A83: rom redundancy

To: assembly-83@lists.ticalc.org
Subject: A83: rom redundancy
From: "Doug Torrance" <profzoom@hotmail.com>
Date: Sat, 29 Apr 2000 01:10:02 PDT
Reply-To: assembly-83@lists.ticalc.org


I was messing around, comparing the disassembled roms of the 82 and 83, and 
I noticed something interesting.  Most of the 83's commonly used rom calls 
in the $4000's actually just call another routine earlier on in the rom.  
For instance, take a look at _getcsc, located at $4014:
call $268
ret
I tested out a little program using $268 instead of $4014, and of course it 
worked perfectly.  Plus I saved a few clock cycles.  Any idea why TI might 
have done this?

Doug
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Follow-Ups:

Re: A83: rom redundancy

From: Scott Dial <wrath@calc.org>

A83: Sv: rom redundancy

From: "Andreas" <ahj@trition.dk>