{|
|-
| ''Bit 7'' | ''Bit 6''
| ''Function''
|-
| 0 | 0
| Select pen
|-
| 0 | 1
| Select colour for selected pen
|-
| 1 | 0
| Select screen mode, rom configuration and interrupt control
|-
| 1 | 1
| Ram Memory Management (note 1)
|}
{|
|-
| ''Bit'' | ''Value''
| ''Function''
|-
| 7 | 0
| rowspan="2" | Gate Array function "Pen Selection"
|-
| 6
| 0
|-
| 5 | -
| not used
|-
| 4 | 1
| Select border
|-
| 3 | x
| rowspan="4" | Ignored
|-
| 2
| x
|-
| 1
| x
|-
| 0
| x
|}
{|
|-
| ''Bit'' | ''Value''
| ''Function''
|-
| 7 | 0
| rowspan="2" | Gate Array function "Pen Selection"
|-
| 6
| 0
|-
| 5 | -
| not used
|-
| 4 | 0 1
| Select pen
|-
| 3 | x
| rowspan="4" | Pen number
|-
| 2
| x
|-
| 1
| x
|-
| 0
| x
|}
{|
|-
| ''Bit'' | ''Value''
| ''Function''
|-
| 7 | 0
| rowspan="2" | Gate Array function "Colour selection"
|-
| 6
| 1
|-
| 5 | -
| not used
|-
| 4 | x
| rowspan="5" | Colour number x
|-
| 3
| x
|-
| 2
| x
|-
| 1
| x
|-
| 0
| x
|}
{|
|-
| ''Colour Number'' | ''Colour Name''
| ''Color''
|-
| 0 | White
| bgcolor="#808080" |
|-
| 1 | White (note 1)
| bgcolor="#808080" |
|-
| 2 | Sea Green
| bgcolor="#00ff80" |
|-
| 3 | Pastel Yellow
| bgcolor="#ffff50" |
|-
| 4 | Blue
| bgcolor="#000080" |
|-
| 5 | Purple
| bgcolor="#ff0080" |
|-
| 6 | Cyan
| bgcolor="#008080" |
|-
| 7 | Pink
| bgcolor="#ff8080" |
|-
| 8 | Purple (note 1)
| bgcolor="#ff0080" |
|-
| 9 | Pastel Yellow (note 1)
| bgcolor="#ffff50" |
|-
| 10 | Bright Yellow
| bgcolor="#ffff80" |
|-
| 11 | Bright White
| bgcolor="#ffffff" |
|-
| 12 | Bright Red
| bgcolor="#ff0000" |
|-
| 13 | Bright Magenta
| bgcolor="#ff00ff" |
|-
| 14 | Orange
| bgcolor="#ff8000" |
|-
| 15 | Pastel Magenta
| bgcolor="#ff80ff" |
|-
| 16 | Blue (note 1)
| bgcolor="#000080" |
|-
| 17 | Sea Green (note 1)
| bgcolor="#00ff80" |
|-
| 18 | Bright Green
| bgcolor="#00ff00" |
|-
| 19 | Bright Cyan
| bgcolor="#00ffff" |
|-
| 20 | Black
| bgcolor="#000000" |
|-
| 21 | Bright Blue
| bgcolor="#0000ff" |
|-
| 22 | Green
| bgcolor="#008000" |
|-
| 23 | Sky Blue
| bgcolor="#0080ff" |
|-
| 24 | Magenta
| bgcolor="#800080" |
|-
| 25 | Pastel Green
| bgcolor="#80ff80" |
|-
| 26 | Lime
| bgcolor="#80ff00" |
|-
| 27 | Pastel Cyan
| bgcolor="#80ffff" |
|-
| 28 | Red
| bgcolor="#800000" |
|-
| 29 | Mauve
| bgcolor="#8000ff" |
|-
| 30 | Yellow
| bgcolor="#808000" |
|-
| 31 | Pastel Blue
| bgcolor="#8080ff" |
|}
{|
|-
| ''Bit 1'' | ''Bit 0''
| ''Screen mode''
|-
| 0 | 0
| Mode 0, 160x200 resolution, 16 colours
|-
| 0 | 1
| Mode 1, 320x200 resolution, 4 colours
|-
| 1 | 0
| Mode 2, 640x200 resolution, 2 colours
|-
| 1 | 1
| Mode 3, 160x200 resolution, 4 colours (note 1)
|}
{|
|-
| ''Bit'' | ''Value''
| ''Function''
|-
| 7 | 0
| rowspan="2" | Gate Array function
|-
| 6
| 1
|-
| 5 | -
| not used
|-
| 4 | x
| Interrupt generation control
|-
| 3 | x
|
*1 Upper rom area disable
|-
| 2 | x
|
*1 Lower rom area disable
|-
| 1 | x
| rowspan="2" | Mode slection
|-
| 0
| x
|}
{|
|-
| ''Firmware Colour Number'' | ''Colour Name'' | ''Hardware Number'' | ''Quick reference colour value''
| ''Color''
|-
| 0 | Black | 20 | &54
| bgcolor="#000000" |
|-
| 1 | Blue | 4 | &44
| bgcolor="#000080" |
|-
| 2 | Bright Blue | 21 | &55
| bgcolor="#0000ff" |
|-
| 3 | Red | 28 | &5C
| bgcolor="#800000" |
|-
| 4 | Magenta | 24 | &58
| bgcolor="#800080" |
|-
| 5 | Mauve | 29 | &5D
| bgcolor="#8000ff" |
|-
| 6 | Bright Red | 12 | &4C
| bgcolor="#ff0000" |
|-
| 7 | Purple | 5 | &45
| bgcolor="#ff0080" |
|-
| 8 | Bright Magenta | 13 | &4D
| bgcolor="#ff00ff" |
|-
| 9 | Green | 22 | &56
| bgcolor="#008000" |
|-
| 10 | Cyan | 6 | &46
| bgcolor="#008080" |
|-
| 11 | Sky Blue | 23 | &57
| bgcolor="#0080ff" |
|-
| 12 | Yellow | 30 | &5E
| bgcolor="#808000" |
|-
| 13 | White | 0 | &40
| bgcolor="#808080" |
|-
| 14 | Pastel Blue | 31 | &5F
| bgcolor="#8080ff" |
|-
| 15 | Orange | 14 | &4E
| bgcolor="#ff8000" |
|-
| 16 | Pink | 7 | &47
| bgcolor="#ff8080" |
|-
| 17 | Pastel Magenta | 15 | &4F
| bgcolor="#ff80ff" |
|-
| 18 | Bright Green | 18 | &52
| bgcolor="#00ff00" |
|-
| 19 | Sea Green | 2
|
|-
| 20 | Bright Cyan | 19 | &53
| bgcolor="#00ffff" |
|-
| 21 | Lime | 26 | &5A
| bgcolor="#80ff00" |
|-
| 22 | Pastel Green | 25 | &59
| bgcolor="#80ff80" |
|-
| 23 | Pastel Cyan | 27 | &5B
| bgcolor="#80ffff" |
|-
| 24 | Bright Yellow | 10 | &4A
| bgcolor="#ffff80" |
|-
| 25 | Pastel Yellow | 3 | &43
| bgcolor="#ffff80" |
|-
| 26 | Bright White | 11 | &4B
| bgcolor="#ffffff" |
|}
{|
|-
| ''Hardware Colour Index'' | ''Colour Name'' | ''R %'' | ''G %'' | ''B %''
| ''Color''
|-
| 0 | White | align="right" | 50 | align="right" | 50 | align="right" | 50
| bgcolor="#808080" |
|-
| 1 | White | align="right" | 50 | align="right" | 50 | align="right" | 50
| bgcolor="#808080" |
|-
| 2 | Sea Green | align="right" | 0 | align="right" | 100 | align="right" | 50
| bgcolor="#00ff80" |
|-
| 3 | Pastel Yellow | align="right" | 100 | align="right" | 100 | align="right" | 50
| bgcolor="#ffff80" |
|-
| 4 | Blue | align="right" | 0 | align="right" | 0 | align="right" | 50
| bgcolor="#000080" |
|-
| 5 | Purple | align="right" | 100 | align="right" | 0 | align="right" | 50
| bgcolor="#ff0080" |
|-
| 6 | Cyan | align="right" | 0 | align="right" | 50 | align="right" | 50
| bgcolor="#008080" |
|-
| 7 | Pink | align="right" | 100 | align="right" | 50 | align="right" | 50
| bgcolor="#ff8080" |
|-
| 8 | Purple | align="right" | 100 | align="right" | 0 | align="right" | 50
| bgcolor="#ff0080" |
|-
| 9 | Pastel Yellow | align="right" | 100 | align="right" | 100 | align="right" | 50
| bgcolor="#ffff80" |
|-
| 10 | Bright Yellow | align="right" | 100 | align="right" | 100 | align="right" | 0
| bgcolor="#ffff00" |
|-
| 11 | Bright White | align="right" | 100 | align="right" | 100 | align="right" | 100
| bgcolor="#ffffff" |
|-
| 12 | Bright Red | align="right" | 100 | align="right" | 0 | align="right" | 0
| bgcolor="#ff0000" |
|-
| 13 | Bright Magenta | align="right" | 100 | align="right" | 0 | align="right" | 100
| bgcolor="#ff00ff" |
|-
| 14 | Orange | align="right" | 100 | align="right" | 50 | align="right" | 0
| bgcolor="#ff8000" |
|-
| 15 | Pastel Magenta | align="right" | 100 | align="right" | 50 | align="right" | 100
| bgcolor="#ff80ff" |
|-
| 16 | Blue | align="right" | 0 | align="right" | 0 | align="right" | 50
| bgcolor="#000080" |
|-
| 17 | Sea Green | align="right" | 0 | align="right" | 100 | align="right" | 50
| bgcolor="#00ff80" |
|-
| 18 | Bright Green | align="right" | 0 | align="right" | 100 | align="right" | 0
| bgcolor="#00ff00" |
|-
| 19 | Bright Cyan | align="right" | 0 | align="right" | 100 | align="right" | 100
| bgcolor="#00ffff" |
|-
| 20 | Black | align="right" | 0 | align="right" | 0 | align="right" | 0
| bgcolor="#000000" |
|-
| 21 | Bright Blue | align="right" | 0 | align="right" | 0 | align="right" | 100
| bgcolor="#0000ff" |
|-
| 22 | Green | align="right" | 0 | align="right" | 50 | align="right" | 0
| bgcolor="#008000" |
|-
| 23 | Sky Blue | align="right" | 0 | align="right" | 50 | align="right" | 100
| bgcolor="#0080ff" |
|-
| 24 | Magenta | align="right" | 50 | align="right" | 0 | align="right" | 50
| bgcolor="#800080" |
|-
| 25 | Pastel Green | align="right" | 50 | align="right" | 100 | align="right" | 50
| bgcolor="#80ff80" |
|-
| 26 | Lime | align="right" | 50 | align="right" | 100 | align="right" | 0
| bgcolor="#80ff00" |
|-
| 27 | Pastel Cyan | align="right" | 50 | align="right" | 100 | align="right" | 100
| bgcolor="#80ffff" |
|-
| 28 | Red | align="right" | 50 | align="right" | 0 | align="right" | 0
| bgcolor="#800000" |
|-
| 29 | Mauve | align="right" | 50 | align="right" | 0 | align="right" | 100
| bgcolor="#8000ff" |
|-
| 30 | Yellow | align="right" | 50 | align="right" | 50 | align="right" | 0
| bgcolor="#808000" |
|-
| 31 | Pastel Blue | align="right" | 50 | align="right" | 50 | align="right" | 100
| bgcolor="#8080ff" |
|}
{|
|-
| ''Firmware Colour Number'' | ''Colour Name'' | ''R %'' | ''G %'' | ''B %''
| ''Color''
|-
| 0 | Black | 0 | 0 | 0
| bgcolor="#000000" |
|-
| 1 | Blue | 0 | 0 | 50
| bgcolor="#000080" |
|-
| 2 | Bright Blue | 0 | 0 | 100
| bgcolor="#0000ff" |
|-
| 3 | Red | 50 | 0 | 0
| bgcolor="#800000" |
|-
| 4 | Magenta | 50 | 0 | 50
| bgcolor="#800080" |
|-
| 5 | Mauve | 50 | 0 | 100
| bgcolor="#8000ff" |
|-
| 6 | Bright Red | 100 | 0 | 0
| bgcolor="#ff0000" |
|-
| 7 | Purple | 100 | 0 | 50
| bgcolor="#ff0080" |
|-
| 8 | Bright Magenta | 100 | 0 | 100
| bgcolor="#ff00ff" |
|-
| 9 | Green | 0 | 50 | 0
| bgcolor="#008000" |
|-
| 10 | Cyan | 0 | 50 | 50
| bgcolor="#008080" |
|-
| 11 | Sky Blue | 0 | 50 | 100
| bgcolor="#0080ff" |
|-
| 12 | Yellow | 50 | 50 | 0
| bgcolor="#808000" |
|-
| 13 | White | 50 | 50 | 50
| bgcolor="#808080" |
|-
| 14 | Pastel Blue | 50 | 50 | 100
| bgcolor="#8080ff" |
|-
| 15 | Orange | 100 | 50 | 0
| bgcolor="#ff8000" |
|-
| 16 | Pink | 100 | 50 | 50
| bgcolor="#ff8080" |
|-
| 17 | Pastel Magenta | 100 | 50 | 100
| bgcolor="#ff80ff" |
|-
| 18 | Bright Green | 0 | 100 | 0
| bgcolor="#00ff00" |
|-
| 19 | Sea Green | 0 | 100 | 50
| bgcolor="#00ff80" |
|-
| 20 | Bright Cyan | 0 | 100 | 100
| bgcolor="#00ffff" |
|-
| 21 | Lime | 50 | 100 | 0
| bgcolor="#80ff00" |
|-
| 22 | Pastel Green | 50 | 100 | 50
| bgcolor="#80ff80" |
|-
| 23 | Pastel Cyan | 50 | 100 | 100
| bgcolor="#80ffff" |
|-
| 24 | Bright Yellow | 100 | 100 | 0
| bgcolor="#ffff00" |
|-
| 25 | Pastel Yellow | 100 | 100 | 50
| bgcolor="#ffff80" |
|-
| 26 | Bright White | 100 | 100 | 100
| bgcolor="#ffffff" |
|}