[A83] Re: Point of making your own lcd_busy?

To: <assembly-83@lists.ticalc.org>
Subject: [A83] Re: Point of making your own lcd_busy?
From: "Henk Poley" <hpoley@dds.nl>
Date: Fri, 7 Feb 2003 23:25:46 +0100
Reply-To: assembly-83@lists.ticalc.org

> Van: Jeff <telepath75@hotmail.com>
> 
> What is the point of wasting 5 bytes of memory, in a direct LCD program,
> by writing your own lcd_busy subroutine, when it is already in ROM?  TI
> has documented it's own ROM call _lcd_busy, but if that's not good enough
> for us, we can call $07DE and it is exactly the same thing, cycle per
> cycle, byte per byte, as: push af, inc hl, dec hl, pop af, ret...

Use:

   EX (SP),HL
   EX (SP),HL

One byte small than a call and still slow more than enough, AFAIK.

	Henk Poley <><

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[A83] Re: Point of making your own lcd_busy?

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