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⌂ ∞ ▽ Elite on the 6502

Version analysis of TR1

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

Code variations between these versions are shown below.

       Name: TR1
       Type: Subroutine
   Category: Save and load
    Summary: Copy the last saved commander's name from NA% to INWK



.TR1

 LDX #7                 \ The commander's name can contain a maximum of 7
                        \ characters, and is terminated by a carriage return,
                        \ so set up a counter in X to copy 8 characters

.GTL2

Code variation 1 of 1Specific to an individual platform

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

Cassette, Electron
Docked, 6502SP, Master
 LDA NA%,X              \ Copy the X-th byte of NA% to the X-th byte of INWK
 STA INWK,X

 LDA NA%,X              \ Copy the X-th byte of NA% to the X-th byte of INWK+5
 STA INWK+5,X

 DEX                    \ Decrement the loop counter

 BPL GTL2               \ Loop back until we have copied all 8 bytes

 RTS                    \ Return from the subroutine