Difference between revisions of "Physical colour numbers"

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[[Category:VDU commands]]
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+---+---+---+---+---+---+---+---+
+
Physical colour numbers are used as the short physical colour in the VDU 19
−
|F/B| B |  |  |  | B | G | R |
+
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 a VDU driver to interface with other platforms this mapping
−
  |  |  |  |  |  |  |  +---Red
+
must be adhered to.
−
  |  |  |  |  |  |  +-------Green
 
−
  |  |  |  |  |  +-----------Blue
 
−
  |  |  +---+---+---------------Extension
 
−
  |  +---------------------------Border
 
−
  +-------------------------------0=Foreground, 1=Background
 
  
 +
===Colour bitmap===
 +
<div class="mw-widebody">
 +
    7  6  5  4  3  2  1  0
 +
  +---+---+---+---+---+---+---+---+
 +
  | L | D | 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
 +
    +-------------- 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
 +
</div>
 +
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.
  
−
  0 0 x x x b g r - foreground colour
+
==Implementation details==
−
  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
 
  
−
BBC implements:
+
===Electron/BBC/Master/etc===
−
   l x x x f b g r - foreground colour
+
<div class="mw-widebody">
−
           +-------- flash
+
  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
 +
</div>
 +
===ZX Spectrum===
 +
<div class="mw-widebody">
 +
  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
 +
</div>
 +
===Commodore===
 +
<div class="mw-widebody">
 +
  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  Border  Colour
 +
  0 &00  128 &80  192 &C0  Black            8 &08  136 &88  200 &C8  Dark Grey   
 +
  1 &01  129 &81  193 &C1  Red/Brown        9 &09  137 &89  201 &C9  Bright Red   
 +
  2 &02  130 &82  194 &C2  Green            10 &0A  138 &8A  202 &CA  Bright Green 
 +
  3 &03  131 &83  195 &C3  Yellow/Orange    11 &0B  139 &8B  203 &CB  Bright Yellow
 +
  4 &04  132 &84  196 &C4  Blue            12 &0C  140 &8C  204 &CC  Bright Blue 
 +
  5 &05  133 &85  197 &C5  Magenta/Purple  13 &0D  141 &8D  205 &CD  Bright Magenta
 +
  6 &06  134 &86  198 &C6  Cyan            14 &0E  142 &8E  206 &CE  Light Grey   
 +
  7 &07  135 &87  199 &C7  Light Grey      15 &0F  143 &8F  207 &CF  White       
 +
</div>
 +
===DOS/Windows===
 +
<div class="mw-widebody">
 +
  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
 +
</div>
 +
===ANSI Terminal===
 +
<div class="mw-widebody">
 +
  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
 +
</div>
  
−
Spectrum implements:
+
==See also==
−
  l b x f i b g r - foreground colour
+
* [http://mdfs.net/Info/Comp/BBC/Display/Colours/Physical.htm Physical colour numbers]
−
    |  | +-------- bright
+
* [http://mdfs.net/Software/BBCBasic/Porting/VDUSpecs BBC BASIC Host VDU Interface Specification]
−
    |  +---------- flash
 
−
    +-------------- border
 
  
−
    Bit 0 - Red
+
[[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 23:06, 16 June 2016 (UTC)
−
    Bit 1 - Green
 
−
    Bit 2 - Blue
 
−
    Bit 3 - Bright
 
−
    Bit 4 - Flash
 
−
    Bit 5 - Change colour only, don't change Flash and Bright
 
−
    Bit 6 - Change Flash and Bright only, don't change colours
 
−
    Bit 7 - 0=Set foreground or flash/bright, 1=Set background or border
 
−
 
 
−
  This results in the colour being set as follows:
 
−
 
 
−
    &00+n (0-63)    - text foreground colour
 
−
    &40+n (64-127)  - flash and bright without changing colours
 
−
    &80+n (128-191) - text background colour
 
−
    &C0+n (192-255) - border colour
 
−
 
 
−
      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
 
−
 
 
−
Spectrum Colour Numbers with BBC BASIC support
 
−
----------------------------------------------
 
−
 
 
−
b0: Red
 
−
b1: Green
 
−
b2: Blue
 
−
b3: Intense
 
−
b4: Flash
 
−
b5: 0=change F/I        1=don't change F/I
 
−
b6: 0=change RGB        1=don't change RGB
 
−
b7: 0=foreground or F/I  1=background or border
 
−
 
 
−
 
 
−
  0  &00  %000FIBGR - foreground colour
 
−
32  &20  %001xxBGR - foreground colour, don't change current F and I
 
−
64  &40  %010FIxxx - set F and I without changing current colours
 
−
96  &60  %011xxxxx - don't change anything!
 
−
128  &80  %100FIBGR - background colour
 
−
160  &A0  %101xxBGR - background colour, don't change current F and I
 
−
192  &C0  %110xxBGR - border colour (no F or I anyway)
 
−
224  &E0  %111xxBGR - border colour, don't change current F and I
 
−
 
 
−
 
 
−
%000IFBGR - foreground colour
 
−
-----------------------------
 
−
  0 black ink
 
−
  1 red ink
 
−
  2 green ink
 
−
  3 yellow ink
 
−
  4 blue ink
 
−
  5 magenta ink
 
−
  6 cyan ink
 
−
  7 white ink
 
−
 
 
−
  8 black ink, bright
 
−
  9 red ink, bright
 
−
10 green ink, bright
 
−
11 yellow ink, bright
 
−
12 blue ink, bright
 
−
13 magenta ink, bright
 
−
14 cyan ink, bright
 
−
15 white ink, bright
 
−
 
 
−
16 black ink, flash
 
−
17 red ink, flash
 
−
18 green ink, flash
 
−
19 yellow ink, flash
 
−
20 blue ink, flash
 
−
21 magenta ink, flash
 
−
22 cyan ink, flash
 
−
23 white ink, flash
 
−
 
 
−
24 black ink, bright, flash
 
−
25 red ink, bright, flash
 
−
26 green ink, bright, flash
 
−
27 yellow ink, bright, flash
 
−
28 blue ink, bright, flash
 
−
29 magenta ink, bright, flash
 
−
30 cyan ink, bright, flash
 
−
31 white ink, bright, flash
 
−
 
 
−
%001xxBGR - foreground colour, don't change current F and I
 
−
-----------------------------------------------------------
 
−
32 black ink, bright unchanged, flash unchanged
 
−
33 red ink, bright unchanged, flash unchanged
 
−
34 green ink, bright unchanged, flash unchanged
 
−
35 yellow ink, bright unchanged, flash unchanged
 
−
36 blue ink, bright unchanged, flash unchanged
 
−
37 magenta ink, bright unchanged, flash unchanged
 
−
38 cyan ink, bright unchanged, flash unchanged
 
−
39 white ink, bright unchanged, flash unchanged
 
−
 
 
−
%010FIxxx - set I and F without changing current colours
 
−
--------------------------------------------------------
 
−
64 flash off, bright off
 
−
72 flash off, bright on
 
−
80 flash on, bright off
 
−
88 flash on, bright on
 
−
 
 
−
%011xxxxx - reserved - don't change current F/I or RGB
 
−
-----------------------------------------------------
 
−
 
 
−
%100IFBGR - background colour
 
−
-----------------------------
 
−
128 black paper
 
−
129 red paper
 
−
130 green paper
 
−
131 yellow paper
 
−
132 blue paper
 
−
133 magenta paper
 
−
134 cyan paper
 
−
135 white paper
 
−
 
 
−
136 black paper, bright
 
−
137 red paper, bright
 
−
138 green paper, bright
 
−
139 yellow paper, bright
 
−
140 blue paper, bright
 
−
141 magenta paper, bright
 
−
142 cyan paper, bright
 
−
143 white paper, bright
 
−
 
 
−
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
 

Latest revision as of 22:11, 17 July 2021

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 a VDU driver to interface with other platforms this mapping must be adhered to.

Colour bitmap

   7   6   5   4   3   2   1   0
 +---+---+---+---+---+---+---+---+
 | L | D | 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
    +-------------- 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   Border   Colour
  0 &00  128 &80  192 &C0  Black             8 &08  136 &88  200 &C8  Dark Grey     
  1 &01  129 &81  193 &C1  Red/Brown         9 &09  137 &89  201 &C9  Bright Red    
  2 &02  130 &82  194 &C2  Green            10 &0A  138 &8A  202 &CA  Bright Green  
  3 &03  131 &83  195 &C3  Yellow/Orange    11 &0B  139 &8B  203 &CB  Bright Yellow 
  4 &04  132 &84  196 &C4  Blue             12 &0C  140 &8C  204 &CC  Bright Blue   
  5 &05  133 &85  197 &C5  Magenta/Purple   13 &0D  141 &8D  205 &CD  Bright Magenta
  6 &06  134 &86  198 &C6  Cyan             14 &0E  142 &8E  206 &CE  Light Grey    
  7 &07  135 &87  199 &C7  Light Grey       15 &0F  143 &8F  207 &CF  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

See also

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

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