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Elite on the BBC Micro

Drawing lines: NLIN4 [Disc version, Flight]

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: * TT213 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)