> > if anyone can shed some light on these, let us know):
> >
> > 1. "12v vid"
> > 2. R-Y (colorburst clock)
>
> Red - (minus) Yellow
>
> > >3. Audio out
> > >4. Y
>
> Yellow
>
> > >5. B-Y (ext video input?)
>
> Blue - yellow
>
> > >U. Ground
>
> Just a different way to send an 'RGB' signal. I'm not sure what the merit is
> of sending it this way... any video techs out there? I'll cc this to one who
> might know.
Um... No. Sorry. Close though.
Y is not yellow, i'm afraid. These signals derive from the way
luminance and chrominance are handled in a telly.
Y is intensity (luminance). It is made up of red, green and blue in the
rough proportions that generate intensity in a human eye. This is the
only part of the signal that a black and white telly (or greyscale
monitor) would decode.
The other two signals are the quadrature components of chrominance.
They are derived from Y by subtracting red and blue, and are normally
called U and V (in some order).
The colour telly receives U and V phase modulated onto a subcarrier (I
think). The hue control on American tellies sets the baseline against
which phase is measured here. (In Europe, the PAL system reverses the
phase each line, so any hue errors should cancel out)
The signals are transmitted this way in broadcast TV to ensure
compatibility between colour and BW tellies. They are also the signals
that would normally be sent to a TV (UHF or VHF) modulator from the
computer, hence their presence on the video connector.
Hope this helps! I could be more specific if I had some of my reference
books from home...
Philip.
<><><><><><><><><><><><><><> Philip Belben <><><><><><><><><><><><><><>
Bloedem Volke unverstaendlich treiben wir des Lebens Spiel.
Grade das, was unabwendlich fruchtet unserm Spott als Ziel.
Magst es Kinder-Rache nennen an des Daseins tiefem Ernst;
Wirst das Leben besser kennen, wenn du uns verstehen lernst.
Poem by Christian Morgenstern - Message by Philip.Belben(a)powertech.co.uk
>From: Doug Spence <ds_spenc(a)alcor.concordia.ca>
>Subject: C64 CP/M carts (was: Re: Yet another weekend haul story)
>On Mon, 2 Jun 1997, George Lin wrote:
>> At 11:24 PM 6/1/97 -0700, you wrote:
>> ><...>
>> >> accessories including a CP/M cartridge for C64
>> >
>> >A CP/M _carthridge_? Awesome.
>>
>> I just tried it yesterday. Pretty cool. The Z80 is in the cartridge. The
>> package comes with a CP/M 2.2 diskette for 1541 and a condensed CP/M manual
>> by Commodore (copyright 1983). There is a K-Mart price tag on the original
>> box that reads $54. Not bad.
NOTE: the Commodore CP/M Cart is only usable on the oldest of the 64s
(usually models with the 5-pin DIN plug for video. It would seem that
when Commodore debugged some video problems they tweaked the system
speed slightly which made the CP/M cartridge unusable.
>This reminds me... I also have a Z80 cartridge for the C64. But it's not
>the one from Commodore. It's from a company called DATA 20 Corporation.
>I haven't been able to get it to work. It has what looks like a connector
>for a power supply on the back, but I didn't get the PS with it. It also
>came without any disks, though it did have a cassette in the box with it,
>which says "Use side A for Commodore 64/Use side B for VIC 20".
>It's a Z-80 Video Pak, that combines the Z80 processor AND an 80-column
>display adapter into one (big fat) cartridge.
Are you sure the plug isn't for some sort of video cable contraption?
(the Data-20 carts usually sported an 80 column composite video output.)
>To quote from the box:
> The Z-80 Video Pak brings the convenience of an 80 column screen and
> the power of a CP/M compatible operating system to the Commodore 64.
> Designed to be used with a monitor, the Z-80 Video Pak lets the
> Commodore 64 owner switch to a 40 or 80 column screen in black and
> white, or back to the standard color screen. All switching is done
> through software and no cables need to be moved.
> The Z-80 Video Pak has its own Z-80 microprocessor and operating
> system which allows the 64 to run CP/M software formatted for the
> Commodore 1541 disk drive. A Terminal mode which brings communication
> with central data bases is included at no extra cost. The Z-80 Video
> Pak also supports the advanced screen handling features of all Video
> Pak models such as erase to the end of line, erase to end of screen,
> and dump screen to printer.
>If anyone out there knows this thing's power requirements (AAAGH! Another
>wall-wart!) and where to get CP/M disks in 1541 format, please tell. :)
If there is power needed for it, I haven't seen anything mentioning
requirements... yet.
Larry Anderson
--
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Call our BBS (Silicon Realms BBS 300-2400 baud) at: (209) 754-1363
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>>True, that's bizarre... they appear to be especially common in the
>>northwest. But just try to find a PEB!
<snip>
>The closer you get to Texas, the more abundant TI-99 stuff gets.
So true! I worked for TI in Dallas at the time of the big selloff. I remember buying several consoles for $25, a PEB for $20, several monitors for $50, and catridges for $.50 each. All brand new in boxes. What a madhouse it was.
Bob
slightly off but information needed.
Cipher model st150s-II 6150? cartridge tape drive scsi interface.
I need data on this jumpers commands anything.
Allison
At 01:32 AM 6/12/97 -0400, you wrote:
>- I'd like a MSX machine as well (never even seen one in anything other
>than magazine articles)
I *sorta* have an MSX machine. It was donated to ABACUS, the Atari Bay Area
Computer Users Society, but isn't of much interest to the club. So it sits
in my garage (or attic?). One of these days, I'll get around to making a
suitable cash donation to the club and move it in with my collection.
In the meantime, if anyone wants any info or anything, let me know and I'll
dig it up...
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
sinasohn(a)crl.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.crl.com/~sinasohn/
The 99/4A DIN video pinout is (format in monospace for best
readability):
3 1
5 4
2
where (and no, I didn't write these descriptions, they're pretty
bizarre. I typed them verbatim; if anyone can shed some light on these,
let us know):
1. "12v vid"
2. R-Y (colorburst clock)
3. Audio out
4. Y
5. B-Y (ext video input?)
U. Ground
Kai
> ----------
> From: Cord Coslor[SMTP:coslor@pscosf.peru.edu]
> Reply To: classiccmp(a)u.washington.edu
> Sent: Tuesday, June 10, 1997 1:21 PM
> To: Discussion re-collecting of classic computers
> Subject: Re: TI-99/4A Comments
>
> I have a question for you folks. I have a basic TI 99/4a.... that's
> it. No
> cables, no peripherals, no nothing with it. I am wanting to get this
> machine up to operation and am looking for anything that you folks
> might
> have available. I have a large assortment of running machines in my
> collection... TRS-80s, CoCo, Commodores, etc., etc., and would like to
> add
> this classic machine to my 'operational' collection. Can anyone help
> me
> out?
>
> Thanks in advance,
>
> CORD
>
> //*===================================================================
> ==++
> || Cord G. Coslor P.O. Box 308 - 1300 3rd St. Apt "M1" -- Peru,
> NE ||
> || (402) 872- 3272 coslor(a)bobcat.peru.edu
> 68421-0308 ||
> || Classic computer software and hardware collector
> ||
> || Autograph collector
> ||
> ++====================================================================
> =*//
>
>
fyi, posted on comp.os.cpm ...
- glenn
A friend in a bit of a time bind will probably be sending a PDP 11/34
to the landfill very soon. If you want it, and probably a half dozen
other assorted racks of minicomputers plus hundreds of reels of 1/2"
tape, but NO S-100 stuff (you can probably guess who got THAT!) e-mail
immediately.......
stuff is located in Tucson, very close to I-10
sorry, no one available to pack it, but Amtrak does stop here.......
and they shi[p stuff pretty cheap......
bill_h(a)azstarnet.com
> | WoW! The more I hear about this thing the more I want one.
>It's amazing
> | that this system was so unknown in the states. It's like
>discovering a
> | whole new species.
>
>Yep, I was obviously thrilled when I ran into my Spectravideo 328 in its
>original box, for $5 at a local thrift...
>
>Sorry Sam, didn't mean to gloat there.
>
>Did I mention it was accompanied by the cassette drive in its original
>box too?
>
>Kai
Me too...well not in original boxes but I do have one with monitor
(TV+modulator?) disk drives, cassette deck,software,CPM 3 (?) etc that I
got for eqiv US$12. The only thing is that it intermittantly resets itsself
and I have not had a chance to look at ti since I got the thing,
I also got
a set of boards from a cromenco s100 system for nothing :-)
2 TRS80 model 3s (which I can hopefully get 1 working) $0
1 TRS80 model 4P (Repaired phase locked loop circuit in video) $0
1 Sinclair Z88 with MacLink ROM installed $4
1 Sinclair ZX 81 not going $0
2 Sinclair QL's with 1 mono monitor $0
1 Apple ][e with drives and UHF TV/Monitor $9
1 Kaypro 4 a couple of years back for $30
1 Kaypro 10 (fitted new HD ) for $0
1 ALTOS 8088 Unix based system supposedly in working condition (yet to try) $20
1 IBM PC $0
1 IBM XT $0
1 VT100 terminal $0
and soon to arrive is
2 TRS80 model 1
1 TRS80 model 3
1 TRS80 model 4D
1 Dicksmith Systems 80
1 Amstrad 464
1 Amstrad PCW8256
and I'm on the scent of
Apple Lisa
Amstrad PC Clone
Amstrad monitor (suits the 464/664/6128)
Commodore 64
Commodore PET
Atari 800
Sinclair spectrum
Sinclair ZX80 (kit set..maybe unbuilt !)
PDP 11 (model unknown)
Microvax (dead PSU)
However I would like to acquire
Jupiter Ace (forth based machine)
Commodore SX64
Any Bondwell CPM machines
Cheers and good hunting
+----------- Keith Whitehead -----------+
| Physics and Chemistry Depts |
| Massey University |
| Palmerston North |
| New Zealand |
| |
| Ph +64 6 350-5074 Fax +64 6 354-0207 |
+------------------------------------------+
True, that's bizarre... they appear to be especially common in the
northwest. But just try to find a PEB!
Kai
> ----------
> From: Bill Whitson[SMTP:bill@booster.bothell.washington.edu]
> Reply To: classiccmp(a)u.washington.edu
> Sent: Monday, June 09, 1997 3:52 PM
> To: Discussion re-collecting of classic computers
> Subject: TI99 (was Re: 8088s seattle comp.)
>
>
> Not along the same topic but I'm curious - just how
> popular was the TI99. From what I've seen scrounging
> over the years it looks like it might have been the
> most popular (or at least most numerous) micro ever made.
> Now, I know that's not true. It's just strange - I
> could go out this weekend and easily come home with 30-
> 40 of these machines, wait a month or two and probably do
> it again. There's one local junk store here that had
> 11 of them lying around when last I checked. They're
> like roaches ;).
>
> Bill
>
> HOWEVER, like other posters to this list, I have a wife that "simply
> doesn't understand the value of old computers" and am currently
Ha! I am the wife! I control the... Well I don't have that problem
other than a KI10 would be out of the question unless "just passing
through". ;-)
Allison
