Re: A85: FIND_PIXEL

To: assembly-85@lists.ticalc.org
Subject: Re: A85: FIND_PIXEL
From: justin.bosch%tfexchng@min.net (JUSTIN BOSCH)
Date: Fri, 22 Aug 97 00:02:00 -0500
Organization: The File Exchange / Catonsville, MD 410-744-1102
References: <33FCD4E3.2C6E@geocities.com>
Reply-To: assembly-85@lists.ticalc.org

-> Nope. I should explain how the TI's Rom works. The ROM is 128k, but
-> 16 bit addressing would only allow 64k to be accessed! So the 64k is
-> divided into 32k RAM, 16k ROM, and 16K paged ROM. The ROM is divided
-> into 8 pages: page 0 holds the important functions (all ROM_CALLS
-> except FIND_PIXEL). So the first 16k of ROM is page 0, and it is
-> always present! by changing to page 4 you change the 2nd 16K of ROM.
-> Of course, since FIND_PIXEL is the only ROM_CALL NOT on page 0, you
-> do not need to change it back, until you exit the shell. But the
-> shell does it automatically! So you really don't have to do anything.
-> TI-ROM experts, correct me if I am wrong.

If I want to use any of the other functions I STILL don't have to change
it back?  Sorry to bother everyone but this is confusing.

Follow-Ups:

Re: A85: FIND_PIXEL

From: Wolfgang Amadeus Mozart <mozart@technologist.com>

A85: 85s to 86p conversion possibility

From: Kevin Buck <mckbuck@coastalnet.com>

References:

Re: A85: FIND_PIXEL

From: Terry Peng <tpeng@geocities.com>

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