Questions tagged [vga]
For questions related to VGA signals, sources or receivers
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Understanding the Need for Positive Sync Polarities in Sony PVM Monitors
Understanding the Need for Positive Sync Polarities in Sony PVM Monitors
Note: This post has been edited several times during its lifetime, and some questions may have already been answered.
I'm in ...
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Why does PC video memory base address change depending on video mode?
It is rather well-known that, with VGA-compatible PC video adapters, in black-and-white text modes video memory is available at linear address 0xB0000, in colour text mode at address 0xB8000, while in ...
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Were VGA palette's HSV math properties used in practice?
In "Why were those colors chosen to be the default palette for 256-color VGA?", we've established that 216 of its colors represent a 24x3x3 truncated HSV color space.
This results in an ...
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Why were those colors chosen to be the default palette for 256-color VGA?
Although subjective, I believe I'm not the only one considering default VGA 256 color palette to be hideous and ugly.
What is the story behind this, why were these particular colors chosen?
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RGBI direct connection to VGA display
Theoretically, if I would wire my CGA card output to a proper display using R,G,B,Hsync,Vsync,Ground lines only, I should see something sensible on the screen. I would lose Intesity information, all '...
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What are the blinking rates of the caret and of blinking text on PC graphics cards in text mode?
PC display adapters in text mode usually show a blinking cursor on the screen, often in the shape of a bar appearing under the character. Additionally, text may be made to blink by setting an ...
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Trying To Understand DOS Game Assembly Instructions [closed]
I am trying to understand assembly language instructions, for a DOS Game. I have looked at the following Link :- https://atrevida.comprenica.com/atrtut07.html
reading about how VGA Graphics work in ...
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What is the most accurate way to map 6-bit VGA palette to 8-bit?
AFAIK VGA mode 13h palette has only 64 possible colors (6-bit) per channel.
One obvious way to map those 64 colors to 256 colors is to multiply them by 4 (since 4 * 64 = 256):
8_bit = 6_bit * 4;
This ...
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9 pin D-sub to VGA or USB
I've bought a medical device (Giger MD), which collects data during the patient's exercise and send the data to a computer. An UTP cable connects the device to a 9-way D-SUB female, and that should be ...
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Is it possible to connect a modern monitor to an 1982 electrical typewriter?
A friend of mine has an electrical typewriter Triumph-Adler BSM 100 SC which is roughly from 1982 (as this site says).
The original tube monitor is faded and it's hard to read anything.
The VGA video ...
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How do I stop flickering in mode 13h?
I'm making a small graphics library for MS-DOS 6.22, using mode 13h with Turbo C on VirtualBox.
Recently, I was able to code a small snippet to move a sprite on the screen, using double buffering and ...
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10 pin --> 26 pin VGA controller pinout and Card compatibility with American Megatrends Super Voyager VLB-III
I'm trying to test an old PC which controls a ABB Bomem FTIR Spectrometer (DA&). The internal PC for this instrument is an American Megatrends, Inc. Super Voyager VLB-III ISA Motherboard
https://...
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How do 80x25 characters (each with dimension 9x16 pixels) fit on a VGA display of resolution 640x480?
Due to my limited knowledge of retrocomputing and old CRT displays and graphics cards, I could be making some wrong assumptions in this question. For any wrong assumption you find in this question, I ...
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What PC VGA connector used 2 rows of pins?
I remember that 20 years ago (around the year 2000) I came across a few computers with a weird monitor connector. They weren't old computers, but rather budget mainstream computers of the time period. ...
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Information about a VGA card named PC-601170-R2
This card is made by Colorgraphic Communications in 1988, and has two VGA ports, and works well with a 80486 computer.
I tried to used that with IBM 5150 and other XT clones, but I failed. According ...
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