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⌂ ∞ Elite on the BBC Micro and NES

Drawing ships: GetDefaultNEWB

[NES version, Bank 7]

       Name: GetDefaultNEWB                                          [Show more]
       Type: Subroutine
   Category: Drawing ships
    Summary: Fetch the default NEWB flags for a specified ship type

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * NWSHP calls GetDefaultNEWB
             * TACTICS (Part 4 of 7) calls GetDefaultNEWB




 Arguments:

   Y                    The ship type



 Returns:

   A                    The default NEWB flags for ship type Y



.GetDefaultNEWB

 LDA currentBank        ; Fetch the number of the ROM bank that is currently
 PHA                    ; paged into memory at $8000 and store it on the stack

 LDA #1                 ; Page ROM bank 1 into memory at $8000
 JSR SetBank

 LDA E%-1,Y             ; Set A to the default NEWB flags for ship type Y

 JMP ResetBankA         ; Jump to ResetBankA to retrieve the bank number we
                        ; stored above and page it back into memory, returning
                        ; from the subroutine using a tail call