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⌂ ∞ ▽ Elite on the 6502

Version analysis of hy6 / dockEd

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

Code variations between these versions are shown below.

Code variation 1 of 5A variation in the comments only

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Cassette, Electron
6502SP, Master
       Name: hy6

       Name: dockEd

       Type: Subroutine
   Category: Flight
    Summary: Print a message to say there is no hyperspacing allowed inside the
             station



 Print "Docked" at the bottom of the screen to indicate we can't hyperspace
 when docked.

Code variation 2 of 5A variation in the labels only

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Cassette, Electron
6502SP, Master
.hy6

.dockEd

 JSR CLYNS              \ Clear the bottom three text rows of the upper screen,
                        \ and move the text cursor to the first cleared row

Code variation 3 of 5Related to Elite's use of the Tube

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Cassette, Master, Electron
6502SP
 LDA #15                \ Move the text cursor to column 15 (the middle of the
 STA XC                 \ screen), setting A to 15 at the same time for the
                        \ following call to TT27

 LDA #15                \ Move the text cursor to column 15
 JSR DOXC

Code variation 4 of 5Related to the screen mode

This variation is blank in the Cassette and Electron versions.

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Master
6502SP
 LDA #RED               \ Switch to colour 2, which is magenta in the trade view
 STA COL                \ or red in the chart view

 LDA #RED               \ Send a #SETCOL RED command to the I/O processor to
 JSR DOCOL              \ switch to colour 2, which is magenta in the trade view
                        \ or red in the chart view

Code variation 5 of 5Minor and very low-impact

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Cassette, Electron
6502SP, Master
 JMP TT27               \ Print recursive token 129 ("{sentence case}DOCKED")
                        \ and return from the subroutine using a tail call

 LDA #205               \ Print extended token 205 ("DOCKED") and return from
 JMP DETOK              \ the subroutine using a tail call