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19 votes

Why did the Amiga 2000 only produce grayscale on its composite output?

I don’t know that we’re going to do much better than speculation here, but assuming the same reason as the Acorn machines amongst others: if you offer monochrome by composite out then almost any ...
Tommy's user avatar
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17 votes
Accepted

Was PAL or NTSC encoder IC a critical component in early video games?

The PAL video encoder was not a bottleneck of any kind. It is left out because the unit is not a PAL model, but a SECAM model, which needs a different kind of encoder. So the chip is not needed and it ...
Justme's user avatar
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15 votes
Accepted

On the video signal generated by the ULA of the ZX81

That portion of the video signal is generated directly by the ULA; early ZX81s just don't generate a back porch, which was seemingly good enough for the majority of televisions but problematic enough ...
Tommy's user avatar
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14 votes

Why did the Amiga 2000 only produce grayscale on its composite output?

As the Amiga was sort of high performance serious computing device, it was assumed that it is being used with an analog RGB color monitor or in high-res monochrome on standard video monitors and TVs, ...
Justme's user avatar
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12 votes
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Sending video to Telerate 9" Green Monitor

It is unsure if this will help, but it might just be the monitor after all. The termination switch on the monitor is incorrect. It must be set to 75 ohms. It is currently set to no termination which ...
Justme's user avatar
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9 votes

C128D shorted Composite and Ground

The C128D modulator uses 5V for power supply, and the composite output (pin 4) is driven with luma signal via an emitter follower and a 120 ohm resistor, and with chroma signal via an emitter follower ...
Justme's user avatar
  • 34.3k
9 votes

Sending video to Telerate 9" Green Monitor

If you can see the test screen from the converter, the converter is generating a signal the monitor understands, but the converter does not understand the input from the computer. You are most likely ...
Thorbjørn Ravn Andersen's user avatar
8 votes

Atari800XL Composite video black and white problem

Based on the information provided, I'd recommend the following first steps: Clean the monitor jack on the 800XL using contact cleaner. Inspect the monitor jack while inserting and removing the cable ...
Brian H's user avatar
  • 60.9k
8 votes

Is an LG 43UK6200PLA television set supposed to be able to display video output from a Nintendo 64?

The spec you posted says the TV has composite in (i.e., your yellow connector from the Nintendo). The manual at that web site shows composite video going to the leftmost phono socket, labelled Video/Y....
dave's user avatar
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7 votes
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Sony PVM Connections / Composite Signale

There are four groups of connectors (Line A, Line B, RGB/Component, and Ext Sync), and each group should be treated as a whole. As it's a monitor, I assume you have an "out" for each "...
dirkt's user avatar
  • 28.4k
7 votes

What cables do I need to connect an Atari 130XE to a monitor and a television set?

The 130XE has two display outputs, as you've probably already seen. The easiest one to use is a VHF/UHF TV output, which should go to a TV that supports analogue TV standards. It should be ...
Chromatix's user avatar
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6 votes

Is an LG 43UK6200PLA television set supposed to be able to display video output from a Nintendo 64?

The manual for the TV only lists 480i/p and higher resolutions as explicitly supported over component (which likely translates to support over composite as well). Most Nintendo 64 games ran at 240p, ...
Maciej Stachowski's user avatar
6 votes

Can I rewire a compact Macintosh SE or other compact Mac to play RCA Video?

No. The Mac SE vertical and horizontal scan frequencies (designed into both the CRT yoke and the analog sweep generator circuits) are different from NTSC (and PAL) composite timing. And the Mac SE ...
hotpaw2's user avatar
  • 8,287
6 votes

Can I rewire a compact Macintosh SE or other compact Mac to play RCA Video?

No, for many reasons. The yellow connector that you are talking about is called composite video. It's called "composite" because it combines several signals: vertical synchronization, ...
DrSheldon's user avatar
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5 votes

Sending video to Telerate 9" Green Monitor

The monitor will display the HDMI/AV converters test screen, but not my actual computer signal. Guess: The timing for your actual computer signal is wrong, probably because the HDMI input your are ...
dirkt's user avatar
  • 28.4k
4 votes

Vintage computer composite graphics

I'd suggest using a chain of discrete counters clocked with 4x chroma and generating a composite signal directly from that, using resistors as a crude DAC for the output stage. If e.g. you have use a ...
supercat's user avatar
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4 votes
Accepted

Will US Amiga 500 work in UK with UK power supply?

An unmodified Amiga 500 provides two outputs: analogue and digital RGB through its DB23M connector monochrome composite through its RCA connector Colour encoding is identical in both PAL and NTSC ...
Stephen Kitt's user avatar
4 votes

Sony PVM Connections / Composite Signale

So when I have a Composite Cable with Video/L/R means, I put the cable into Video IN (Line A) and Audio In (Line A+B)? It looks to be mono audio only so you can either get an adapter that connects ...
Graham Nye's user avatar
4 votes

Is a S-VIDEO-to-RCA cable worse video signal quality than an S-VIDEO-to-SCART cable?

So let's sort out the way all those signals work. RGB uses three lines, R for the "red" signal, G for the "green" signal, and B for the blue signal. Each signal's amplitude ...
dirkt's user avatar
  • 28.4k
3 votes

Atari800XL Composite video black and white problem

from: https://www.facebook.com/groups/840633719349481/permalink/4031384456941042 The R38 potentiometer it's has to be replaced. Edit: the potentiometer was replaced (and also a "hack" on ...
Enrique San Martín's user avatar
3 votes
Accepted

Nintendo Gamecube connected to TV via Playstation 2 composite cable

It was pure coincidence that the connector even fitted enough and that composite video pin and one of the ground pins, maybe through metal shield, happened to match. Worst thing that could have ...
Justme's user avatar
  • 34.3k
2 votes

Is an LG 43UK6200PLA television set supposed to be able to display video output from a Nintendo 64?

My previous TV had 1 combo component/composite input (basically, if you wanted composite (RCA, the yellow/white/red), you'd plug in white and red to white and red and yellow (video) went into the ...
Foon's user avatar
  • 1,099
2 votes

How can the composite out of an Apple II be disabled?

Partial answer: Having looked at the manual, the only connection is a two-wire cable to video aux. They also say that any composite monitor connected to the internal Apple video must be NTSC composite ...
dirkt's user avatar
  • 28.4k
2 votes

What cables do I need to connect an Atari 130XE to a monitor and a television set?

The Atari XL/XE machines (“all but 400, NTSC 600XL, SECAM 800XL/130XE/XEgs”, according to the FAQ) have a video port broadly compatible with the Commodore 64. The connector (180° 5-pin DIN) and ...
scruss's user avatar
  • 21.7k
2 votes

Is a S-VIDEO-to-RCA cable worse video signal quality than an S-VIDEO-to-SCART cable?

If you can get a converter to render either S-video or SCART to component or HDMI, those should give the best possible quality. Converting S-video to composite would be a definite downgrade, though ...
supercat's user avatar
  • 37.5k
2 votes

C128D shorted Composite and Ground

Retrograde has done a good analysis of the available schematics. However, there is a more general analysis that should apply to nearly any retro computer. Composite video outputs are designed to have ...
jpa's user avatar
  • 1,715
2 votes

Why did the Amiga 2000 only produce grayscale on its composite output?

In simplest terms the Amiga 2000 only outputs greyscale on its composite output because it's nearly architecturally identical to the the Amiga 500 (Rev 5) it's based on¹ which also only outputs ...
mnem's user avatar
  • 4,555
1 vote

Why did the Amiga 2000 only produce grayscale on its composite output?

If a machine outputs pixels at a dot rate precisely 2x chroma (as is done in the 320-pixel modes of the Atari 8-bit computers, IBM CGA, or Amiga, as well as the 280-pixel modes of the Apple II), ...
supercat's user avatar
  • 37.5k
1 vote

Vintage computer composite graphics

A standard VDC chip of the early eighties is the Motorola 6845. While originally intended not for pixel-addressable, but rather character-addressable frame buffers, it can easily be tricked into ...
tofro's user avatar
  • 35.5k

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