Difference between revisions of "Physical colour numbers"

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m (C64: Used a better monitor to confirm colours.)
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[[Category:VDU commands]]
 
[[Category:VDU commands]]
−
+
Physical colour numbers are used as the short physical colour in the VDU 19
−
  7  6  5  4  3  2  1  0
+
command, and used in the COLOUR and GCOL commands on platforms without a
−
+---+---+---+---+---+---+---+---+
+
palette. The colour number is a bitmap of the colour to select. When
−
|F/B| B | E | F | I | B | G | R |
+
implementing an operating system interface on other platforms this mapping
−
+---+---+---+---+---+---+---+---+
+
must be adhered to.
−
  |  |  |  |  |  |  |  |
+
 
−
  |  |  |  |  |  |  |  +---Red
+
===Colour bitmap===
−
  |  |  |  |  |  |  +-------Green
+
    7  6  5  4  3  2  1  0
−
  |  |  |  |  |  +-----------Blue
+
  +---+---+---+---+---+---+---+---+
−
  |  |  +---+---+---------------Extension
+
  | L | B | E | F | I | B | G | R |
−
  |  +---------------------------Border
+
  +---+---+---+---+---+---+---+---+
−
  +-------------------------------0=Foreground, 1=Background
+
    |  |  |  |  |  |  |  |
−
+
    |  |  |  |  |  |  |  +---Red
−
+
    |  |  |  |  |  |  +-------Green
−
   0 0 x x x b g r - &00+n - foreground colour
+
    |  |  |  |  |  +-----------Blue
−
   0 1 x x x b g r - &40+n - extension
+
    |  |  |  |  +---------------Intense
−
   1 0 x x x b g r - &80+n - background colour
+
    |  |  |  +-------------------Flash
−
   1 1 x x x b g r - &C0+n - border colour
+
    |  |  +-----------------------Extension
−
+
    |  +---------------------------Border
−
BBC implements:
+
    +-------------------------------0=Foreground, 1=Background
−
   l x x x f b g r - foreground colour
+
 
 +
  This gives:
 +
   0 0 e f i b g r - &00+n - foreground colour
 +
   0 1 e f i b g r - &40+n - extension
 +
   1 0 e f i b g r - &80+n - background colour
 +
   1 1 e f i b g r - &C0+n - border colour
 +
 
 +
  The BBC implements:
 +
   l x x x f b g r - colour
 
           +-------- flash
 
           +-------- flash
−
+
 
−
Spectrum implements:
+
  The ZX Spectrum implements:
−
   l b x f i b g r - foreground colour
+
   l b e f i b g r - colour
−
     |   | +-------- bright
+
     | | | +-------- bright
−
     |   +---------- flash
+
     | | +---------- flash
 +
    | +------------ change only flash/bright
 
     +-------------- border
 
     +-------------- border
−
+
 
−
Commodore implements
+
  The Commodore implements:
−
   l b x f i b g r - foreground colour
+
   l b x f i b g r - colour
 
     |  | +-------- bright
 
     |  | +-------- bright
 
     |  +---------- flash
 
     |  +---------- flash
 
     +-------------- border
 
     +-------------- border
−
+
 
−
DOS/Windows implements
+
  DOS/Windows implements:
−
  l x x x i b g r - foreground colour
+
   l x x f i b g r - colour
−
          +-------- bright
 
−
 
−
ANSI Terminal implements
 
−
   l x x f i b g r - foreground colour
 
 
         | +-------- bright
 
         | +-------- bright
 
         +---------- flash
 
         +---------- flash
−
+
 
−
+
  ANSI terminal implements:
−
+
   l b e f i b g r - colour
−
Details
+
     | | | +-------- bright
−
-------
+
     | | +---------- flash
−
+
     | +------------ underline
−
Spectrum implements:
+
    +-------------- inverse
−
   l b x f i b g r - foreground colour
+
 
−
     |   | +-------- bright
+
The BBC uses b3=flash, whereas all platforms other than the BBC uses
−
     |   +---------- flash
+
b4=flash. For visual compatibility, programs could use 0-7 for non-flashing
−
     +-------------- border
+
colours and 24-31 for flashing colours. On the BBC these will be flashing
−
+
colours, on other platforms these will be bright flashing colours where
−
  %00xxxbgr - &00+num - foreground colour
+
supported.
−
  %01xxxbgr - &40+num - reserved
+
 
−
  %10xxxbgr - &80+num - background colour
+
==Implementation details==
−
  %11xxxbgr - &C0+num - border colour
+
 
−
+
===Electron/BBC/Master/etc===
−
      Bit 0 - Red
+
  0+n &00+n - foreground colour
−
      Bit 1 - Green
+
128+n  &80+n - background colour
−
      Bit 2 - Blue
+
 
−
      Bit 3 - Bright
+
  Fore    Back                      Fore    Back
−
      Bit 4 - Flash
+
  ground ground  Colour          ground  ground   Colour
−
      Bit 5 - Change colour only, don't change Flash and Bright
+
  0 &00 128 &80 Black            8 &08  136 &88  Flashing Black
−
      Bit 6 - Change Flash and Bright only, don't change colours
+
  1 &01 129 &81 Red              9 &09  137 &89  Flashing Red
−
      Bit 7 - 0=Set foreground or flash/bright, 1=Set background or border
+
  2 &02 130 &82 Green            10 &0A  138 &8A  Flashing Green
−
   
+
  3 &03 131 &83 Yellow          11 &0B  139 &8B  Flashing Yellow
−
    This results in the colour being set as follows:
+
  4 &04 132 &84 Blue            12 &0C  140 &8C  Flashing Blue
−
+
  5 &05 133 &85 Magenta          13 &0D  141 &8D  Flashing Magenta
−
      &00+n (0-63)    - text foreground colour
+
  6 &06 134 &86 Cyan            14 &0E  142 &8E  Flashing Cyan
−
      &40+n (64-127)  - flash and bright without changing colours
+
  7 &07 135 &87 White            15 &0F  143 &8F  Flashing White
−
      &80+n (128-191) - text background colour
+
 
−
      &C0+n (192-255) - border colour
+
===ZX Spectrum===
−
   
+
  0+n &00+n  %000FIBGR - foreground colour, bright and flash
−
        Fore    Back
+
  32+n  &20+n  %001xxBGR - foreground colour, without changing flash and bright
−
      ground  ground   Border    Colour
+
  64+n  &40+n  %010xIxxx - bright without changing current colour
−
      0 &00   128 &80   192 &C0  Black
+
  96+n  &60+n  %011Fxxxx - flash without changing current colour
−
      1 &01   129 &81   193 &C1  Red
+
128+n  &80+n  %100FIBGR - background colour, bright and flash
−
      2 &02   130 &82   194 &C2  Green
+
160+n  &A0+n  %101xxBGR - background colour, without changing flash and bright
−
      3 &03   131 &83   195 &C3  Yellow
+
  192+n &C0+n %11xxxBGR - border colour
−
      4 &04   132 &84   196 &C4  Blue
+
 
−
      5 &05   133 &85   197 &C5  Magenta
+
  Fore    Back                              Fore    Back
−
      6 &06   134 &86   198 &C6  Cyan
+
  ground ground  Border  Colour          ground ground  Colour
−
      7 &07   135 &87   199 &C7  White
+
  0 &00  128 &80 192 &C0  Black            16 &10 144 &90 Flashing Black
−
+
   1 &01 129 &81 193 &C1 Red              17 &11 145 &91 Flashing Red
−
Spectrum Colour Numbers with BBC BASIC support
+
  2 &02 130 &82 194 &C2 Green            18 &12 146 &92 Flashing Green
−
  ----------------------------------------------
+
  3 &03 131 &83 195 &C3 Yellow          19 &13 147 &93 Flashing Yellow
−
   
+
  4 &04 132 &84 196 &C4 Blue            20 &14  148 &94 Flashing Blue
−
  b0: Red
+
  5 &05 133 &85 197 &C5 Magenta          21 &15  149 &95  Flashing Magenta
−
  b1: Green
+
  6 &06  134 &86  198 &C6  Cyan            22 &16  150 &96  Flashing Cyan
−
b2: Blue
+
   7 &07  135 &87  199 &C7  White            23 &17  151 &97  Flashing White
−
b3: Intense
+
   8 &08  136 &88          Bright Black    24 &18  152 &98 Flashing Bright Black
−
  b4: Flash
+
   9 &09  137 &89          Bright Red      25 &19  153 &99  Flashing Bright Red
−
  b5: 0=change F/I        1=don't change F/I
+
   10 &0A  138 &8A          Bright Green    26 &1A  154 &9A  Flashing Bright Green
−
b6: 0=change RGB        1=don't change RGB
+
   11 &0B  139 &8B          Bright Yellow    27 &1B  155 &9B  Flashing Bright Yellow
−
  b7: 0=foreground or F/I 1=background or border
+
   12 &0C  140 &8C          Bright Blue      28 &1C  156 &9C  Flashing Bright Blue
−
   
+
   13 &0D 141 &8D          Bright Magenta   29 &1D  157 &9D  Flashing Bright Magenta
−
   
+
   14 &0E  142 &8E          Bright Cyan      30 &1E  158 &9E  Flashing Bright Cyan
−
   0 &00  %000FIBGR - foreground colour
+
   15 &0F  143 &8F          Bright White    31 &1F  159 &9F  Flashing Bright White
−
  32 &20 %001xxBGR - foreground colour, don't change current F and I
+
    
−
  64 &40 %010FIxxx - set F and I without changing current colours
+
   32 &20 160 &A0          Black, without changing flash/bright
−
  96 &60 %011xxxxx - don't change anything!
+
   33 &21 161 &A1          Red, without changing flash/bright
−
  128 &80 %100FIBGR - background colour
+
   34 &22 162 &A2          Green, without changing flash/bright
−
  160 &A0 %101xxBGR - background colour, don't change current F and I
+
   35 &23 163 &A3          Yellow, without changing flash/bright
−
192 &C0 %110xxBGR - border colour (no F or I anyway)
+
   36 &24 164 &A4          Blue, without changing flash/bright
−
  224 &E0 %111xxBGR - border colour, don't change current F and I
+
   37 &25 165 &A5          Magenta, without changing flash/bright
−
   
+
   38 &26 166 &A6          Cyan, without changing flash/bright
−
   
+
   39 &27 167 &A7          White, without changing flash/bright
−
  %000IFBGR - foreground colour
+
    
−
  -----------------------------
+
   64 &40                    Bright off      96 &60          Flash off
−
   0 black ink
+
   72 &48                    Bright on      112 &70          Flash on
−
  1 red ink
+
 
−
   2 green ink
+
===Commodore===
−
  3 yellow ink
+
  0+n &00+n - foreground colour
−
  4 blue ink
+
  128+n  &80+n - background colour
−
  5 magenta ink
+
192+n  &C0+n - border colour
−
  6 cyan ink
+
 
−
  7 white ink
+
  Fore    Back                              Fore    Back
−
   
+
  ground  ground  Border  Colour          ground  ground  Colour
−
  8 black ink, bright
+
  0 &00  128 &80  192 &C0  Black            16 &10  144 &90  Flashing Black
−
   9 red ink, bright
+
  1 &01  129 &81  193 &C1  Red/Brown        17 &11  145 &91  Flashing Red/Brown
−
  10 green ink, bright
+
  2 &02  130 &82  194 &C2  Green            18 &12  146 &92  Flashing Green
−
   11 yellow ink, bright
+
  3 &03  131 &83  195 &C3  Yellow/Orange    19 &13  147 &93  Flashing Yellow/Orange
−
  12 blue ink, bright
+
  4 &04  132 &84  196 &C4  Blue            20 &14  148 &94  Flashing Blue
−
   13 magenta ink, bright
+
  5 &05  133 &85  197 &C5  Magenta/Purple   21 &15  149 &95  Flashing Magenta/Purple
−
   14 cyan ink, bright
+
  6 &06  134 &86  198 &C6 Cyan            22 &16 150 &96  Flashing Cyan
−
   15 white ink, bright
+
  7 &07  135 &87 199 &C7  Light Grey      23 &17  151 &97  Flashing Light Grey
−
   
+
  8 &08  136 &88  200 &C8  Dark Grey        24 &18  152 &98  Flashing Dark Grey
−
   16 black ink, flash
+
  9 &09  137 &89  201 &C9  Bright Red      25 &19  153 &99  Flashing Bright Red
−
   17 red ink, flash
+
   10 &0A  138 &8A  202 &CA  Bright Green    26 &1A 154 &9A Flashing Bright Green
−
   18 green ink, flash
+
  11 &0B  139 &8B  203 &CB  Bright Yellow    27 &1B  155 &9B  Flashing Bright Yellow
−
   19 yellow ink, flash
+
  12 &0C  140 &8C  204 &CC Bright Blue      28 &1C 156 &9C  Flashing Bright Blue
−
   20 blue ink, flash
+
  13 &0D 141 &8D  205 &CD  Bright Magenta  29 &1D 157 &9D Flashing Bright Magenta
−
   21 magenta ink, flash
+
  14 &0E 142 &8E 206 &CE Light Grey      30 &1E 158 &9E Flashing Light Grey
−
   22 cyan ink, flash
+
  15 &0F 143 &8F 207 &CF White            31 &1F 159 &9F Flashing White
−
   23 white ink, flash
+
 
−
+
===DOS/Windows===
−
   24 black ink, bright, flash
+
  0+n &00+n - foreground colour
−
   25 red ink, bright, flash
+
  128+n &80+n - background colour
−
   26 green ink, bright, flash
+
 
−
   27 yellow ink, bright, flash
+
  Fore    Back                      Fore    Back
−
  28 blue ink, bright, flash
+
  ground ground  Colour          ground ground  Colour
−
   29 magenta ink, bright, flash
+
  0 &00 128 &80 Black            16 &10 144 &90 Flashing Black
−
   30 cyan ink, bright, flash
+
  1 &01 129 &81  Red              17 &11 145 &91 Flashing Red
−
   31 white ink, bright, flash
+
  2 &02 130 &82 Green            18 &12 146 &92 Flashing Green
−
+
  3 &03 131 &83 Yellow          19 &13  147 &93 Flashing Yellow
−
  %001xxBGR - foreground colour, don't change current F and I
+
  4 &04 132 &84 Blue            20 &14  148 &94  Flashing Blue
−
  -----------------------------------------------------------
+
  5 &05 133 &85  Magenta          21 &15  149 &95  Flashing Magenta
−
  32 black ink, bright unchanged, flash unchanged
+
  6 &06  134 &86  Cyan            22 &16  150 &96  Flashing Cyan
−
  33 red ink, bright unchanged, flash unchanged
+
  7 &07  135 &87  White            23 &17  151 &97 Flashing White
−
  34 green ink, bright unchanged, flash unchanged
+
  8 &08 136 &88 Bright Black    24 &18 152 &98 Flashing Bright Black
−
  35 yellow ink, bright unchanged, flash unchanged
+
  9 &09 137 &89 Bright Red      25 &19 153 &99  Flashing Bright Red
−
   36 blue ink, bright unchanged, flash unchanged
+
  10 &0A 138 &8A Bright Green    26 &1A 154 &9A  Flashing Bright Green
−
  37 magenta ink, bright unchanged, flash unchanged
+
  11 &0B  139 &8B  Bright Yellow    27 &1B  155 &9B  Flashing Bright Yellow
−
  38 cyan ink, bright unchanged, flash unchanged
+
  12 &0C  140 &8C  Bright Blue      28 &1C  156 &9C  Flashing Bright Blue
−
  39 white ink, bright unchanged, flash unchanged
+
  13 &0D 141 &8D Bright Magenta  29 &1D 157 &9D Flashing Bright Magenta
−
   
+
  14 &0E 142 &8E Bright Cyan      30 &1E 158 &9E Flashing Bright Cyan
−
  %010FIxxx - set I and F without changing current colours
+
  15 &0F 143 &8F  Bright White    31 &1F 159 &9F Flashing Bright White
−
  --------------------------------------------------------
+
 
−
  64 flash off, bright off
+
===ANSI Terminal===
−
  72 flash off, bright on
+
  0+n  &00+n - foreground colour
−
   80 flash on, bright off
+
128+n  &80+n - background colour
−
  88 flash on, bright on
+
 
−
   
+
  Fore    Back                      Fore    Back
−
  %011xxxxx - reserved - don't change current F/I or RGB
+
  ground  ground  Colour          ground  ground  Colour
−
-----------------------------------------------------
+
  0 &00  128 &80  Black            16 &10 144 &90 Flashing Black
−
   
+
  1 &01 129 &81  Red              17 &11  145 &91 Flashing Red
−
  %100IFBGR - background colour
+
   2 &02  130 &82  Green            18 &12  146 &92  Flashing Green
−
  -----------------------------
+
  3 &03  131 &83  Yellow          19 &13  147 &93  Flashing Yellow
−
  128 black paper
+
  4 &04  132 &84  Blue            20 &14  148 &94 Flashing Blue
−
  129 red paper
+
   5 &05  133 &85  Magenta          21 &15  149 &95  Flashing Magenta
−
  130 green paper
+
   6 &06  134 &86  Cyan            22 &16  150 &96  Flashing Cyan
−
  131 yellow paper
+
   7 &07 135 &87 White            23 &17 151 &97 Flashing White
−
  132 blue paper
+
   8 &08  136 &88  Bright Black    24 &18  152 &98  Flashing Bright Black
−
  133 magenta paper
+
  9 &09  137 &89  Bright Red      25 &19  153 &99  Flashing Bright Red
−
  134 cyan paper
+
   10 &0A  138 &8A  Bright Green    26 &1A  154 &9A  Flashing Bright Green
−
  135 white paper
+
   11 &0B  139 &8B  Bright Yellow   27 &1B  155 &9B  Flashing Bright Yellow
−
   
+
   12 &0C  140 &8C  Bright Blue     28 &1C  156 &9C  Flashing Bright Blue
−
  136 black paper, bright
+
   13 &0D  141 &8D  Bright Magenta   29 &1D  157 &9D  Flashing Bright Magenta
−
  137 red paper, bright
+
   14 &0E  142 &8E  Bright Cyan     30 &1E  158 &9E  Flashing Bright Cyan
−
  138 green paper, bright
+
   15 &0F  143 &8F  Bright White    31 &1F  159 &9F  Flashing Bright White
−
139 yellow paper, bright
+
    
−
140 blue paper, bright
+
   32+n  &20+n      Underlined text
−
  141 magenta paper, bright
+
   64+n  &40+n      Inverse text
−
  142 cyan paper, bright
+
 
−
  143 white paper, bright
+
[[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 23:06, 16 June 2016 (UTC)
−
 
−
144 black paper, flash
 
−
  145 red paper, flash
 
−
  146 green paper, flash
 
−
  147 yellow paper, flash
 
−
  148 blue paper, flash
 
−
  149 magenta paper, flash
 
−
  150 cyan paper, flash
 
−
  151 white paper, flash
 
−
   
 
−
  152 black paper, bright, flash
 
−
  153 red paper, bright, flash
 
−
  154 green paper, bright, flash
 
−
  155 yellow paper, bright, flash
 
−
  156 blue paper, bright, flash
 
−
  157 magenta paper, bright, flash
 
−
  158 cyan paper, bright, flash
 
−
  159 white paper, bright, flash
 
−
   
 
−
  %101xxBGR - foreground colour, don't change current F and I
 
−
  -----------------------------------------------------------
 
−
  160 black paper, bright unchanged, flash unchanged
 
−
  161 red paper, bright unchanged, flash unchanged
 
−
  162 green paper, bright unchanged, flash unchanged
 
−
  163 yellow paper, bright unchanged, flash unchanged
 
−
  164 blue paper, bright unchanged, flash unchanged
 
−
  165 magenta paper, bright unchanged, flash unchanged
 
−
  166 cyan paper, bright unchanged, flash unchanged
 
−
  167 white paper, bright unchanged, flash unchanged
 
−
   
 
−
  %110FIxxx - border colour (but border doesn't have flash or bright)
 
−
  -------------------------------------------------------------------
 
−
  192 black border
 
−
  193 red border
 
−
  194 green border
 
−
  195 yellow border
 
−
  196 blue border
 
−
  197 magenta border
 
−
  198 cyan border
 
−
  199 white border
 
−
   
 
−
  %111xxBGR - reserved - border colour, don't change current F and I
 
−
  ------------------------------------------------------------------
 
−
   
 
−
   
 
−
   
 
−
  Commodore implements
 
−
   l b x f i b g r - foreground colour
 
−
    |  | +-------- bright
 
−
    |  +---------- flash
 
−
    +-------------- border
 
−
   
 
−
   %00xxxbgr - &00+num - foreground colour
 
−
  %01xxxbgr - &40+num - reserved
 
−
   %10xxxbgr - &80+num - background colour
 
−
   %11xxxbgr - &C0+num - border colour
 
−
   
 
−
  The Commodore 64 has 16 physical colours, so this gives the following
 
−
  colours:
 
−
   
 
−
      Fore    Back
 
−
      ground  ground   Border    Colour
 
−
      0 &00  128 &80  192 &C0  Black
 
−
      1 &01  129 &81  193 &C1  Red
 
−
      2 &02   130 &82  194 &C2  Green
 
−
      3 &03   131 &83  195 &C3  Yellow
 
−
      4 &04   132 &84  196 &C4  Blue
 
−
      5 &05  133 &85   197 &C5   Magenta
 
−
      6 &06   134 &86  198 &C6  Cyan
 
−
      7 &07  135 &87   199 &C7  White
 
−
      8 &08  135 &88  200 &C8   Orange
 
−
      9 &09   136 &89  201 &C9  Light Red
 
−
      10 &0A   137 &8A  202 &CA  Light Green
 
−
      11 &0B  138 &8B  203 &CB  Light Grey
 
−
      12 &0C  139 &8C  204 &CC  Light Blue
 
−
      13 &0D  140 &8D  205 &CD  Grey
 
−
      14 &0E  141 &8E  206 &CE  Dark Grey
 
−
      15 &0F  142 &8F  207 &CF  Brown
 
−
 
−
 
−
DOS:
 
−
COLOUR 0
 
−
COLOUR 128 
 
−
Black
 
−
COLOUR 1
 
−
COLOUR 129
 
−
Red
 
−
COLOUR 2
 
−
COLOUR 130
 
−
Green
 
−
COLOUR 3
 
−
COLOUR 131
 
−
Yellow
 
−
COLOUR 4
 
−
COLOUR 132
 
−
Blue
 
−
COLOUR 5
 
−
COLOUR 133
 
−
Magenta
 
−
COLOUR 6
 
−
COLOUR 134
 
−
Cyan
 
−
COLOUR 7
 
−
COLOUR 135
 
−
White
 
−
COLOUR 8
 
−
COLOUR 136
 
−
Intensified Black
 
−
COLOUR 9
 
−
COLOUR 137
 
−
Intensified Red
 
−
COLOUR 10
 
−
COLOUR 138
 
−
Intensified Green
 
−
COLOUR 11
 
−
COLOUR 139
 
−
Intensified Yellow
 
−
COLOUR 12
 
−
COLOUR 140
 
−
Intensified Blue
 
−
COLOUR 13
 
−
COLOUR 141
 
−
Intensified Magenta
 
−
COLOUR 14
 
−
COLOUR 142
 
−
Intensified Cyan
 
−
COLOUR 15 
 
−
COLOUR 143
 
−
Intensified White
 
−
 
−
The border is specified by using -1 as the logical colour number.
 
−
 
−
The following example sets the border colour to green.
 
−
 
−
    VDU 19,-1,2,0,0,0
 
−
 
−
 
−
The alternative mode provides an 'analogue' palette by allowing you to set
 
−
the Red, Green and Blue intensities to any value between 0 and 63. The
 
−
format of the VGA 'analogue' colour palette command is shown below.
 
−
 
−
    VDU 19,logical,-1,red,green,blue
 
−
 
−
 
−
If bit 7 of the logical colour number is set (values 128 to 143), then the
 
−
enhanced palette is used and the physical colour is taken to be the IBM
 
−
colour value.
 
−
 
−
For example, the following command will set logical colour 1 to green.
 
−
 
−
    VDU 19,129,2,0,0,0
 
−
 
−
The text enhanced palette is the same as the graphics enhanced palette.
 
−
 
−
6-bit RGB colours
 
−
In the 6-bit RGB mode you set the physical colour by specifying the values
 
−
of the individual red, green and blue components as numbers in the range 0
 
−
(minimum) to 63 (maximum). Hence the value 0,0,0 corresponds to black and
 
−
the value 63,63,63 corresponds to peak (intensified) white.
 
−
 
−
To select a logical colour to one of these physical colours you must use the
 
−
VDU 19 command:
 
−
 
−
    VDU 19,logical,-1,red,green,blue
 
−
 
−
This mode is provided for compatibility with BBC BASIC (86).
 
−
 
−
8-bit RGB colours
 
−
In the 8-bit RGB mode you set the physical colour by specifying the values
 
−
of the individual red, green and blue components as numbers in the range 0
 
−
(minimum) to 255 (maximum). Hence the value 0,0,0 corresponds to black and
 
−
the value 255,255,255 corresponds to peak (intensified) white.
 
−
 
−
To select a logical colour to one of these physical colours you use either
 
−
the VDU 19 command or the COLOUR statement:
 
−
 
−
    VDU 19,logical,16,Red,Green,Blue
 
−
    COLOUR logical,Red,Green,Blue
 
−
 
−
 
−
  0 1 x x x b g r -
 
−
  1 0 x x x b g r - background colour
 
−
  1 1 x x x b g r - border colour
 

Revision as of 20:05, 8 June 2020

Physical colour numbers are used as the short physical colour in the VDU 19 command, and used in the COLOUR and GCOL commands on platforms without a palette. The colour number is a bitmap of the colour to select. When implementing an operating system interface on other platforms this mapping must be adhered to.

Colour bitmap

   7   6   5   4   3   2   1   0
 +---+---+---+---+---+---+---+---+
 | L | B | E | F | I | B | G | R |
 +---+---+---+---+---+---+---+---+
   |   |   |   |   |   |   |   |
   |   |   |   |   |   |   |   +---Red
   |   |   |   |   |   |   +-------Green
   |   |   |   |   |   +-----------Blue
   |   |   |   |   +---------------Intense
   |   |   |   +-------------------Flash
   |   |   +-----------------------Extension
   |   +---------------------------Border
   +-------------------------------0=Foreground, 1=Background
 
 This gives:
  0 0 e f i b g r - &00+n - foreground colour
  0 1 e f i b g r - &40+n - extension
  1 0 e f i b g r - &80+n - background colour
  1 1 e f i b g r - &C0+n - border colour
 
 The BBC implements:
  l x x x f b g r - colour
          +-------- flash
 
 The ZX Spectrum implements:
  l b e f i b g r - colour
    | | | +-------- bright
    | | +---------- flash
    | +------------ change only flash/bright
    +-------------- border
 
 The Commodore implements:
  l b x f i b g r - colour
    |   | +-------- bright
    |   +---------- flash
    +-------------- border
 
 DOS/Windows implements:
  l x x f i b g r - colour
        | +-------- bright
        +---------- flash
 
 ANSI terminal implements:
  l b e f i b g r - colour
    | | | +-------- bright
    | | +---------- flash
    | +------------ underline
    +-------------- inverse

The BBC uses b3=flash, whereas all platforms other than the BBC uses b4=flash. For visual compatibility, programs could use 0-7 for non-flashing colours and 24-31 for flashing colours. On the BBC these will be flashing colours, on other platforms these will be bright flashing colours where supported.

Implementation details

Electron/BBC/Master/etc

  0+n  &00+n - foreground colour
128+n  &80+n - background colour
 
  Fore    Back                      Fore    Back
 ground  ground   Colour           ground  ground   Colour
  0 &00  128 &80  Black             8 &08  136 &88  Flashing Black
  1 &01  129 &81  Red               9 &09  137 &89  Flashing Red
  2 &02  130 &82  Green            10 &0A  138 &8A  Flashing Green
  3 &03  131 &83  Yellow           11 &0B  139 &8B  Flashing Yellow
  4 &04  132 &84  Blue             12 &0C  140 &8C  Flashing Blue
  5 &05  133 &85  Magenta          13 &0D  141 &8D  Flashing Magenta
  6 &06  134 &86  Cyan             14 &0E  142 &8E  Flashing Cyan
  7 &07  135 &87  White            15 &0F  143 &8F  Flashing White

ZX Spectrum

  0+n  &00+n  %000FIBGR - foreground colour, bright and flash
 32+n  &20+n  %001xxBGR - foreground colour, without changing flash and bright
 64+n  &40+n  %010xIxxx - bright without changing current colour
 96+n  &60+n  %011Fxxxx - flash without changing current colour
128+n  &80+n  %100FIBGR - background colour, bright and flash
160+n  &A0+n  %101xxBGR - background colour, without changing flash and bright
192+n  &C0+n  %11xxxBGR - border colour
 
  Fore    Back                               Fore    Back
 ground  ground   Border   Colour           ground  ground   Colour
  0 &00  128 &80  192 &C0  Black            16 &10  144 &90  Flashing Black
  1 &01  129 &81  193 &C1  Red              17 &11  145 &91  Flashing Red
  2 &02  130 &82  194 &C2  Green            18 &12  146 &92  Flashing Green
  3 &03  131 &83  195 &C3  Yellow           19 &13  147 &93  Flashing Yellow
  4 &04  132 &84  196 &C4  Blue             20 &14  148 &94  Flashing Blue
  5 &05  133 &85  197 &C5  Magenta          21 &15  149 &95  Flashing Magenta
  6 &06  134 &86  198 &C6  Cyan             22 &16  150 &96  Flashing Cyan
  7 &07  135 &87  199 &C7  White            23 &17  151 &97  Flashing White
  8 &08  136 &88           Bright Black     24 &18  152 &98  Flashing Bright Black
  9 &09  137 &89           Bright Red       25 &19  153 &99  Flashing Bright Red
 10 &0A  138 &8A           Bright Green     26 &1A  154 &9A  Flashing Bright Green
 11 &0B  139 &8B           Bright Yellow    27 &1B  155 &9B  Flashing Bright Yellow
 12 &0C  140 &8C           Bright Blue      28 &1C  156 &9C  Flashing Bright Blue
 13 &0D  141 &8D           Bright Magenta   29 &1D  157 &9D  Flashing Bright Magenta
 14 &0E  142 &8E           Bright Cyan      30 &1E  158 &9E  Flashing Bright Cyan
 15 &0F  143 &8F           Bright White     31 &1F  159 &9F  Flashing Bright White
 
 32 &20  160 &A0           Black, without changing flash/bright
 33 &21  161 &A1           Red, without changing flash/bright
 34 &22  162 &A2           Green, without changing flash/bright
 35 &23  163 &A3           Yellow, without changing flash/bright
 36 &24  164 &A4           Blue, without changing flash/bright
 37 &25  165 &A5           Magenta, without changing flash/bright
 38 &26  166 &A6           Cyan, without changing flash/bright
 39 &27  167 &A7           White, without changing flash/bright
 
 64 &40                    Bright off       96 &60           Flash off
 72 &48                    Bright on       112 &70           Flash on

Commodore

  0+n  &00+n - foreground colour
128+n  &80+n - background colour
192+n  &C0+n - border colour
 
  Fore    Back                               Fore    Back
 ground  ground   Border   Colour           ground  ground   Colour
  0 &00  128 &80  192 &C0  Black            16 &10  144 &90  Flashing Black
  1 &01  129 &81  193 &C1  Red/Brown        17 &11  145 &91  Flashing Red/Brown
  2 &02  130 &82  194 &C2  Green            18 &12  146 &92  Flashing Green
  3 &03  131 &83  195 &C3  Yellow/Orange    19 &13  147 &93  Flashing Yellow/Orange
  4 &04  132 &84  196 &C4  Blue             20 &14  148 &94  Flashing Blue
  5 &05  133 &85  197 &C5  Magenta/Purple   21 &15  149 &95  Flashing Magenta/Purple
  6 &06  134 &86  198 &C6  Cyan             22 &16  150 &96  Flashing Cyan
  7 &07  135 &87  199 &C7  Light Grey       23 &17  151 &97  Flashing Light Grey
  8 &08  136 &88  200 &C8  Dark Grey        24 &18  152 &98  Flashing Dark Grey
  9 &09  137 &89  201 &C9  Bright Red       25 &19  153 &99  Flashing Bright Red
 10 &0A  138 &8A  202 &CA  Bright Green     26 &1A  154 &9A  Flashing Bright Green
 11 &0B  139 &8B  203 &CB  Bright Yellow    27 &1B  155 &9B  Flashing Bright Yellow
 12 &0C  140 &8C  204 &CC  Bright Blue      28 &1C  156 &9C  Flashing Bright Blue
 13 &0D  141 &8D  205 &CD  Bright Magenta   29 &1D  157 &9D  Flashing Bright Magenta
 14 &0E  142 &8E  206 &CE  Light Grey       30 &1E  158 &9E  Flashing Light Grey
 15 &0F  143 &8F  207 &CF  White            31 &1F  159 &9F  Flashing White

DOS/Windows

  0+n  &00+n - foreground colour
128+n  &80+n - background colour
 
  Fore    Back                      Fore    Back
 ground  ground   Colour           ground  ground   Colour
  0 &00  128 &80  Black            16 &10  144 &90  Flashing Black
  1 &01  129 &81  Red              17 &11  145 &91  Flashing Red
  2 &02  130 &82  Green            18 &12  146 &92  Flashing Green
  3 &03  131 &83  Yellow           19 &13  147 &93  Flashing Yellow
  4 &04  132 &84  Blue             20 &14  148 &94  Flashing Blue
  5 &05  133 &85  Magenta          21 &15  149 &95  Flashing Magenta
  6 &06  134 &86  Cyan             22 &16  150 &96  Flashing Cyan
  7 &07  135 &87  White            23 &17  151 &97  Flashing White
  8 &08  136 &88  Bright Black     24 &18  152 &98  Flashing Bright Black
  9 &09  137 &89  Bright Red       25 &19  153 &99  Flashing Bright Red
 10 &0A  138 &8A  Bright Green     26 &1A  154 &9A  Flashing Bright Green
 11 &0B  139 &8B  Bright Yellow    27 &1B  155 &9B  Flashing Bright Yellow
 12 &0C  140 &8C  Bright Blue      28 &1C  156 &9C  Flashing Bright Blue
 13 &0D  141 &8D  Bright Magenta   29 &1D  157 &9D  Flashing Bright Magenta
 14 &0E  142 &8E  Bright Cyan      30 &1E  158 &9E  Flashing Bright Cyan
 15 &0F  143 &8F  Bright White     31 &1F  159 &9F  Flashing Bright White

ANSI Terminal

  0+n  &00+n - foreground colour
128+n  &80+n - background colour
 
  Fore    Back                      Fore    Back
 ground  ground   Colour           ground  ground   Colour
  0 &00  128 &80  Black            16 &10  144 &90  Flashing Black
  1 &01  129 &81  Red              17 &11  145 &91  Flashing Red
  2 &02  130 &82  Green            18 &12  146 &92  Flashing Green
  3 &03  131 &83  Yellow           19 &13  147 &93  Flashing Yellow
  4 &04  132 &84  Blue             20 &14  148 &94  Flashing Blue
  5 &05  133 &85  Magenta          21 &15  149 &95  Flashing Magenta
  6 &06  134 &86  Cyan             22 &16  150 &96  Flashing Cyan
  7 &07  135 &87  White            23 &17  151 &97  Flashing White
  8 &08  136 &88  Bright Black     24 &18  152 &98  Flashing Bright Black
  9 &09  137 &89  Bright Red       25 &19  153 &99  Flashing Bright Red
 10 &0A  138 &8A  Bright Green     26 &1A  154 &9A  Flashing Bright Green
 11 &0B  139 &8B  Bright Yellow    27 &1B  155 &9B  Flashing Bright Yellow
 12 &0C  140 &8C  Bright Blue      28 &1C  156 &9C  Flashing Bright Blue
 13 &0D  141 &8D  Bright Magenta   29 &1D  157 &9D  Flashing Bright Magenta
 14 &0E  142 &8E  Bright Cyan      30 &1E  158 &9E  Flashing Bright Cyan
 15 &0F  143 &8F  Bright White     31 &1F  159 &9F  Flashing Bright White
 
 32+n  &20+n      Underlined text
 64+n  &40+n      Inverse text

Jgharston (talk) 23:06, 16 June 2016 (UTC)

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