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⌂ ∞ ▽ Elite on the 6502

Encyclopedia: trading

[Elite-A, Parasite]

       Name: trading                                                 [Show more]
       Type: Subroutine
   Category: Encyclopedia
    Summary: Wait until a key is pressed and show the Encyclopedia screen

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * encyclopedia calls trading
             * controls calls via l_restart
             * equip_data calls via l_restart




 Other entry points:

   l_restart            Does exactly the same as a call to trading



.trading

.l_restart

 JSR check_keys         \ Call check_keys to wait until a key is pressed,
                        \ quitting the game if the game if COPY (pause) and
                        \ ESCAPE are pressed

 TXA                    \ Copy the number of the key pressed into A

 BEQ l_restart          \ If check_keys returned with X = 0, then we paused the
                        \ game with COPY and then unpaused it with DELETE, in
                        \ which case loop back to l_restart to keep checking for
                        \ key presses

 JMP BAY                \ Jump to BAY to go to the docking bay (i.e. show the
                        \ Encyclopedia screen)