> A Composite video conversion is pretty easy; I converted a G7400 over in
> about 5 minutes.
Could I have some details, please? Is composite Video easy to find in
the circuit, or do I have to reverse engineer or poke around with a
scope?
Philip.
> Assuming that there are no other connections to the 'Modulator' then one of
> those wires has to be a power rail. I'd guess (without seeing the device or
Oops! The connection to the PSU is another ground, so I guess you must
be right.
> the service manual) that the other 2 were luminance (Y) and (PAL-encoded)
> chrominance, or possibly composite colour video and audio if it feeds audio
> through to the TV.
If one is not composite video, where is the sync encoded? On Y (i.e.
making it composite mono)? I suppose this could just possibly be video
+ composite sync - just what I need.
> >> >> What chips _other than the 8048_ are in this device? Is the video side
> >> >> custom or does it use one of the many Philips video chipsets? (Philips
> >> >> Prestel terminals tend to be stuffed with their Teletext IC's, for
> >> >> example...)
>
> >Pretty boring, I'm afraid - 8245 and 6110 plus about 20 TTL chips. I
>
> What the heck are those?
8245 is a Nat Semi keyboard controller. This chip says Intel on it, but
I was assuming, probably very rashly, that it was the same thing.
6110 is a typo for 6810 :-), in fact Motorola MCM6810, a RAM chip.
Looking it up last night I discovered that it is in fact 128 by 8 (yes,
128 bytes!) so I cannot think what it is used for! (It is too slow to
be a video output buffer)
Philip.
Hello, all:
Well, I finally heard from that guy at Temple University (Philly, PA) about
the truckloads of PDP equipment. I'm going down there next Friday to get some
stuff. I asked this question before, but didn't get a complete answer, so here
it goes again...
"If you were able to get your pick of PDP-11 equipment (like 11/34s) and
accessories, what would you get?" This is my first PDP acquisition, so I don't
know what to look for (and I don't have a truck, so I can't just haul it
all!). I don't even know how big this stuff is, but I'd like to try to get a
"complete" (whatever that is) PDP system, but a rack-mount style, which is
easier for me to transport.
From what I understand, the Temple computer department has truckloads of this
equipment, from all types of hardware to software and manuals. I'm looking for
an expert's recommendation as to what to shop for.
Thanks for the input!
-------------------------------------------------
Rich Cini/WUGNET
e-mail: rcini(a)msn.com
- ClubWin Charter Member (6)
- MCPS Windows 95/Netowrking
A Composite video conversion is pretty easy; I converted a G7400 over in
about 5 minutes.
> -----Original Message-----
> From: Philip.Belben(a)powertech.co.uk
> [SMTP:Philip.Belben@powertech.co.uk]
> Sent: Wednesday, August 13, 1997 6:20 AM
> To: Discussion re-collecting of classic computers
> Subject: Re: Philips G7000
>
> > > collectible. (What is the G7000 anyway? Yes, I did buy it! It
> has an
> > > 8048 as the CPU, of all things!)
> >
> > It is a video game system that is compatible with the Magnavox
> Odessey^2
> >
> > Do you have any cartridges for it. If not then I have a few
> duplicates.
>
> Yes thanks, I have four or five. I don't expect to use the thing
> until
> I can find out how to get composite video or RGB out, since I don't
> possess a television.
>
> [For those of you not in the UK, here one requires a licence to
> operate
> "Television Receiving Apparatus", which I think includes any TV with a
>
> UHF tuner, but not a monitor. The licence fee is (without looking up
> either the current fee or the exchange rate) about $120 a year, and I
> am
> not prepared to pay this. So I don't have a TV - and seldom miss it.]
>
> Philip.
----------
From: Kai Kaltenbach[SMTP:kaikal@microsoft.com]
Sent: Wednesday, August 13, 1997 5:32 PM
To: Discussion re-collecting of classic computers
Subject: RE: IBM 5100
> They're extremely rare. Rarer than almost anything except an Apple I.
> Just before I was lucky enough to be gifted mine from a saintly
> old-timer, I saw one sell for $650. That's the only one I've ever seen
> for sale, and the seller said he'd received over 60 inquiries. He also
> said he could have gotten more if he wanted to drag the bidding on for
> another couple of weeks.
Sheesh! It's all a matter of timing, I suppose. Aside from the system I didn't buy several years ago, I spoke with a town manager in upstate NY who had
trashed two 5100s after posting a "for sale" message on a web page and had received no responses.
> I am aware of a gentleman who may be willing to part with a 5110 + dual
> 8" external drives + printer, but he wants a "very generous offer" for
> it and the shipping alone would be a killer since the total weight is
> about 200 lbs (he's in PA).
Pennsylvania's not a problem -- I'm in Delaware and could certainly pick it up. What's the difference between the 5100 and the 5110?
> BTW, do you have a web page for your collection?
Not yet, but it's on my list of things to do...
-- Tony Eros
Proprietor -- FooBear's Cluttered Cellar Classic Computer Collection
I may have the opportunity to pick-up some PDP11 equipment. I'm not too
knowledgeable about the PDP11 series and all of the accessories that go with
it, nor do I have a complete list of the goodies at this time. What I'd like
to do though is to get a "complete" system for my collection (which consists
mostly of micro stuff).
Some of the equipment includes several 11/34s, 11/23s, 11/23+, 11/40, 11/05,
etc., RK05/RL01/RL02/RX01/RX02 drives, plus racks and a whole load of other
stuff.
Any guidance here would be appreciated. BTW, this stuff is at Temple
University (for all of those East-coast rescuers).
TIA!
------------------------
Rich Cini/WUGNET
<rcini(a)msn.com>
- ClubWin Charter Member (6)
- MCPS Windows 95/Networking
> Well, finding a composite video point is trivial, therefore.
>
>Inside the modulator can, I fear.
>
>I had another look inside last night. The two metal cans appear to be
>video circuitry (on motherboard) and modulator (separate). They are
>linked by a 4-way ribbon cable of which one conductor is ground. I
>suspect the remaining three of being video, line sync and frame sync.
>(They could, I suppose, be composite mono, U and V but I doubt it)
Assuming that there are no other connections to the 'Modulator' then one of
those wires has to be a power rail. I'd guess (without seeing the device or the
service manual) that the other 2 were luminance (Y) and (PAL-encoded)
chrominance, or possibly composite colour video and audio if it feeds audio
through to the TV.
>> >> What chips _other than the 8048_ are in this device? Is the video side
>> >> custom or does it use one of the many Philips video chipsets? (Philips
>> >> Prestel terminals tend to be stuffed with their Teletext IC's, for
>> >> example...)
>Pretty boring, I'm afraid - 8245 and 6110 plus about 20 TTL chips. I
What the heck are those?
>can't read the numbers of the chips inside the video can unless I
>desolder said can from PCB.
Well, that's what I'd have done by now...
>
>Philip.
-tony
Whilst in a self-induced trance, SUPRDAVE(a)aol.com happened to blather:
>i have this big apple monitor that i need some help with. it's big, beige,
>and heavy with a motorized tilt screen and a db15 connector. i'm having a
>video problem with the monitor. i don't get any kind of raster screen and i
>do not have the special card to run it on my //e. i've tried it on the video
>port of my laser 128 and on my dodgy apple ///, all to no avail. can anyone
>figure out a possible solution? if i cannot get it to work, i'd like to get
>rid of it, but it's so heavy it wouldnt be worth shipping unless you live in
>north carolina.
If it's a sub-miniature DB-15, then that sounds like a PC VGA plug-in. If
it's a normal-sized DB-15, then that sounds like it's a direct-connect for
a later-model Smackintosh. (I say this jokingly, I have one...) When I say
later-model, I'm talking a Mac IIsi or something like that, altho I think
the PowerMacs use that connector as well, and I believe it's compatible. (I
had my Mac IIsi hooked up to the monitor we use for a PowerMac 6100/60 at
work, and it worked fine.)
If you're looking to get rid of it, I would pay shipping to Michigan...
yea, it'd be expensive, but if it's a nice tube, it would make my Mac
happy... (all I have is the base, but it only cost me $5 and it works!) Got
a keyboard & mouse to round out the deal??? ;-)
HTH,
"Merch"
--
Roger Merchberger | If at first you don't succeed,
Programmer, NorthernWay | nuclear warhead disarmament should *not*
zmerch(a)northernway.net | be your first career choice.
I was sent this email and I figured who better to help this guy out, than
our little group.
===================================================
Return-Path: MajorLeague(a)getthe.net
Date: Thu, 14 Aug 1997 08:54:10 -0600
From: Major97 <majorleague(a)getthe.net>
Reply-To: majorleague(a)getthe.net
To: idavis(a)comland.com
Subject: Do those disk drives work?
Your disk drives mentioned in your rescue page, you have listed apple II
drives. Would you be willing to part with a couple of them? I would like
to know how much you would want etc. if you sold. I would pay shipping.
I have an apple knockoff (I think it is a pear) I really don't know what
it is but it came with apple IIe stuff. My drives are hatched.
Thanks
Steve
===================================================
I also encouraged him to join the list.
Isaac Davis | Don't throw out that old computer,
idavis(a)comland.com | check out the Classic Computer Rescue List -
indavis(a)juno.com | http://www.comland.com/~idavis/classic/classic.html
Hans Pufal <hans1(a)filan00.grenoble.hp.com> writes:
> The Art of Digital Design, an introduction to top-down design
> by Franklin P. Prosser and David E. Winkel
> Prentice-Hall 1987 ISBN 0-13-046673-5 025
Thanks.
Maybe this was a popular thing to do in the mid-1980s? The
undergraduate computer architecture course (1983 I think, maybe 1984)
I took basically went from gates to a PDP-8-like CPU over the course
of the semester. Somewhere at the beginning I think we spent a
half-hour on the fact that there are different logic families, but we
never touched on that again. (This was a Computer Science course,
Real Hardware seemed to be the province of the Electrical Engineering
department.)
> Talking of 16 bit extensions to the PDP-8, that is what the HP-2116A
> appears to be, anyone konw that processor?
By manuals only I'm afraid, and I spent more time fascinated by the
possibilities of user-developed microcode in the 2100A. The 2116A is
entirely hardwired, with two accumulators, 16-bit word, 32KW memory I
think. Oh, and stable across the same environmental conditions as
other HP instrumentation.
I suggest you webulate over to www.chac.org and look for the
plain-text versions of Engine 2.3 and 2.4. You want to read the
interviews with Barney Oliver and Joe Schoendorf in those issues.
-Frank McConnell
