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⌂ ∞ Elite on the BBC Micro and NES

Utility routines: cls

[6502 Second Processor version, I/O processor]

       Name: cls                                                     [Show more]
       Type: Subroutine
   Category: Utility routines
    Summary: Clear the top part of the screen and draw a white border

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * TT26 calls cls




.cls

 JSR TTX66              \ Call TTX66 to clear the top part of the screen and
                        \ draw a white border

 JMP RR4                \ Jump to RR4 to restore X and Y from the stack and A
                        \ from K3, and return from the subroutine using a tail
                        \ call