Re: A86: Simple TI-85 Question

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Simple TI-85 Question
From: CashOnly@aol.com
Date: Sun, 9 Aug 1998 23:26:33 EDT
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-86@lists.ticalc.org


> VIDEO_MEM
>  
>  (PROGRAM_ADDR)
>  
>  (ZS_BITS)

The VIDEO_MEM is the equivalent to $FC00 on the TI-85. That is basically the
lcd screen memory. 1024 bytes long.

PROGRAM_ADDR is the address of the program. ZShell, or some other shell, sets
this before running a program. This is used in all JUMPs, some LDs, and CALLs.
This was mainly used before relocation. The actual address in PROGRAM_ADDR is
acually the byte after the description. Usually after the 0 in the string
file.

ZS_BITS is a bit that you can set to tell ZShell to recalculate the checksum.
This isn't supported by most other shells on the 85, and is not real
important.

I hope that helps. I program for the 85, so if you have any further questions
I will try to answer them :)

-------
NAME : Mikel Blanchard, President of Macross Software
WEB   : http://MacrossSoftware.home.ml.org/
EMAIL : cashonly@aol.com
ICQ     : 3033904 (CashOnly)