Drawing lines: NLIN4

       Name: NLIN4                                                   [Show more]
       Type: Subroutine
   Category: Drawing lines
    Summary: Draw a horizontal line at pixel row 19 to box in a title
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * controls calls NLIN4
             * equip_data calls NLIN4
             * JMTB calls NLIN4
             * menu calls NLIN4
             * ships_ag calls NLIN4


 This routine is used on the Inventory screen to draw a horizontal line at
 pixel row 19 to box in the title.


.NLIN4

 LDA #19                \ Jump to NLIN2 to draw a horizontal line at pixel row
 BNE NLIN2              \ 19, returning from the subroutine with using a tail
                        \ call (this BNE is effectively a JMP as A will never
                        \ be zero)