[HN Gopher] The IBM 5153's True CGA Palette and Color Output (2022)
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The IBM 5153's True CGA Palette and Color Output (2022)
Author : susam
Score : 50 points
Date : 2023-10-26 19:33 UTC (3 days ago)
(HTM) web link (int10h.org)
(TXT) w3m dump (int10h.org)
| accrual wrote:
| I find this work fascinating. I wonder if it'd be possible to
| create a test suite for the IBM PC to cycle through various
| colors and patterns, then distribute it to known IBM 5153
| (monitor) owners and have them capture the output in best
| possible conditions and upload the results.
|
| The results could include the video file and camera used. Then,
| iterate over the results programmatically and try to determine an
| average from them. Then the author's work could be normalized
| across many different revisions of the CRT from different
| conditions, instead of working from a single sample monitor. Then
| compare this with the canonical and revised colors.
|
| I'm sure the differences would be barely noticeable, but just
| kind of wacky retro experiment I'd love to participate in.
| qingcharles wrote:
| You'd have to use a photographic color calibration swatch in
| each photo to make sure you had a reference, though.
| doubloon wrote:
| nice link
|
| this is as close as possible to i will ever get to understanding
| how the older generation feels about cars from the 1950s.
|
| it's not even so much about the tech it's about the memories i
| have from being young, and the process of discovering that some
| of the mysteries of the man made world do actually have answers.
| Lerc wrote:
| I always liked looking at this old tech with a what-might-have-
| been viewpoint using the technical constraints of the time
| combined with the knowledge and hindsight available today.
| Without a time machine it's essentially a pointless endeavour,
| but nevertheless rather fascinating.
|
| The Gigatron https://gigatron.io/ is a really good example of
| people making something pretty amazing using late '70s to early
| '80s tech.
|
| I spent quite some time trying to figure out what palette I
| could make using just 4 digital lines, resisters, and diodes.
| This is what I ended up with,
| https://fingswotidun.com/images/4bitPal_arduino.jpg Maybe I'll
| make my own 16 colour computer one day with it.
| SoftTalker wrote:
| I would guess that the original PC color palette was selected to
| match or at least be similar to the colors on the 3270-style
| mainframe terminals.
| treve wrote:
| Very excited to learn that 'brown' was special-cased. Back in my
| high-school Turbo Pascal days I always thought it felt a bit like
| the odd-one out
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