RGB-video.
ZXNet echo conference «hardware.zx»
Hello Dendy
Most likely the RGB colors and synchro-mix are displayed - try using scart.
Hello Sinus
2 Dendy
Until you give me a photo of the board, you will spend a long time figuring out where it is and what it has.
I have already explained how to connect. Take a photo of the board for identification.
Hello, All
Hello! I'm just getting started with Spectrum. Bought for a penny
machine from the company "A/O OVI-MINI" - 64 kilobytes of memory, 32 KB BIOS, processor
KR1638VM1. The first task is to connect it to the TV. And there is on it
five-pin connector (DIN-5), the inscription 'RGB-video' next to it, all five
contacts in the connector are used, wiring is soldered to the ring itself, it is connected to ground
is. Please explain how to connect this connector to a regular one
"tulip".
Hello, goodboy
if the black and white image suits you, then you can R G B and sync via
connect the tuning shortcuts and submit it all to the video.
The 32k ROM only bothers me, because in the usual 48 spec there are 16k of them.
Or maybe it’s not baked at all ;)?
Hello Dendy
:)
Here is [http://www.nedopc.com/PALCODER/palcoder.php] the first one that caught my eye
link. You can do it yourself, or you can order a ready-made device.
Hello Sinus
I wonder what resistors should be used, and where the circuit is on the Internet
RGB - RCA adapter. I search and search in Yandex - I come across advertisements.
Hello jdigreze
Den> I wonder what resistors should be used and where on the Internet
Den> is the RGB - RCA adapter circuit. I search and search in Yandex - all the time
Den> advertisement comes across.
I wrote on the phantom forum...
Hello Dendy
Den> My Spectrum is an EXACT COPY of the original ZX Spectrum-48
Den> model 1982.
if ULA is implemented using Russian parts, then it is no longer an exact copy, but one of
clones :-))
Hello Dendy
Den> My Spectrum is an EXACT COPY of the original ZX Spectrum-48
Den> model 1982. Only on Russian parts.
Curtain :v2_lol:
In short, sir, take a photo/scan of the board.
The original spec finally has a color RF output.
Hello fan
My "Spectrum" is an EXACT COPY of the original ZX Spectrum-48 model 1982
year. Only on Russian parts. And the fact that the ROM chip is 32 kilobytes -
if a 16 kilobyte program is written into a 32 kilobyte ROM, it
will work. What's the video output on the original ZX?
Hello Dendy
Den> resistors need to be used:
Den> to red -- 1K
Den> to green -- 2K
Den> to blue -- 3.9K
Den> That's it, and not 100 Ohms at all.
By and large, it doesn’t matter - the computer usually already has resistors,
Signals are not collected directly from the microcircuits.
Den> But I'm not sure. Suppose I launch a simple one on the Spectrum
Den> program,
Den> coloring the entire screen red. How will the voltage change
Den> exit?
If you give coloring commands (the easiest way is BORDER) with parameters 1
(BLUE), 2 (RED), 4 (GREEN), then on the corresponding contact the average (for
period of time) the tension will increase.
Den> 3 -- red
Den> 4 -- green
Den> 5 -- blue
Why not:
3 -- green
4 -- blue
5 -- red :)
Den> I'll take a photo of the board.
It’s high time to do it, not to “shamanize”!
Hello fan
The day before yesterday I bought a multimeter. I measured the voltage at the Spectrum ports.
The computer shows signs of life:
RGB video
1 -- 2.24 V
2 -- 0.017 V
3 -- 0.702 V
4 -- 0.682 V
5 -- 0.682 V
The earth is a ring.
Why is there such a small voltage on the second contact?
TAPE OUT:
2 -- ground
3 connected to 5 -- 1.187 V
When I began to actively press the keys, the voltages on the video output began
fluctuate, especially on pin 4: plus or minus five millivolts. Assumption:
1 -- sound
2 -- synchronization
3 -- red
4 -- green
5 -- blue
But I'm not sure. Let's say I run a simple program on the Spectrum,
turning the entire screen red. How will the output voltage change?
As for the adapter circuit for the "RGB-tulip" - I found the TV006 program. This
The program is designed to connect a VGA video card (also RGB) to a TV.
It changes the clock signal so that the video card becomes
SCART compatible. I wasn't interested in this before, but in the documentation for
The program indicates which resistors should be used:
to red -- 1K
to green -- 2K
to blue -- 3.9K
That's it, and not 100 Ohms at all.
I'll take a photo of the board.
Hello spensor
spe> If you give coloring commands (the easiest way is BORDER)
Still, it is better to have both BORDER and PAPER, then the level of the corresponding signal will be
permanent.
Hello fan
Den> RGB-video
Den> 1 -- 2.24 V
Den> 2 -- 0.017 V
Den> 3 -- 0.702 V
Den> 4 -- 0.682 V
Den> 5 -- 0.682 V
Den> The earth is a ring.
I would make a slightly different assumption:
1. Since the start screen of the spec is almost all white: 345 is RGB
2. There is no sound, so 2 is sound
3. 1 contact is synchro
Hello spensor
You can at least believe that the first contact sends sound, and the
the second - a synchronization signal?
Hello, do_se
do_> 1. Since the start screen of the spec is almost all white: 345 is RGB
do_> 2. There is no sound, so 2 is sound
do_> 3. 1 contact is synchronization
I support the assumption.
Hello Dendy
Den> You can at least trust me that the first contact sends
Den> sound, and on the second - a synchronization signal?
If I were you, I would check everything directly with the TV. Solder to pin 20
SCART wire, connect GND Speck to GND Scart and poke the wire along
contacts. You can determine the synchronization immediately: you will see a “stable” image (rather
In total, the picture of the Speck screen will even be visible due to interference). RGB will be
give a lot of slanting stripes on the screen (due to lack of synchronization) the remaining wire
apparently sound.
You can first find a synchro, solder it tightly to the 20th leg of SCART, then any
From the SCART color inputs, find the RGB outputs of the spec.
RGB who is XY can be calculated using the software method...
Hello Dendy
Den> You can at least trust me that the first contact sends
Den> sound, and on the second - a synchronization signal?
To check the sound, you can connect a speaker to this pin.
Hello, do_se
do_> I would make a slightly different assumption:
do_> 1. Since the start screen of the spec is almost all white: 345 is RGB
do_> 2. There is no sound, so 2 is sound
do_> 3. 1 contact is synchronization
Still, sound is transmitted through the first contact: even if sound vibrations in
not at the moment, the audio contact is always supplied with a relatively high
voltage - tested on a tape recorder and other audio equipment. By the way, on
The voltage in the "TAPE OUT" connector is also high (1.1 V), although at the moment there is nothing
It is not saved to the tape recorder. As for the second contact - 17 millivolts - this is
very little, almost nothing. Maybe it's earth and sync is mixed with blue
signal on the fifth contact. I don’t have a TV with a SCART connector, but the data
Your advice is enough to figure out the connection yourself. More
no questions.
Hello Dendy
RGB-RCA cable made. I connected contacts 3,4,5 through 1K resistors. Got it
black and white image. Probably the synchronization signal has already been added to one
from color signals. The letters are visible.
1992 * Zx Spectrum * Turbo +
Questions have arisen again...
As soon as I loaded the NinjaMasters game, the pandemonium began. In the picture
emulator.jpg compares the type of game in the emulator and the type of game on the real one
"Spectrum". The same applies to all games containing graphics: all
mixed, only when I press "RESET" do I see a clear picture for half a second.
On the contrary, text programs (for example, Assembler, Binhex) are executed
ok.
On the TV, oddly enough, the image turned out worse than on the TV tuner:
clear, but runs from bottom to top continuously.
The two pictures attached to the message complement what was said.
File: Loadtape.jpg http://zx.pk.ru/attachment.php?attachmentid=2804
File: Bomber.jpg http://zx.pk.ru/attachment.php?attachmentid=2803
Hello Dendy
Den> runs from bottom to top continuously.
what did you want :)
maybe you have a 100Hz TV :)
By the way, many specs have this problem: it’s either dim or running
I solved the problem by simply screwing the spec to the Monica :)
Hello Dendy
Den> RGB-RCA cable made. I connected contacts 3,4,5 through 1K resistors.
Den> Got a black and white image. Probably the synchronization signal is already
Den> added to one of the color signals. The letters are visible.
Try mixing the remaining contacts after 1k there one by one....
Now your TV is trying to synchronize due to the “lack of” color
signals in those places where there should be synchronization.... on fairly “stable” ones
the signal level of the program, this works.... accordingly, in games everything “mows”...
As far as I remember, the picture is especially critical to frame synchronization....
I strongly doubt about mixing synchro with one of the color signals....
I have never come across a video input on a TV where this would be
implemented..... On the TV, sync and color signals are supplied in perfect
different blocks... roughly speaking, color signals are fed directly to the cathodes
kinescope, and sync is supplied immediately after the TV tuner (just to your RCA input) and
is divided into frame and line scan generators....
Hello Dendy
Den> Connected contacts 3,4,5 through 1K resistors
By the way, the specified scheme is needed only for the “first launch”. Resistor values
there must be others (I think you wrote which ones, I don’t remember exactly how many should
be), after mixing you still need to pass the mixture through the emitter follower
for impedance matching with RCA input. If you work as is in
toys will break your eyes...
Hello, do_se
I read that you can use SCART to connect RGB to your TV. Wiring
like this:
RED - 15
GREEN - 11
BLUE - 7
SYNC - 20
AUDIO - 6
+12 V (required!!!) - 16
But this scheme for connecting my BYTE did not help me. Image
It's black and white, but stripes of RGB colors slowly move across the screen. Maybe I
Am I doing something wrong? Where's the BRIGHTNESS?
Hello BYTEMAN
BYT> I read that you can use SCART to connect RGB to the TV.
BYT> The wiring is as follows:
BYT> RED - 15
BYT> GREEN - 11
BYT> BLUE - 7
BYT> SYNC - 20
BYT> AUDIO - 6
BYT> +12 V (required!!!) - 16
BYT> But this scheme for connecting my BYT did not help me. Image
BYT> is black and white, but stripes of RGB colors move slowly across the screen. Maybe
BYT> Am I doing something wrong? Where is BRIGHTNESS?
12V is a control signal by which the TV understands what is needed
switches from the tuner to the low-frequency input, I have it on my TV
forced transfer (from the remote control) to the RGB input, so this signal does not work for me
required.
There are different switching schemes:
1. RGB+Sync, in my opinion, is the most optimal option for connecting a spec. How
I already wrote above, RGB is supplied to the RGB cathodes of the kinescope. Sync is fed to 20
SCART's leg is then allocated to a frame and line generator. None
no further modifications are made inside the TV. From here
picture quality. It could be even better if you submit it separately.vertical and horizontal sync signals directly to the oscillators, but I'm not sure
that this can be realized with modern televisions.
2. Luminance+Sync: from RGB signals by mixing on a resistor matrix
a Luminance signal is obtained, which is then mixed with Sync and fed to 20
SCART's leg. The result will be a black and white picture in which different colors are reflected
different shades of gray. Hence the requirement for the resistor matrix: on
each color must have its own resistor value. I wrote about this earlier, if
make all colors through 1k (as suggested), then the red color is visually nothing
will be different from green or blue.
3. Luminance + Sync + color difference signals. About the same as option 2,
but in addition, color difference signals are also made from RGB, which allow
on the TV decoder to obtain information about the color of a particular point
images. You can encode in PAL, SECAM or NTSC format. In my opinion,
It is best to encode in PAL format in Russia. This is done, for example, by a coder
proposed by Roman (aka CHRV). If your TV only has an RCA input
(tulip), then this is the only way to obtain a color image from Speck,
unless, of course, you stick a blunt hot object into the TV. If the signal from the encoder
modulate with a high frequency, then it will be possible to connect the Spec to the antennaTV input. Using an encoder degrades the picture quality due to
additional transformations in spec and TV. To reduce influences
transformations, you can connect the spec via S-video (Roman’s encoder has it),
unless, of course, there is such an input on the TV.
Hello BYTEMAN
It has already been said in the topics that sometimes RGB TVs are not connected... ;)
And the brightness is usually mixed with the sync...
Hello, do_se
do_> 1. RGB+Sync in my opinion is the most optimal connection option
do_> spec. As I wrote above, RGB is supplied to the RGB cathodes of the kinescope.
do_> Sync is fed to the 20th leg of SCART then allocated to personnel and
do_> string generator. No additional transformations inside
do_> TV is no longer being made. Hence the picture quality. Even better
do_> could be done if you submit frame and line files separately
do_> clock signals directly to the oscillators, but I'm not sure what that is
do_> can be implemented with modern TVs.
I tried connecting this way. Nothing helped. On screen when turned on
+121v green and purple stripes begin to run across the screen one after another.
On the back of the TV it says RGB.
Hello BYTEMAN
BYT> When you turn on +121V, it starts running across the screen
and if you don’t turn on +12, what happens?
By the way, while going through papers at home, I came across a SCART printout that I fished out
somewhere on the Internet, when I soldered SCART for ATM, it says there that for 16
legs, if you apply 0-0.4V, the composite signal will turn on, 1-3V will turn on the RGB signal....
there was no mention of 12V....
PS while I was typing I found it.... http://bercov.h1.ru/scart.html
Hello, do_se
naturally not 12, but a maximum of five, that’s how everything works for me
Hello fan
What should I, a resident of Odessa, do by example?.. I’ll probably be assembling the diagram for a year in
free time. Weeks, if that's all I do... That's at least
These microcircuits, you can get them around, or special ones. Do you need to know the points?
Yes, and does anyone know the presence of the ZX underground in Odessa?