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Questions tagged [color-display]

For questions specifically regarding video displays in colour.

14
votes
1answer
801 views

How does Apple ][gs hardware dithering work?

I haven't been able to find an easily comprehensible description of the super hi-res, dithered 16-color, 640x200 mode of the Apple ][gs. I can tell from the references I did locate, this is a ...
7
votes
1answer
366 views

On the bbc-micro, a half-size mode 1 screen mode with 16 colours instead of 4 can fit in memory but can the video chip be programmed for it?

Screen Mode 2 on the BBC micro is 160 x 256 with "16"* colours. This uses up 20Kb of memory. Horizontal-rectangular pixels ( 2 x squares each). 4 bits per pixel (0-15 values for 16 colours) Screen ...
9
votes
4answers
2k views

Why aren't each pixel's bits stored sequentially on the SNES?

When storing graphics in a non-sequential/planar format (like the SNES does), converting to an 8-bit value representation requires first accessing multiple bytes (amount depending on bits-per-pixel), ...
6
votes
2answers
272 views

Turning off the color burst

On early color computers, it was possible to add a feature by which you could turn off the color burst output, restricting the display to black and white but making it significantly sharper and ...
3
votes
3answers
649 views

Why not SCART for early color monitors

By the early eighties, it was starting to be considered desirable for computers to have color monitors. Home computers often made do with a TV set and accepted the consequent low resolution, but ...
12
votes
2answers
1k views

Nintendo 64 Color Depth

https://en.wikipedia.org/wiki/Nintendo_64_technical_specifications says that the N64 calculated with 24-bit color, but output 21-bit. However, https://retrocdn.net/images/7/70/...
15
votes
4answers
4k views

Why not one pixel per color clock?

Early home computers and game consoles output video to TV sets. The NTSC color clock frequency is 3.58 MHz. This informed the design of some video systems: http://pineight.com/mw/index.php?title=...
12
votes
1answer
666 views

Why does the C64 have the following palette?

The Commodore 64 has the following fixed palette of 16 colours: (Your palette may vary due to tuning of screen, etc.) What was the reason for this selection of colours? Are these colours ...
9
votes
4answers
1k views

Actual resolution of composite video monitors

Many early computers used TV sets as monitors. With an NTSC TV set, you could really only count on about 200 scan lines of vertical resolution, and for horizontal resolution, maybe 192 color clocks at ...
10
votes
3answers
852 views

Can artifact color mode create 262,144 colors on Amiga OCS?

This is as a follow-up to my previous question on artifact colors and the excellent answers provided there. The images below show a simple example of artifact colors generated using a single bit-...
13
votes
2answers
2k views

Square pixels and TV output

Another question about color computers in the days of CRT televisions! There is a consensus that pixels should be square, and so they typically are on purpose-designed monitors. However, looking at a ...
12
votes
2answers
525 views

Ideal resolution for color computer on NTSC

Suppose you were, in the early eighties, designing a color computer to run on an NTSC TV with a free hand to choose the specifications within the limits of the technology of the time. What would be ...
26
votes
10answers
2k views

Limiting factor on early color palettes

Early color computers typically had a limit of X colors used simultaneously from a palette of Y, a classic example being the Commodore 64 which could do 320x200 monochrome or 160x200 four colors, ...
6
votes
3answers
1k views

Converting from 15Khz RGB to VGA for an 80's Atari Centipede arcade machine?

I have been hunting around to find a replacement flat panel monitor to replace the honking CRT in a 1980's Atari centipede machine. The existing monitor supports 15Khz RGB which is not really ...
10
votes
1answer
450 views

My Compaq Presario CDS 633 outputs color in Windows 3.1 but not in DOS. How can I get color in DOS?

My Compaq Presario CDS 633 outputs color in Windows 3.1, but not in DOS. How can I get color in DOS? I have tried the MODE setting, but it did not change anything. ANSI.SYS also has a LOADHIGH line ...
15
votes
3answers
2k views

With a 15 kHz video signal (240p or 480i), does VGA have any real-world advantage over S-Video?

It's difficult to find a modern LCD monitor that can display a 15 kHz signal through VGA, so I'm wondering if S-Video is just as good when displaying 240p and 480i? I've looked at screenshot and video ...