Flight: DOFE21

       Name: DOFE21                                                  [Show more]
       Type: Subroutine
   Category: Flight
    Summary: Implement the #DOFE21 <flag> command (show the energy bomb effect)
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * JMPTAB calls DOFE21


 This routine is run when the parasite sends a #DOFE21 <flag> command. It takes
 the argument and stores it in SHEILA &21 to change the palette.

 See p.379 of the Advanced User Guide for an explanation of palette bytes.


 Arguments:

   A                    The new value of SHEILA &21


.DOFE21

 STA &FE21              \ Store the new value in SHEILA &21

 JMP PUTBACK            \ Jump to PUTBACK to restore the USOSWRCH handler and
                        \ return from the subroutine using a tail call