Yellow Is Orange Not Yellow

Yellow Is Orange Not Yellow - CLOSED

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First post, by jennifer3

Posted on 2015-01-19, 11:51

jennifer3 Offline

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Rank: Newbie
Posts: 9
Joined: 2015-01-19, 11:23

Hello Everyone,

This is my first time on this forum and I don't even know if this question belongs here. If not, would someone please direct me?

I'm running a program I wrote under Turbo C under DOSBox 0.74 under Debian Linux 6 (Wheezy) with MATE. I would expect the following code:

printf("\x1b[33YELLOW\x1b[37")

to output the word YELLOW in yellow to the screen. However, it comes out orange looking. (\x1b[33 is according to the ANSI.SYS standard.)

I'm certain this is a development-level situation, not an installation one. But what should I do about it?

I tried downloading the source and looking at it but it didn't make much sense. It was mostly header files and scripts of some sort -- nothing that looked like emulator code that I could see. (I have never successfully built a binary from downloaded source.)

Jennifer

Last edited by jennifer3 on 2015-02-17, 10:44. Edited 1 time in total.

Reply 1 of 3, by Qbix

Posted on 2015-01-19, 13:00

Qbix Offline

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Rank: DOSBox Author
Posts: 11233
Joined: 2002-11-27, 14:50
Location: Fryslan

Start reading here:
Re: 40 Column Text Mode Issues

Basicly it is yellow on the videocard, but a period correct monitor has a special circuit that changes it to orange/brown.

Water flows down the stream
How to ask questions the smart way!

Reply 2 of 3, by jennifer3

Posted on 2015-01-21, 16:18

jennifer3 Offline

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Rank: Newbie
Posts: 9
Joined: 2015-01-19, 11:23

Okay, thanks.

Reply 3 of 3, by NewRisingSun

Posted on 2015-02-12, 17:51

NewRisingSun Offline

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Posts: 906
Joined: 2005-09-02, 02:26

You're also using incorrect ANSI code. First, you missed the m after the number. Second, as Qbix explained, "yellow" without intensity is brown on RGBI implementations, as explained in the RGBI palette section of Wikipedia's Color Graphics Adapter article. Therefore, to see yellow, you must specify the intensity text attribute along with the color attribute:

1<ESC>[33m So-called yellow without intensity is brown on PCs.
2<ESC>[1;33mTo get actual yellow, you must select the intensity attribute.
3<ESC>[0;37mBack to normal...

If you find a file that produces yellow without the 1; part, it's because the intensity attribute was set by a previous definition.

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