A86: Re: Video RAM problem

To: <assembly-86@lists.ticalc.org>
Subject: A86: Re: Video RAM problem
From: "JBrett" <tbarwick@esn.net>
Date: Mon, 23 Nov 1998 20:07:30 -0800
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-86@lists.ticalc.org


Well, you could use the rom call to put a dot on the screen, _idot I think,
but I am not sure.  Then set it up to either turn off the pixel or xor the
pixel (same thing).  Hey Joshua Seagoe, could you help me out with the rom
call please =)
______
JBrett
tbarwick@esn.net
ICQ UIN: 20607010
http://ww2.esn.net/~tbarwick
ACZ member
Plexus Publishing member
-----Original Message-----
From: KidFedX@aol.com <KidFedX@aol.com>
To: assembly-86@lists.ticalc.org <assembly-86@lists.ticalc.org>
Date: Monday, November 23, 1998 5:04 PM
Subject: A86: Video RAM problem


>
>okay, I have a problem with the video RAM; in my program (the intro) I turn
>all the pixels on (for a night sky) and then I want to put some stars in.
I
>want these stars in specific locations so I decided to load the bits into
>locations manu.  but when I loaded say %11101111 into $FC33; $FC34 instead
of
>being %11111111 would turn to %00000000.  Why is it doing this?  I have a
>black screen with dots in the right places, but one address location over
it's
>all blank.  Oh, and if you know an easier way to do this, could you tell me
>please?  Thanks a bunch!
>
>Here's the section of code:
>
>#include "ti86asm.inc"
>
>.org _asm_exec_ram
>
>  call _runindicoff
>
>BLACK:
>  ld hl,$fc00
> ld d,h
> ld e,$01
> ld bc,$03ff
> ld (hl),c
> ldir
>
>LITTLESTARS:   ;this will put stars in black sky
>  ld hl,%11011111
>  ld ($FC3F),hl
>  ld ($FCB9),hl
>  ld ($FEB5),hl
>  ld ($FF36),hl
>  ld ($FFB9),hl
>  ld hl,%01111111
>  ld ($FD1D),hl
>  ld ($FDA5),hl
>It goes on in the same fashion.
>