Version analysis of cmn - Elite on the 6502

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

Cassette, Disc (flight), Disc (docked), 6502 Second Processor, Master and Electron

Code variations between these versions are shown below.

       Name: cmn
       Type: Subroutine
   Category: Status
    Summary: Print the commander's name


 Print control code 4 (the commander's name).


 Other entry points:

   cmn-1                Contains an RTS


.cmn

Code variation 1 of 2Specific to an individual platform

This variation is blank in the Cassette, Disc (flight), 6502 Second Processor, Master and Electron versions.

Docked
 JSR MT19               \ Call MT19 to capitalise the next letter (i.e. set
                        \ Sentence Case for this word only)

 LDY #0                 \ Set up a counter in Y, starting from 0

.QUL4

Code variation 2 of 2Specific to an individual platform

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

Cassette, Docked, Electron
Flight, 6502SP, Master
 LDA NA%,Y              \ The commander's name is stored at NA%, so load the
                        \ Y-th character from NA%
 LDA NAME,Y             \ The commander's name is stored at NAME, so load the
                        \ Y-th character from NAME

 CMP #13                \ If we have reached the end of the name, return from
 BEQ ypl-1              \ the subroutine (ypl-1 points to the RTS below)

 JSR TT26               \ Print the character we just loaded

 INY                    \ Increment the loop counter

 BNE QUL4               \ Loop back for the next character

 RTS                    \ Return from the subroutine