brown@nicmad.UUCP (Mr. Video) (01/07/88)
I am interested in getting a complete list of the 64 colors available for the EGA compatible display cards. This is what I have been able to get from some software that I use [the manual doesn't give a list of colors] and what I have been able to figure out. I decimal number is used [0-63] for picking the color. I have guessed the it goes: MSB LSB rgbRGB where r=32, g=16, b=8, R=4, G=2 and B=1 and rgb are secondary pins and RGB are primary pins Along the same line, does the RGB connector (IBM connector mode 1) always have 4 pins, ie, RGB and I [intensity]. The other connection of the RGB connector (IBM connector mode 2) has 6 pins used, hence the 64 possible colors. And we also have RGB Analog, which I call RGBA. What I would like to know is what exactly are all the various types of RGB pinouts and what their names are. We have RGB, RGBI and RGBA bantered around, so what exactly is what? Is the 4 pin RGB called RGBI and is the 6 pin RGB just called RGB? Here is the color table as I know it. Could someone please fill in the blanks, or correct same? 0 Black 1 dark blue 2 Dark Green 3 cyan 4 dark red 5 magenta 6 yellow 7 Gray 8 real dark red 9 real blue 10 11 12 13 14 15 16 real dark green 17 18 real green 19 20 21 22 23 24 dark cyan 25 26 27 Blue (really Cyan?) 28 29 30 31 32 real dark red 33 34 35 36 real red 37 38 39 Pink 40 real dark magenta 41 42 43 Dark Blue 44 45 magenta 46 Orange 47 Lavender 48 dark yellow 49 50 51 Light Green 52 Red 53 Magenta 54 Yellow 55 Amber 56 dark gray 57 dark blue 58 Green 59 60 dark red 61 62 63 White The colors with cap first letters are what was listed as the colors with the software. The colors in lower case only are what I have seen or guessed at, based on the binary color combinations. Thanks in advance. -- harvard-\ ihnp4--\ Mr. Video !uwvax.................!nicmad!brown rutgers-/ terminus-/ decvax--/ "... a can of deodorant that measures nine on the Richter scale?"
Usenet_area_"Cs.I.Pc"@watmath.waterloo.edu (01/08/88)
From Usenet: watmath!clyde!rjs
From: rjs@moss.ATT.COM
Newsgroups: comp.sys.ibm.pc
Subject: Re: EGA color palatte
Summary: Color table filled in
Message-ID: <19827@clyde.ATT.COM>
Date: 8 Jan 88 16:55:26 GMT
References: <2310@nicmad.UUCP>
Sender: nuucp@clyde.ATT.COM
Distribution: na
Lines: 121
Mr. Video (brown@nicmad.UUCP) asked about the colors for EGA (in message
2310@nicmad.UUCP). He provided a partial table of the 64 colors. I
found a program on a BBS called KC-PAL (version 1.01) which lets you
look at each of the colors (16 at a time) by specifying the color numbers
for each of 16 rectangles on the screen.
My EGA monitor appears to take two different forms of color input (I'm
just starting to learn this stuff, so the following could be totally wrong).
The first uses 4 TTL signals to specify color. These are Intensity, Red,
Green, and Blue (referred to by Mr. Video as RGBI). The second uses 6 TTL
signals: primary Red, Green, and Blue, and secondary red, green, and blue
(referred to by Mr. Video as RGB). The secondary signals seem to act as
intensifiers of the primary signals. Thus with two signals per phosphor
color you get four levels of intensity for each of the three phosphor colors
(red, green, and blue). These values can be thought of as follows:
Intensity Primary Secondary Appearance
Value Signal Signal
0 off off Phosphor not illuminated
1 off on Phosphor slightly illuminated
2 on off Phosphor normally illuminated
3 on on Phosphor highly illuminated
The KC-PAL program actually reverses the meanings of intensity values
1 and 2 above, but I figured I would give them in the order of apparent
intensity.
I filled in the color table provided by Mr. Video below. I added an
RGB column giving the intensity values for each of the phosphor colors
according to the above chart. My interpretation of the colors is in
parentheses, while Mr. Video's appear as he presented them. I'm not
very good at giving names to the colors I see, so you'll have to bear
with me on this.
Decimal RGB Apparent color
0 000 Black
1 002 dark blue
2 020 Dark Green
3 022 cyan
4 200 dark red (deep red)
5 202 magenta
6 220 yellow
7 222 Gray (dim white)
8 001 real dark red (real dark blue)
9 003 real blue (bright blue)
10 021 (blue-green, mostly green)
11 023 (pale blue)
12 201 (pinkish red)
13 203 (bluish magenta, sorta purple)
14 221 (yellow, slightly greenish)
15 223 (bluish white)
16 010 real dark green
17 012 (slightly lighter than dark blue)
18 030 real green (bright pale green)
19 032 (bright pale blue-green)
20 210 (orange, rust)
21 212 (purple)
22 230 (bright yellow-green)
23 232 (greenish white)
24 011 dark cyan
25 013 (bright blue)
26 031 (bright bluish green)
27 033 Blue (bright cyan, light sky blue)
28 211 (muddy pink)
29 213 (light purple)
30 231 (bright yellow-green)
31 233 (bright bluish-white)
32 100 real dark red
33 102 (blue w/slight purplish tinge)
34 120 (green)
35 122 (bluish white)
36 300 real red (bright red)
37 302 (shocking pink)
38 320 (orangish-yellow)
39 322 Pink (pinkish white)
40 101 real dark magenta
41 103 (bright blue)
42 121 (bluish green)
43 123 (dark sky blue)
44 301 (orangish shocking pink)
45 303 magenta (bright magenta)
46 321 Orange (pale yellow-orange)
47 323 Lavender
48 110 (olive green)
49 112 (slightly purpled blue)
50 130 (bright yellow green)
51 132 Light Green (bright)
52 310 Red (orange)
53 312 Magenta (bright)
54 330 Yellow (bright)
55 332 Amber (yellowish white)
56 111 dark grey
57 113 dark blue (light blue)
58 131 Green (pale green)
59 133 (bluish white)
60 311 dark red (orangish red)
61 313 (bright magenta)
62 331 (muddy yellow)
63 333 White (bright)
Color values 0-7 above account for the Intensity signal off in the RGBI
connector, while values 56-63 account for the Intensity signal on.
For more information on the KC-PAL program, contact:
Kent Cedola
2015 Meadow Lake Court
Norfolk, VA. 23518
or look for it on a BBS near you. I think Mr. Cedola is using KC_PAL as
a demo program in order to advertise the availability of a graphic library
for Microsoft C which he has developed.
Robert Snyder
{clyde|ihnp4}!moss!rjs
Disclaimer: I don't know Mr. Cedola or his advertised products. I am not
representing the opinions of AT&T or any other entity besides myself
in this note.
--- via UGate v1.6
* Origin: watmath (221/163)rjs@moss.ATT.COM (01/09/88)
Mr. Video (brown@nicmad.UUCP) asked about the colors for EGA (in message
2310@nicmad.UUCP). He provided a partial table of the 64 colors. I
found a program on a BBS called KC-PAL (version 1.01) which lets you
look at each of the colors (16 at a time) by specifying the color numbers
for each of 16 rectangles on the screen.
My EGA monitor appears to take two different forms of color input (I'm
just starting to learn this stuff, so the following could be totally wrong).
The first uses 4 TTL signals to specify color. These are Intensity, Red,
Green, and Blue (referred to by Mr. Video as RGBI). The second uses 6 TTL
signals: primary Red, Green, and Blue, and secondary red, green, and blue
(referred to by Mr. Video as RGB). The secondary signals seem to act as
intensifiers of the primary signals. Thus with two signals per phosphor
color you get four levels of intensity for each of the three phosphor colors
(red, green, and blue). These values can be thought of as follows:
Intensity Primary Secondary Appearance
Value Signal Signal
0 off off Phosphor not illuminated
1 off on Phosphor slightly illuminated
2 on off Phosphor normally illuminated
3 on on Phosphor highly illuminated
The KC-PAL program actually reverses the meanings of intensity values
1 and 2 above, but I figured I would give them in the order of apparent
intensity.
I filled in the color table provided by Mr. Video below. I added an
RGB column giving the intensity values for each of the phosphor colors
according to the above chart. My interpretation of the colors is in
parentheses, while Mr. Video's appear as he presented them. I'm not
very good at giving names to the colors I see, so you'll have to bear
with me on this.
Decimal RGB Apparent color
0 000 Black
1 002 dark blue
2 020 Dark Green
3 022 cyan
4 200 dark red (deep red)
5 202 magenta
6 220 yellow
7 222 Gray (dim white)
8 001 real dark red (real dark blue)
9 003 real blue (bright blue)
10 021 (blue-green, mostly green)
11 023 (pale blue)
12 201 (pinkish red)
13 203 (bluish magenta, sorta purple)
14 221 (yellow, slightly greenish)
15 223 (bluish white)
16 010 real dark green
17 012 (slightly lighter than dark blue)
18 030 real green (bright pale green)
19 032 (bright pale blue-green)
20 210 (orange, rust)
21 212 (purple)
22 230 (bright yellow-green)
23 232 (greenish white)
24 011 dark cyan
25 013 (bright blue)
26 031 (bright bluish green)
27 033 Blue (bright cyan, light sky blue)
28 211 (muddy pink)
29 213 (light purple)
30 231 (bright yellow-green)
31 233 (bright bluish-white)
32 100 real dark red
33 102 (blue w/slight purplish tinge)
34 120 (green)
35 122 (bluish white)
36 300 real red (bright red)
37 302 (shocking pink)
38 320 (orangish-yellow)
39 322 Pink (pinkish white)
40 101 real dark magenta
41 103 (bright blue)
42 121 (bluish green)
43 123 (dark sky blue)
44 301 (orangish shocking pink)
45 303 magenta (bright magenta)
46 321 Orange (pale yellow-orange)
47 323 Lavender
48 110 (olive green)
49 112 (slightly purpled blue)
50 130 (bright yellow green)
51 132 Light Green (bright)
52 310 Red (orange)
53 312 Magenta (bright)
54 330 Yellow (bright)
55 332 Amber (yellowish white)
56 111 dark grey
57 113 dark blue (light blue)
58 131 Green (pale green)
59 133 (bluish white)
60 311 dark red (orangish red)
61 313 (bright magenta)
62 331 (muddy yellow)
63 333 White (bright)
Color values 0-7 above account for the Intensity signal off in the RGBI
connector, while values 56-63 account for the Intensity signal on.
For more information on the KC-PAL program, contact:
Kent Cedola
2015 Meadow Lake Court
Norfolk, VA. 23518
or look for it on a BBS near you. I think Mr. Cedola is using KC_PAL as
a demo program in order to advertise the availability of a graphic library
for Microsoft C which he has developed.
Robert Snyder
{clyde|ihnp4}!moss!rjs
Disclaimer: I don't know Mr. Cedola or his advertised products. I am not
representing the opinions of AT&T or any other entity besides myself
in this note.mason@tc.fluke.COM (Nick Mason) (01/13/88)
Hi. I also have been working with the IBM-EGA card. In article <2310@nicmad.UUCP> you write: > > MSB LSB > rgbRGB where r=32, g=16, b=8, R=4, G=2 and B=1 > and rgb are secondary pins and RGB are primary pins The above is correct. > >Along the same line, does the RGB connector (IBM connector mode 1) always >have 4 pins, ie, RGB and I [intensity]. The other connection of the RGB >connector (IBM connector mode 2) has 6 pins used, hence the 64 possible >colors. And we also have RGB Analog, which I call RGBA. What I would >like to know is what exactly are all the various types of RGB pinouts >and what their names are. We have RGB, RGBI and RGBA bantered around, >so what exactly is what? Is the 4 pin RGB called RGBI and is the 6 pin >RGB just called RGB? > The common use of RGB, RGBI, and RGBA as I have seen them used are: RGB: a mode with 3 bits for 8 colors. RGBI: the above plus "intensity" , a 4 bit mode for 16 colors. RGBA: an analog mode with lots of colors. RGB and RBGI are digital modes, typically tied to a specific type of monitor that is only capable of producing specific discrete colors. RGBA requires an analog monitor that can take a varying input voltage. Ever notice the price differences between an analog and digital color monitor? I have never read about connector mode 1 and 2. It looks interesting, what is your reference? My model of the EGA is as follows. You can display 16 colors out of the possible 64 colors at any time. The 64 colors use the rgbRGB scheme you have described above. However, the EGA card has 4 memory planes, corresponding to 4 bits per pixel. .ie. each pixel on the display has a value between 0 and F hex. This is mapped into the Look UP Table (LUT) that has 64 possible modes. This LUT feeds the circuits that drive the monitor and display colors on the screen. For example, : pixel value Default LUT a blue/gray scale LUT 0 0 0 1 1 8 2 2 1 3 3 18 4 4 11 5 5 3 6 6 29 7 7 F 8 38 1D 9 39 2B A 3A 39 B 3B 19 C 3C 9 D 3D 1B E 3E 6 F 3F 7 The pixel value is the value in the bit planes, the LUT are the 16 mapped values out of the 64 possible. To work through a few values, pixel=0, default LUT=0H=rgbRGB=000000=black. pixel=1, default LUT=1H=rgbRGB=000001=blue. pixel=2, default LUT=2H=rgbRGB=000020=green. etc. >Here is the color table as I know it. Could someone please fill in the >blanks, or correct same? I have looked at all of the colors but I have simply classified them into green, blue, red, orange, etc. since I am no color expert and don't have enough names for the x shades of green I found. Hope this helps.