Text: prilf

       Name: prilf                                                   [Show more]
       Type: Subroutine
   Category: Text
    Summary: Implement the #prilf command (print a blank line on the printer)
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * JMPTAB calls prilf


 This routine is run when the parasite sends a #prilf command. It prints a
 blank line on the printer by printing two line feeds.


.prilf

 LDA #2                 \ Print ASCII 2 using the non-vectored OSWRCH, which
 JSR NVOSWRCH           \ means "start sending characters to the printer"

 LDA #10                \ Send ASCII 10 to the printer twice using the POSWRCH
 JSR POSWRCH            \ routine, which prints a blank line below the current
 JSR POSWRCH            \ line as ASCII 10 is the line feed character

 LDA #3                 \ Print ASCII 3 using the non-vectored OSWRCH, which
 JSR NVOSWRCH           \ means "stop sending characters to the printer"

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