The TT170 subroutine - Elite on the 6502

       Name: TT170                                                   [Show more]
       Type: Subroutine
   Category: Start and end
    Summary: Main entry point for the Elite game code
  Deep dive: Program flow of the main game loop
    Context: See this subroutine in context in the source code
 Variations: See code variations for this subroutine in the different versions
 References: No direct references to this subroutine in this source file


 This is the main entry point for the main game code. It is called after the
 various setup, decryption and checksum routines in S%, G% and BEGIN have
 successfully completed.


.TT170

 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 RESET              \ Call RESET to initialise most of the game variables

IF _EXECUTIVE

 JSR DEMON              \ Call DEMON to show the demo

 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 RESET              \ Call RESET to initialise most of the game variables

ENDIF

                        \ Fall through into DEATH2 to start the game
Start and end: TT170

[6502 Second Processor version]
