I know I could use a VCR, but i'd like to
have a RF Modulator...
-Lawrence LeMay
lemay(a)cs.umn.edu
<I have model m35 (386sx and slc version do exist) that has ISA slots,
<m25 and m30 can either be 8088, 286 or SX. Model 40 used same board
<as m35 except more slots and more drive bays. To differeniate:
<starting model series based on MCA from ISA is m50 and up.
Ok... by the book:
PS2/m25 is a 8086 (xt class) with 3 ISA slots and floppies
PS2/M30 is the same with a hard disk.
That and the trackstar board was only availabel as ISA that I can find
data on. They were most commonly seen around here in Tandy 1000sx/ex
machines.
the PS1/m25 is 286 as are a slew of other PS1 ISA models but they
are somehow modeled as PS1 members of the PS2 family of PC systems.
Now we have a subspecies of a species I guess.
Bizzare but they are all 85xx-xxx! So much for consistant naming.
<BTW, all PS/2, many PS/1s, some Aptivas, any IBM machines were good
<made quality-wise even case components and circuit boards.
I have a PS2/25 (8530-001) and a PS2/m50z 8550-061 and they are certainly
well made and easy to work on. A lot of people like the ps2/m25s as they
were ISA and fast for XT with good video and a nice small pizza box.
the ugly ones (to some) were the integral monitor varients.
Allison
<>That was the plan. I found that the 11/130 I have runs RT-11 quite
<>nicely and it's the fastest of the tu58 based systems (uses an oddball
<>parallel interface tu58).
<
<And is that using the technique I developed for positioning files
<on the TU58 to reduce latency on RT? I've had RT cold boot from TU58
<in as little as 28 seconds...
That and the PDT11/130 parallel interface VS standard TU58 serial
interface. The PDT11 version of the TU58 is an oddity and becuase of the
parallel interface some of the serial versions buffer overflow and data
pasing issues are not a reality so you end up running closer to the
possible peak data rate with less host latency. The giveback is the
PDT11 uses the LSI-11 clearly the slowest of the PDP-11s (t11 can beat
it!) so if there is any procesing the tu58 is not the bottleneck anymore.
Allison
<>the 11/23 (m8186 dual) plus two MXV11s and a RQDX3 does work if you don't
<>mind using a tu58 to boot it!
<
<I've not tried an 11/23... but the 11/73 doesn't work for me...
Never tried the 11/73 as I never had one that was dual width.
<Why would you need a TU58 to boot the system if you have an RQDX3
<(supposedly attached to some disk)?
The disk and breakout were powered off a second ba11-v (the disk would
crush the PS current limit if the first box powered it). The TU58 booted
it as I didn't have a simple MSCP toggle in boot.
Allison
>;) you betcha. Us mill rats were hacking things together that made the
>the infernal field circus nuts.
Yep...
>I worked for CSSE, the Field Circus engineering arm. Our cave was
>terminals and printers to year 0. However I was one of those that
>scrounged whereever I was for systems and put together some creative
>combinations that were not warmly recieved by the PDP-11 CSSE group we
>were colocated with. I can still hear Evans asking me how I got two
>RL02s, 2 BA11 11/23s and RX02 in the same 40" rack then plugged a LN01
>laser printer into it. He swore there was no compatable Qbus interface
>for the laser printer till I showed him a LPV11 with a LPV180 cab kit!
>There was the many examples of unsupported but works. Remnents of that
>beast followed me around from '84 and still sits in my room in a
>different rack.
And I worked in the RT-11 development team, but was the 'procurement
division' (scrounger) who would collect parts and put together systems
in our lab (the Cave). I also got involved with a lot of the
reconfigurations when an SPR came in reporting a problem with a
specific configuration.
My best scrounge, though, was an 11/84 system built from parts found
in various locations around the Mill (I regularaly walked around the
Mill looking for discarded -11 parts)
>Anywho, I've seen a lot of systems, the joke was missed on badge vs cpu
>installed. Most if not all were never what the badge said they were.
>If I wanted to be pendantic I do have the MicroPDP-11 handbooks. But
>like I'd said and I think Tim said in the end it's the contents not the
>label and whatever you do have, enjoy it. They are all in whatever
>current incarnation may now be, good systems that meet the "Robust and
>mature systems we know how to use." mantra.
Not lost on me... I've got a couple of BA123 systems at home which
very clearly are uVAXII/GPX systems (badge) -- but one is an 11/83+
and the other is an 11/93. I also have a BA213-based box which
states it is an 11/83, but is a mongrel VS3600 (or so).
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 |
+--------------------------------+-------------------------------------+
>I've always run out of slots before running out of power.
>
>the 11/23 (m8186 dual) plus two MXV11s and a RQDX3 does work if you don't
>mind using a tu58 to boot it!
I've not tried an 11/23... but the 11/73 doesn't work for me...
Why would you need a TU58 to boot the system if you have an RQDX3
(supposedly attached to some disk)?
>For the pro350, not so for the PDT11/1xx.
Right...
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 |
+--------------------------------+-------------------------------------+
Hi All:
New documents added to http://highgate.comm.sfu.ca/pdp8 this evening:
Core Memory Stack, 16K
Front Panel Control Board (LED)
PDP-8/E Front Panel Control Board (BULB)
16K 12 Bit Base Board (Core Control)
Memory Extension and Time Share Control
All documents are hardware print sets. Credit as usual goes to David
Gesswein for scanning this material.
Other new material includes documentation on the pdp-5 and the pdp-12.
Admittedly these are off topic, but the contributor, Al Kossow, thought
that highgate would be a good place to put the material!
Highgate also takes your submissions: if you have any docs or software on
the pdp-8 that is not included on the site, let me know and I will add it.
Kevin
==========================================================
Sgt. Kevin McQuiggin, Vancouver Police Department
E-Comm Project (604) 215-5095; Cell: (604) 868-0544
Email: mcquiggi(a)sfu.ca
>I loved the VT11/VR17's on 11/34A's. Racal Redac used em for
>cad stations for circuit board design.
When I was at Worcester Polytech, I wrote a program for a class in
comptuer graphics which used the VT11/VR14 (on an 11/40) to design
simple logic circuits. There was a library of simple gates along
one side of the screen and one used the light pen to drag a part
onto the design grid and place it in position. Once all the parts
were on the grid, the inputs and outputs could be connected. And
there was a special input for a clocking signal, and other inputs
were supplied from the front panel switches. The state of the gates
was displayed in table form on screen and one could watch as the
circuit operated.
Pretty simple stuff, compared with *real* cad work... but it was
fun, and get me a good grade (and actually got me graphics work with
other departments at WPI)
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 |
+--------------------------------+-------------------------------------+
Yeah, I checked, Jay's correct. There is only one input and it is for the
5272. The card, as I recall, is the main card and a hardwired daughter
card. I was hoping to us the setup in another system. But it was
obviously (when I opened the box) better left in the original
configuration.
It is a very nice adapter and monitor, if you can get one...
-Mike
----------
> From: Jay Jaeger <cube(a)msn.fullfeed.com>
> To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
> Subject: Re: IBM 3270 PC
> Date: Friday, September 24, 1999 6:09 PM
>
> True, so long as you have the MONITOR. I believe the original
> correspondent did not have the monitor, and another correspondent
suggested
> that an ordinary monochrome monitor would work. Not true, AFAIK.
>
> Jay
>
> At 08:19 AM 9/24/99 -0600, you wrote:
> >I use my 3270 as a standard PC. The display adapter and monitor work
fine
> >with all software, even comes up in color with UCSD Pascal. No need to
pull
> >the works.
> >
> >-Mike
> >-----Original Message-----
> >From: Jay Jaeger <cube(a)msn.fullfeed.com>
> >To: Discussion re-collecting of classic computers
> ><classiccmp(a)u.washington.edu>
> >Date: Thursday, September 23, 1999 9:06 PM
> >Subject: Re: IBM 3270 PC
> >
> >
> >>The part quoted below about the display was incorrect. A true 3270 PC
used
> >>a special display adapter as well as
> >>a special keyboard adapter and some special expansion memory (cabled to
the
> >>keyboard adapter, if I recall
> >>correctly). However, you can pull all of that out, and you will have a
> >>more or less standard XT. You can leave the
> >>coax card in, if it suits your fancy, and you have a 327x controller
around
> >>somewhere... 8-)
> >>
> >>
> >>Jay
> >>
> >>
> >>At 04:45 AM 9/23/99 -0500, you wrote:
> >>>.The monitor should be a
> >>>regular green or amer mono unless a different video board was used as
an
> >>>aftermarket item.
> >>
> >>
> >>
> >>>David Williams wrote:
> >>>
> >>>> Got an urge to go to a thrift I haven't been to in a while and found
> >>>> what was labeled as a 3270 PC. Brought it home and opened it
> >>>> up. Looking at the boards inside I'd guess it was a 3270 PC as the
> >>>> label said. No keyboard or monitor. I'm guessing it used different
> >>>> ones than the normal PC. It has a hard disk, but have to pull it to
> >>>> see what type first and 2 half height 5.25" floppies. Not sure what
> >>>> software is on the drive. Anyone tell me anything else about this?
> >>>> Such as where to locate a keyboard and monitor, what each of the
> >>>> boards might be, etc. I can go into some detail on the cards if
> >>>> need be. Half appear to be normal drive controllers and serial
port,
> >>>> etc. Then there is one with a BNC connector and two others that
> >>>> have a small jumper board between them. Should I even keep it?
> >>>> Hmmmm....
> >>>>
> >>>> Thanks.
> >>>>
> >>>> -----
> >>>> David Williams - Computer Packrat
> >>>> dlw(a)trailingedge.com
> >>>> http://www.trailingedge.com
> >>>
> >>---
> >>Jay R. Jaeger The Computer Collection
> >>Jay.Jaeger(a)msn.fullfeed.com visit http://www.msn.fullfeed.com/~cube
> >>
> >
> ---
> Jay R. Jaeger The Computer Collection
> Jay.Jaeger(a)msn.fullfeed.com visit http://www.msn.fullfeed.com/~cube
