Color Graphics Adapter - Wikipedia
The Color Graphics Adapter (CGA), originally also called the Color/Graphics Adapter or IBM Color/Graphics Monitor Adapter, [1] introduced in 1981, was IBM's first color graphics card for the IBM PC and established a de facto computer display standard.
The CGA color palette: What were they thinking? : …
2014年12月2日 · Replace 0 and 1 with 00 and AA to get the dark CGA colors (except for brown, which they tweaked specially to be more pleasing), or with 55 and FF to get the light CGA colors. The palettes are only four colors, so only two bits.
Colour Graphics Adapter: Notes - seasip.info
2017年10月18日 · This document describes the behaviour of IBM's original CGA, and some clones. The CGA is a colour card. According to the IBM technical manual, it can display on one of: The IBM Color Display (or a compatible CGA monitor) A television-frequency composite monitor; An NTSC television (with an add-on RF modulator)
cga - How did the IBM 5153 color display detect and modify the …
2022年7月27日 · There's a detection circuit that looks roughly like the following, connecting the detector output to ground when RGBI=1100 (low-intensity yellow, or "brown" as I'll call it here) is detected. Otherwise the detector output is left floating (unconnected to anything).
The IBM 5153's True CGA Palette and Color Output - INT 10h
2022年6月11日 · Here's a camera still of the 16 CGA colors as shown on my IBM 5153 (with the contrast knob at the maximum position), right next to our two CGA-to-RGB palettes: the 'canonical' one, and the revised one based on Holden's voltage measurements.
Nerdly Pleasures: IBM's CGA Hardware Explained - Blogger
Brown is the color that will be displayed on IBM's official CGA monitor, the 5153 Color Display, and its later color monitors. It will be the color displayed on the PCjr., Tandy 1000, EGA, MCGA and VGA adapters.
Why the IBM PC’s Early Graphics Used Such Ugly Colors - VICE
2017年7月27日 · But despite that, the unusual palettes of IBM’s CGA (Color Graphics Adapter), the earliest hardware that displayed color graphics on the IBM PC, still have their partisans. CGA could only display...
CGA and the Brown color in IBM 5153 Color Display - Alessio …
In this article we will see how the CGA manage the colors and in particularly the brown and the gray colors. From the CGA graphic card to the CGA compatible monitor (e.g. IBM 5153 Color Display), the color information is carried with 4 signals (4 wires): RED signal: TTL (0-5V) signal.
The Saga of the Color Brown in the Early Years of the PC - Blogger
2023年3月3日 · In this blog entry's main photo, I show the evolution of brown (and intensity) using Trixter's simple CGACAL program. The top left shows yellow and only eight colors because intensity is not implemented. The bottom left shows dark yellow after intensity is added.
Color Graphics Adapter - TheAlmightyGuru
2023年9月19日 · The Color Graphics Adapter (CGA) is a graphics card developed by IBM and released in 1981 alongside the IBM Personal Computer to give them limited color graphics capabilities. It was superseded in 1984 by the Enhanced Graphics Adapter (EGA) which added superior color graphic capabilities.