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⌂ ∞ Elite on the BBC Micro and NES

Version analysis of SPBT

This code appears in the following versions (click to see it in the source code):

Code variations between these versions are shown below.

       Name: SPBT
       Type: Variable
   Category: Dashboard
    Summary: The bitmap definition for the space station indicator bulb



 The bitmap definition for the space station indicator's "S" bulb that gets
 displayed on the dashboard.

Code variation 1 of 2A variation in the comments only

Tap on a block to expand it, and tap it again to revert.

Cassette, Flight, Docked
6502SP, Master
Electron
 Each pixel is in mode 5 colour 2 (%10), which is yellow/white.

 The bulb is four pixels wide, so it covers two mode 2 character blocks, one
 containing the left half of the "S", and the other the right half, which are
 displayed next to each other. Each pixel is in mode 2 colour 7 (%1111), which
 is white.

 Each pixel is a white mode 4 pixel.




.SPBT

Code variation 2 of 2Related to an advanced feature

The "S" indicator bulb on the dashboard is four pixels wide in the advanced versions, while it is only three pixels wide in the cassette and disc versions. It is seven pixels wide in the Electron version, though the latter is in monochrome mode 4, so this is equivalent to 3.5 pixels in the colour versions.

Tap on a block to expand it, and tap it again to revert.

Cassette, Flight, Docked
6502SP, Master
Electron
 EQUB %11100000         \ x x x .
 EQUB %11100000         \ x x x .
 EQUB %10000000         \ x . . .
 EQUB %11100000         \ x x x .
 EQUB %11100000         \ x x x .
 EQUB %00100000         \ . . x .
 EQUB %11100000         \ x x x .
 EQUB %11100000         \ x x x .

                        \ Left half of the "S" bulb
                        \
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x
 EQUB %10101010         \ x .
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x
 EQUB %00000000         \ . .
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x

                        \ Right half of the "S" bulb
                        \
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x
 EQUB %00000000         \ . .
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x
 EQUB %01010101         \ . x
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x

                        \ Combined "S" bulb
                        \
                        \ x x x x
                        \ x x x x
                        \ x . . .
                        \ x x x x
                        \ x x x x
                        \ . . . x
                        \ x x x x
                        \ x x x x

 EQUB %11111110         \ x x x x x x x x .
 EQUB %11111110         \ x x x x x x x x .
 EQUB %11100000         \ x x x . . . . . .
 EQUB %11111110         \ x x x x x x x x .
 EQUB %11111110         \ x x x x x x x x .
 EQUB %00001110         \ . . . . . x x x .
 EQUB %11111110         \ x x x x x x x x .
 EQUB %11111110         \ x x x x x x x x .