Re: A82: Greyscale Mentioned?

To: assembly-82@lists.ticalc.org
Subject: Re: A82: Greyscale Mentioned?
From: ADAMMAN106@aol.com
Date: Wed, 28 Jul 1999 16:35:58 EDT
Delivered-To: assembly-82-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-82@lists.ticalc.org
Reply-To: assembly-82@lists.ticalc.org


In a message dated 7/28/99 1:29:51 PM Eastern Daylight Time, Jkhum98@aol.com 
writes:

> n a message dated 7/28/99 11:54:09 AM Central Daylight Time, 
>  ADAMMAN106@aol.com writes:
>  
>  > In a message dated 7/28/99 1:34:19 AM Eastern Daylight Time,  
>  > Jkhum98@aol.com writes:
>  >  
>  >  > Ive read that ADAMMAN is using Greyscale for Defiance, and Jeremy is 
>  using 
>  >  >  it for AgentX... Would y'all mind posting any source code you have 
on 
>  that?  
>  >  
>  >  Jeremy posted his source on his website.  Though I haven't really 
looked 
>  at 
>  >  the source, I tried out his test programs and it seems to be better 
>  quality 
>  >  grayscale than mine.  Sometime I will probably analyze it and see what 
> the 
>  >  differences are, but I'm pretty sure we both use interrupt speed to 
vary 
>  the 
>  >  quality of the grayscale.
>  >
>  >  > I would assume the greyscale interrupt technique is very similar to 
> what 
>  >  > the 83 can do, and I have been experimenting alot with greyscale for 
> the
>  >  > past week, and a month ago before this, yet I cant get it to be of 
any 
>  good 
>  >  > quality... I got perfect greyscale on VTI, but that means nothing 
since 
> 
>  it 
>  >  > doesnt Emulate the hardware in any similar way... Please inform me 
> about
>  >  > any new techniques there are... :)
>  >  >  
>  >  >  Jason_K
>  >  
>  >  I basically ported the interrupt stuff from the 85, and used a routine 
>  given 
>  >  to me by Dines to put the images on the LCD.  It's not the fastest 
>  routine, 
>  >  but it seemed to give better results than faster routines.  Then so the 
>  >  grayscale doesn't look like crap, you need to use port 4 to change the 
>  >  interrupt speeds...unfortunately the quality that different speeds give 
>  > seems 
>  >  to vary greatly on each calc, and of course battery power is a major 
>  factor. 
>  >  
>  >  Grayscale on the 82 is extremely sensitive to any changes that are made.
>  >  I haven't even attempted to implement it into Defiance yet, and I hope 
> and 
>  >  pray that it will work well.
>  >  
>  >  ~Adamman
>  >  
>  
>  May I have the URL to Jeremy's Website...?  

I'm not sure of it, I have it bookmarked on my other computer

>  
>  With the interrupt speed, do you alter that within the interrupt, or 
before 

before

>  you enable it? And do you change the interrupt speed to vary the shades of 
>  grey, or do you just use a ratio of altering the bit planes in the 
>  interrupt...?

the second one

>  
>  You say you have a routine to put Images to the LCD? I thought the method 
> was 
>  to use two 768 byte Bit-Planes, and copy those to the LCD... I understand 
> how 
>  that would be slower than Direct LCD Communication, but I dont know how to 
>  keep track of the images and stuff... =P

That's what I meant

>  
>  Jason_K

~Adamman