Re: [stella] DD_0003

Subject: Re: [stella] DD_0003
From: "Joel Park" <joelp@xxxxxxxxxxxxxxxxxx>
Date: Mon, 24 Sep 2001 14:03:05 -0400

About the colors,  from what I've read, the Atari 2600 has 16 distinct
colors, then a series of brightness levels it was like a total of 128 or

The word HELLO is actually being drawn.   Check out this in the code:

PFData0  ;H       4 5 6 7
       .byte $00,$f0,$00,$A0,$A0,$E0,$A0,$A0
PFData1  ;EL      7 6 5 4 3 2 1 0
       .byte $00,$FF,$00,$77,$44,$64,$44,$74
PFData2  ;LO      0 1 2 3 4 5 6 7
       .byte $00,$FF,$00,$EE,$A2,$A2,$A2,$E2
PFLColor ; Left side of screen
       .byte $00,$FF,$00,$22,$26,$2A,$2C,$2E
PFRColor ; Right side of screen
       .byte $00,$1F,$00,$6E,$6C,$6A,$66,$62

Notice in registers:
PFData0 is the H
PFData1 is the EL

Then the colors are set in the PFLCOLOR registers.

Since these are playfield graphics they are kind of backward and confusing,
but hopefully this will give you a start.   There is an application someone
wrote caled MakeGraphics or something (I don't quite know where to get
it.)... You can use it to replace the info in these registers and make the
playfield say what you want.

It will help you begin to understand what's going on.

Good luck my friend.
Joel D. Park

----- Original Message -----
From: <braves4515@xxxxxxx>
To: <stella@xxxxxxxxxxx>
Sent: Monday, September 24, 2001 12:45 PM
Subject: Re: [stella] DD_0003

> I just figured out how to run The PLAYFIELD program where it says HELLO
HELLO . ( i find my self proud of this ) . but ok  i dont know where hes
getting the words HELLO to show up on the screen also i dont see how the
colors are done. like the series of colors able to be used . i know the PC
has 256  how many does the 2600 have 8 ,16??? also do you know how the color
is done? these are minor questions i still have also the major ones is
wondering how to create walls within the field itself ( lets say i wanted a
box within the boarders of the game COMBAT for instance. ) how would one go
about programming it? ok please help thanks
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