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⌂ ∞ Elite on the BBC Micro and NES

Version analysis of mes9

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

Code variations between these versions are shown below.

       Name: mes9
       Type: Subroutine
   Category: Flight
    Summary: Print a text token, possibly followed by " DESTROYED"



 Print a text token, followed by " DESTROYED" if the destruction flag is set
 (for when a piece of equipment is destroyed).



.mes9

 JSR TT27               \ Call TT27 to print the text token in A

Code variation 1 of 1Minor and very low-impact

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

Cassette, 6502SP, Master, Electron
Docked
Flight
 LSR de                 \ If bit 0 of variable de is clear, return from the
 BCC out                \ subroutine (as out contains an RTS)

 LSR de                 \ If bits 1-7 of variable de are clear, return from the
 BEQ out                \ subroutine (as out contains an RTS). This means that
                        \ " DESTROYED" is never shown, even if bit 0 of de is
                        \ set, which makes sense as we are docked

 LSR de                 \ If bit 0 of variable de is clear, return from the
 BCC DK5                \ subroutine (as DK5 contains an RTS)

 LDA #253               \ Print recursive token 93 (" DESTROYED") and return
 JMP TT27               \ from the subroutine using a tail call