re: A83: problems with the 83+ ?

To: assembly-83@lists.ticalc.org
Subject: re: A83: problems with the 83+ ?
From: Pat Milheron <pmilheron@ti.com>
Date: Thu, 14 Jan 1999 08:47:57 -0800
Conversation-Id: <dc95fa50.369d11eb@aol.com>
Delivered-To: assembly-83-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <dc95fa50.369d11eb@aol.com>
Reply-To: assembly-83@lists.ticalc.org


All 83 asm programs will need to be modified to some extent to
run on the 83 plus. All of the ROM calls in the 83's jump table
are available on the 83+, there are also a bunch of new ones. 

Things that have changed:

	- the jump table (entry points) has been modified to use 
	  less ROM space. This means that all calls and jumps to
	  system rouitnes will need to be changed to not using the
	  Z80 'call' and 'JP' instructions, but to instead use a macro
	  that TI will provide that sets up an 'RST' instruction  for 
	  each call or jump to a system routine.

        - Some RAM structures have been modified and this may cause some
	  problems but I don't think anything major. For sure the ram equates
          have changed for most things.

	- The 'SEND(9 ...' deal is now gone. The TI-86 commands for asm
execution
	  has been ported to the 83+. 

	- There is an 8k limit on the size of an asm program that is executing. 

Later,
Pat

------------------
Original text

From: VorTexx15@aol.com, on 1/13/99 4:36 PM:

I read on Ticalc that there is a new 83+ coming out.  I went to the TI web
page and saw some of the changes made to the 83.  I think asm programs for the
83 won't be compatible.  I read that all the keys will be in the same place
but two.  Won't this change the values asm programs check for when doing
input?  I think for sure it will change the direct input.  I don't know what
keys these are and if any games use them.  Another thing is that they have new
functions like a built in CBL and ways of dealing with this new memory (160k
archive).  This is based on the old ti-os but new features for these things
were added.  This probably moved around these rom calls we all use.  Maybe
only a couple bytes were added here and there in the rom but it will change
everything.  I know there is a 92 plus but adding a module seems a little
different than this.  I hope this won't happen but I guess we'll have to wait
and see.

References:

A83: problems with the 83+ ?

From: VorTexx15@aol.com