Physical colour numbers
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.
Contents
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
+-------------- 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
