Re: [Atari800-users] 65816 module progress and more

[Nathan H. <ma...@ma...>]

----- Original Message -----
From: "Jacek Popławski" <jp...@in...>
To: <ata...@li...>
Sent: Wednesday, December 05, 2001 7:28 PM
Subject: Re: [Atari800-users] 65816 module progress and more


> On Wed, Dec 05, 2001 at 07:06:58PM -0500, Nathan Hartwell wrote:
> > Also, I've noticed that the current antic.c code is not written to
display
> > the entire 228 color clock scanline as the ANTIC/GTIA actually create
it.
>
> What exactly is maximum possible screen size of Atari XL/XE ?  I remember
> biggest 1-bit mode in Atari Basic was 320x160 ? hm... after adding 8 it
was
> 320x180...? but that was standard mode, I remember I could change color of
> border, and few application can draw on that border. So... I use 320+2*8
width
> now, becouse I clip 2*12 pixels. You mean it is possible to use that 2*12
> pixels, too, yes? So I should set mode ATARI_WIDTH*ATARI_HEIGHT, without
> cliping that 2*12 pixels?
> I have 320/320+2*8 switch now, so I can extend it to
320/320+2*8/320+2*8+2*12.

Of the 228 color clocks per scanline, the narrow playfield uses 128, normal
uses 160, and wide uses 192.  The remaining clocks are the border.  The
default display list, if I recall, starts with 24 blank scanlines (hence the
3 112's/0x70's at the beginning).  So, technically, a 384x262 (or 384x312 on
PAL) mode should be physically possible on the Atari hardware.  Not that
anything uses that, but if we're going to emulate the system, why not
emulate it all the way.  Right?

>
> --
> They'll take your diamonds, and then give you steel
> You'll be caught in the middle of the madness
> Just lost like them                                 "All The Fools Sailed
Away"
> And part of all the pain that they feel                     - Ronnie James
Dio
>
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