RE: A85: IY flags

To: <assembly-85@lists.ticalc.org>
Subject: RE: A85: IY flags
From: "Ahmed El-Helw" <ahmedre@bellsouth.net>
Date: Fri, 21 Aug 1998 06:12:44 -0400
Delivered-To: assembly-85-outgoing@towerguard.unix.edu.sollentuna.se
Importance: Normal
In-Reply-To: <35DCF33F.A537C31A@cyberdude.com>
Reply-To: assembly-85@lists.ticalc.org


I know what you are porting, and I ported the same thing to the 83 with Sam
Heald.  Anyways, set 3,(iy+$05) on the 86 reverses text [inverts], but on
the 86 it XORs the text to the screen.  In other words, if the pixel is
white, it is made black, if the pixel is black, it is made white.  The
solution to this would simply be re-writing the vputmap routine.  Hope that
helped.  As for the INT stuff, check out the Vertigo source for that..
							=Ahmed

--
Ahmed El-Helw
ahmedre@bellsouth.net
http://asm8x.home.ml.org
ICQ: 3350394

-----Original Message-----
From: owner-assembly-85@lists.ticalc.org
[mailto:owner-assembly-85@lists.ticalc.org]On Behalf Of Dark Ryder
Sent: Friday, August 21, 1998 12:11 AM
To: Assembly-85 Mailing List
Subject: A85: IY flags



Well, I'm trying to port an 85 program to the 86 (it's a surprise, for
now!),
but I've hit a little snag - it contains the following snippet of code:

 set 3,(iy+5)
 ld hl,TimerInt
 call INT_INSTALL

Now, I figured out the interrupt (I think), but I can't figure out what bit
3 of
iy+5 is supposed to do.  On the 86, it sets D_ZT_STR and D_ZM_STR to
inverse,
but this program doesn't use inverse.  Anybody know what it _does_ do?
Maybe
something with the interrupt?

--
Dark Ryder
ICQ#:     8189903
E-Mail:   DarkRyder@cyberdude.com

Happiness is inversely proportional to how much you want to upgrade your
computer.

References:

A85: IY flags

From: Dark Ryder <DarkRyder@cyberdude.com>