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⌂ ∞ Elite on the BBC Micro and NES

Dashboard: HideShip_b1

[NES version, Bank 7]

       Name: HideShip_b1                                             [Show more]
       Type: Subroutine
   Category: Dashboard
    Summary: Update the current ship so it is no longer shown on the scanner
  Deep dive: Splitting NES Elite across multiple ROM banks

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * Main flight loop (Part 11 of 16) calls HideShip_b1




.HideShip_b1

 LDA #0                 ; Zero byte #33 in the current ship's data block at K%,
 LDY #33                ; so it is not shown on the scanner (a non-zero byte #33
 STA (INF),Y            ; represents the ship's number on the scanner, with a
                        ; ship number of zero indicating that the ship is not
                        ; shown on the scanner)

                        ; Fall through into HideFromScanner to hide the scanner
                        ; sprites for this ship and reset byte #33 in the INWK
                        ; workspace