| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1652.1 | Check your composite video cable! | MTWAIN::WOODS | George Woods DTN 223-9971 | Fri Sep 02 1988 16:24 | 13 |
| Composite means video and synch. pulses combined in one video output
(as it would be for modulating a TV transmitter). Adding chroma
(color) information doesn't make it more "composite." Where Paul
can record/play/display color, it is obvious that the signal is
a color composite signal. Therefore, if you see only black and
white on a composite color monitor, make SURE your composite video
cable is wired for color connections. I chased my tail trying to
fix a color monitor that wasn't broken; I was using a monochrome
cable. The connector pinout on your computer probably has separate
composite monochrome and color outputs. Use the right cable and
you will have color.
|
| 1652.2 | | AGNESI::EKLOF | We're everywhere. | Fri Sep 02 1988 17:14 | 11 |
| Re: .1
The composite port on the back of the 2000 is an RCA jack. Pretty
hard to screw up the cable to that. You can buy composite connectors that
plug into the RGB port, and give you colour composite output. My composite
jack gives monochrome output. If Paul is getting colour, there are three
likely explainations. They put the chroma signals back in the composite
jack, he's using a colour composite adapter plugged into the RGB port of
his Amiga, or he's halucinating.
Mark
|
| 1652.3 | COLOR COLOR COLOR!!! | MTWAIN::MACDONALD | WA1OMM 7.093/145.05/223.58 AX.25 | Fri Sep 02 1988 17:34 | 6 |
| Try it guys! Connect the composite jack from the back of your A2000
to the video input of your VCR (can't imagine any Amiga owner without
a VCR). Press record for a few minutes. Then, play it back and tell
me if it looks like B&W or color.
(George? Planning on buying a mean machine real soon?)
|
| 1652.4 | I thought only the A500 had MONOCHROME composite? | ANT::SMCAFEE | Steve McAfee | Fri Sep 02 1988 18:53 | 0 |
| 1652.5 | They must have wised up | TLE::RMEYERS | Randy Meyers | Fri Sep 02 1988 21:04 | 26 |
| The Amiga 2000 model A did not have a composite output jack. The
Amiga 2000 model B has a composite output jack.
That jack, and the jack on the Amiga 500, is [was?] monochrome.
Says so the the technical book. My Amiga 2000 (rev 4.2) does produce
monochrome.
The reason Commodore changed the color composite out on a Amiga 1000
to a black and white for the Amiga 500 and B2000 was to allow for
cheap monitors. They thought it would be a selling point to be able
to say, "Look, you can get a cheapie monochrome long persistence
composite monitor for about $100 and use the interlaced display modes
for text processing." Monochrome was output rather than color so
that shades of green (say) wouldn't look exactly like shades of
blue on the monochrome monitor. Commodore remapped the various
colors in the palette into different shades of gray.
So far, everyone was thought this to be a bad idea. The single
business application that the Amiga completely "owns" (desktop
video) requires that you have composite color out. It's embarrassing
to require a $50 converter when you claim to be designed with that
application in mind. (Not as embarrassing as the $1000-$2000 video
boards required by the Mac II to do the same thing...)
If Paul's Amiga is producing color (I guess we should believe him!),
I guess Commodore changed its mind and "fixed" the motherboard.
|
| 1652.6 | | BAGELS::BRANNON | Dave Brannon | Fri Sep 02 1988 22:41 | 20 |
| my A2000 is plugged into the back of my VCR, it only does monochrome,
just like the docs say. Congrats if yours does color. I've been
hoping CBM would realize sometime soon how bad that idea was.
I haven't tried videotaping it.
what rev of the motherboard do you have?
Anybody else out there with an A500 or A2000 that does color composite
video?
I believe the question was asked on Usenet if it was possible to
do a modification to the A500/A2000 to get color composite instead
of the monochrome. The response was something like not easy or
worth doing since it would take a lot of hacking, and for $50 you
could get it from the RGB port.
-dave
|
| 1652.7 | | STC::HEFFELFINGER | Give my body to science fiction. | Sat Sep 03 1988 02:11 | 4 |
| My 2000 is rev 4.4. I don't have it connected to a VCR, but through
the composite input of my KV-1311CR it looks pretty grey to me.
Gary
|
| 1652.8 | Another vote for the asylum | LEDS::ACCIARDI | Heisenberg may have slept here | Sat Sep 03 1988 03:29 | 5 |
|
I agree. Poor Paul has gone insane. Should we pass the hat for
his family? My rev 4.2 A2000 is clearly grey on my Sony KV1311.
Ed.
|
| 1652.9 | | BAGELS::BRANNON | Dave Brannon | Mon Sep 05 1988 01:24 | 8 |
| RE: the price of color :-)
The Memory Location sells the Cltd CVIEW (RGB to composite) for
$29. Not too expensive... but it doesn't allow you to connect
a RGB monitor and your VCR at the same time. I'm going to wait
until genlocks get cheaper to add color composite to my 2000.
-dave
|
| 1652.10 | neither color nor monochrome | SAUTER::SAUTER | John Sauter | Tue Sep 06 1988 12:37 | 15 |
| In response to this topic I tried the "mono" jack on my A2000 for
the first time last night. I connected it to my shiny new super-VHS
VCR, which is monitored by my similarly-new monitor. I could see
color fringes while my son played F/18, but not real color. To
achieve a decent picture I turned the color control all the way
down, getting a monochrome picture. I also turned the brightness
all the way down.
I also tried connecting to the video output of the Sony KV-1311CR,
which is fed from the RGB connector, but the Sony apparently doesn't
convert its RGB input to video output.
I recently got a camcorder, so I am considering a genlock. It's
nice to hear that they have video output.
John Sauter
|
| 1652.11 | | MTWAIN::MACDONALD | WA1OMM 7.093/145.05/223.58 AX.25 | Wed Sep 07 1988 18:22 | 1 |
| Okay .. who wants a demo tape?
|
| 1652.12 | | BAGELS::BRANNON | Dave Brannon | Wed Sep 07 1988 21:31 | 10 |
|
hmmm.... you don't suppose he could be right :-) ......
If so, then maybe there is a way to modify an A2000 to do color
composite (assuming that his color composite is due to a manufacturing
mistake).
any hardware hackers want to check this out?
-Dave
|
| 1652.13 | VR241-A and Color Composite Video | DPDMAI::ANDERSONA | | Sun Oct 23 1988 15:03 | 113 |
|
On my Amiga 500 I am using a VR241-A monitor, this uses the Analog
RGB signals from the Amiga. The C View 1 NTSC RGB to Composite
adapter also uses the Analog RGB signals from the Amiga. The
VR241-A is designed to drive another monitor if it is placed in
high impedance mode. I have come up with the following cable
to drive a C View from the VR241-A. First I will list the pins
that are used on the C View.
Pin 1 XClk This pin has a solder connection but
I cannot see an etch it could be for
physical support.
Pin 3,4,5 Analog Red, Green, and Blue.
Pin 10 CSYNC
Pin 12 VSYNC I did not need to use this wire.
Pin 13 GNDRTN without this I only got Monochrome Video.
Pin 15 C1 Clock Out
Pin 20 Gnd
Pin 22 +12 Volts
The C View comes packaged in a DB25 hood so it is small enough
to tuck away beside your monitor. I never wired the XCLK
signal; in looking at the C View I could not locate an etch
going to this pin. It may be for physical support of the
circuit board. The C View only supported one gnd pin (20). To
ground all of the shields I added a jumper to the C View from
pin 19 to 20 and ran all of the cable shields to pin 19. you
could jumper all of the gnd connectors together if you like.
But it could be close quarters under the C Views hood. Also I
originally ran a wire from the Amiga VSync to the C View. But
it broke off and I didn't notice it until after I had it
working. So I guess it wasn't necessary. Some day I'll play
around with it to see what effect it has. The GNDRTN signal is
necessary, without it I only got Mono Video out of the C View.
On the VR241-A place the impedance switch in high and the SYNC
switch in external. You will get a signal if the impedance
switch is in the 75 ohm position but the signal will be lower
and the video quality will be poor. The output signal is only
about .75 V peek to peek, as opposed to the full 1.5 V peek to
peek you get in the high impedance position. The picture on
your monitor will also increase in brightness when the switch
is placed in high impedance.
If you use a DB25F to make the C View connector remember ignore
pins 13 and 25 when installing the wires and then pin 14
becomes the new pin 13. And if you use a DM25M for the Amiga
Video connector you have to hack saw off pins 13 and 25.
Modified DB25M
or
VR241-A High Impedance BNC DB23 M Amiga
Video
Sync <---------------------------------- 10 CSYNC
---
|__ 19 Shield
Red <---------------------------------- 3 Analog Red
---
|__ 16 Shield Red
Green <---------------------------------- 4 Analog Green
---
|__ 17 Shield Green
Blue <---------------------------------- 5 Blue
---
|__ 18 Shield Blue
+ ------------- 13 GNDRTN
|
| +------------ 15 C1
| |
| | +---------- 20 Gnd
| | |
| | | +-------- 22 +12 Volts
| | | |
| | | |
| | | | C View
| | | | DB25F or DB23F NTSC
| | | | Comp.
| | | +-------- 22 +12 Volts
| | |
| | +---------- 20--------+ Gnd
| | |
| +------------ 15 C1 |
| |
VR241-A 75 Ohm BNC +-------------- 13 GNDRTN |
|
Sync <----------------------------------- 10 Csync | <--Jumper
--- | Installed
|__ 19 Sheild-+ on CView
| to Provide
Red <---------------------------------- 3 Red | an extra
--- | Gnd Pin
|_____________|
Green <---------------------------------- 4 Green |
--- |
|_____________|
|
Blue <---------------------------------- 5 Blue |
--- |
|_____________|
The C View is $35.00 and the parts for the cable from radio
Shack ran about $25.00 so for under $60.00 you can get Color
Composite Video from your Amiga. This will hold me until
genlocks get cheaper. I Video taped DOC and took it to the
office it blew their socks off. Now I need a TV and VCR that
supports Stereo.
Have fun!
Alan
|
| 1652.14 | Trouble with .13 | DPDMAI::ANDERSONA | | Thu Oct 27 1988 02:07 | 7 |
| I started having a few problems with the setup as described in .13.
It will drop the color after 10 to 15 minutes. I will have to do
some more work on it when I get some time. Right now work is making
serious inroads into my play time.
Alan
|
| 1652.15 | A little late but still trying | CSC32::A_ANDERSON | DTN 592-4170 NSU/VAX | Tue Jul 17 1990 16:46 | 13 |
| Finnaly I got around to working with the cable setup in .13. This time
I am using a A520 RF modulator. This so far seems to be working ok.
More testing is needed. But I can connect a Maganvox Camcorder to the
A520 Composite Video and the color holds steady for about 10 minutes of
the DOC demo. Waiting to Video Titler 1.5 to get here so I can give it a
good workout. Shure beats squinting thru the B/W vewfinder of the
Camcorder. Also I can connect a TV up to the RF out of the Camcorder.
Cheap but workable.
Alan
|