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⌂ ∞ ▽ Elite on the BBC Micro and NES

Missions: BRIEF3

[NES version, Bank 0]

       Name: BRIEF3                                                  [Show more]
       Type: Subroutine
   Category: Missions
    Summary: Receive the briefing and plans for mission 2
  Deep dive: The Thargoid Plans mission

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * DOENTRY calls BRIEF3




.BRIEF3

 LDA TP                 ; Set bits 1 and 3 of TP to indicate that mission 1 is
 AND #%11110000         ; complete, and mission 2 is in progress and the plans
 ORA #%00001010         ; have been picked up
 STA TP

 LDA #222               ; Set A = 222 so the call to BRP prints extended token
                        ; 222 (the briefing for mission 2 where we pick up the
                        ; plans we need to take to Birera)

 BNE BRP                ; Jump to BRP to print the extended token in A and show
                        ; the Status Mode screen), returning from the subroutine
                        ; using a tail call (this BNE is effectively a JMP as A
                        ; is never zero)