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⌂ ∞ Elite on the BBC Micro and NES

Market: stay_here

[Elite-A, Parasite]

       Name: stay_here                                               [Show more]
       Type: Subroutine
   Category: Market
    Summary: Pay a docking fee and refresh the system's market prices

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * TT102 calls stay_here




.stay_here

 LDX #&F4               \ It costs 50.0 Cr to refresh the station's market
 LDY #&01               \ prices, which is represented as a value of 500, so
                        \ this sets (Y X) = &1F4 = 500

 JSR LCASH              \ Subtract (Y X) cash from the cash pot, but only if
                        \ we have enough cash

 BCC stay_quit          \ If the C flag is clear then we did not have enough
                        \ cash for the transaction, so jump to stay_quit to
                        \ return from the subroutine without refreshing the
                        \ market prices

 JSR cour_dock          \ Update the current special cargo delivery mission

 JSR DORND              \ Set A and X to random numbers

 STA QQ26               \ Set QQ26 to the random byte that's used in the market
                        \ calculations

 JSR GVL                \ Calculate the availability for each market item in the
                        \ new system

.stay_quit

 JMP BAY                \ Go to the docking bay (i.e. show the Status Mode
                        \ screen)