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⌂ ∞ Elite on the BBC Micro and NES

Save and load: DOSVN

[6502 Second Processor version, I/O processor]

       Name: DOSVN                                                   [Show more]
       Type: Subroutine
   Category: Save and load
    Summary: Implement the #DOSVN <flag> command (update the "save in progress"
             flag)

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




 This routine is run when the parasite sends a #DOSVN <flag> command. It
 updates the "save in progress" flag in svn

 Arguments:

   A                    The new value of the "save in progress" flag



.DOSVN

 STA svn                \ Store the new "save in progress" flag in svn

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