Version analysis of MT9 - Elite on the BBC Micro and NES

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

Disc (docked), 6502 Second Processor and Master

Code variations between these versions are shown below.

       Name: MT9
       Type: Subroutine
   Category: Text
    Summary: Clear the screen and set the current view type to 1
  Deep dive: Extended text tokens


 This routine sets the following:

   * XC = 1 (tab to column 1)

 before calling TT66 to clear the screen and set the view type to 1.


.MT9

Code variation 1 of 1Related to Elite's use of the Tube

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

Docked, Master
6502SP
 LDA #1                 \ Move the text cursor to column 1
 STA XC
 LDA #1                 \ Call DOXC to move the text cursor to column 1
 JSR DOXC

 JMP TT66               \ Jump to TT66 to clear the screen and set the current
                        \ view type to 1, returning from the subroutine using a
                        \ tail call