Drawing the screen: clss

       Name: clss                                                    [Show more]
       Type: Subroutine
   Category: Drawing the screen
    Summary: Clear the screen, move the text cursor to the top-left corner and
             jump back into the CHPR routine to print the next character
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * CHPR calls clss


.clss

 JSR TT66simp           ; Call TT66simp to clear the whole screen inside the box
                        ; border, and move the text cursor to the top-left
                        ; corner

 LDA K3                 ; We called this routine from CHPR, which put the
                        ; character we are printing into K3, so set A to the
                        ; character number so we can jump back to CHPR to print
                        ; it on the newly cleared screen

 JMP RRafter            ; Jump back into the CHPR routine to print the character
                        ; in A