Version analysis of DEATH2 - Elite on the BBC Micro and NES

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: DEATH2
       Type: Subroutine
   Category: Start and end
    Summary: Reset most of the game and restart from the title screen


 This routine is called following death, and when the game is quit by pressing
 ESCAPE when paused.


.DEATH2

Code variation 1 of 2Specific to an individual platform

This variation is blank in the Cassette, Disc (flight), Disc (docked) and Electron versions.

6502SP, Master
 LDX #&FF               \ Set the stack pointer to &01FF, which is the standard
 TXS                    \ location for the 6502 stack, so this instruction
                        \ effectively resets the stack

 JSR RES2               \ Reset a number of flight variables and workspaces
                        \ and fall through into the entry code for the game
                        \ to restart from the title screen

Code variation 2 of 2Specific to an individual platform

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

Flight
 JSR CATD               \ Call CATD to reload the disc catalogue

 BNE INBAY              \ Jump to INBAY to load the docked code (this BNE is
                        \ effectively a JMP)