re: A86: Register Usage

To: assembly-86@lists.ticalc.org
Subject: re: A86: Register Usage
From: Pat Milheron <pmilheron@ti.com>
Date: Tue, 7 Oct 1997 08:21:04 -0700
Conversation-Id: <199710070433.XAA11490@plains.NoDak.edu>
In-Reply-To: <BMSMTP87623737570a0734985@dpcs4.itg.ti.com>
Reply-To: assembly-86@lists.ticalc.org

Brad-
      The do not use the alternate register set,when interrupts are handled the
      main register set is swapped into the alternate set and the restored when
      the interrupt handler finishes.

      When power is first applied the initial pc is at 0.
      When coming from off to on the pc will be set to the
      address following the halt instruction.

Later,
Pat 

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

From: Brad Vender <vender@plains.NoDak.edu>, on 10/6/97 11:49 PM:
I just have two major questions about the TI-86 for the moment:
  Where does the calculator begin execution in the event of power on?
  Basically, I was just wondering if someone could quote for me the
  power on start up sequence for this machine (the initial PC value).

  Does the TI-OS make use of the alternate register set (cf EXX)?
  I was just wondering if its acceptable to use (sorry, its just that
  I've always thought it was a really neat thing to put in a chip).
Thanks,
--Brad
(Who can hopefully begin the logic analysis project soon.)

References:

re: A86: Register Usage

From: Pat Milheron <pmilheron@ti.com>