The depth my system can do is actually only a function of available RAM...
it takes 12 bytes per text line. If you have a single line at a time, then
you need to reload those 12 bytes with appropriate pointers for the next
line - and reposition the sprites, etc., which gives about (say) 5 scanlines
inbetween each text line. You can, however, pre-load multiple lines (the
current sprite system does 6 lines) for a total of 6*12 = 70 bytes of RAM.
So you could do your text as two groups of 6-lines each, but with a much
larger gap between them, as you need to recalculate 70 bytes between -
probably 20 scanlines or so.
Currently each text line is 16 scanlines deep. This is adjustable. Assume
8 is all that is needed, and that we can redo the RAM pointer loads in 5
scanlines, then that's 13 scanlines/row... so I don't see any major obstacle
to having a 20-line display.
So, 18*20 with minimal RAM usage... yeah, I can do that.
Anyone who decides to work on (or collaborate on) an Adventure game... I'll
provide my code and utilities as required.
Cheers
A
----- Original Message -----
From: "Andrew Davie" <atari2600@xxxxxxxxxxxxx>
To: <stella@xxxxxxxxxxx>
Sent: Saturday, January 25, 2003 8:33 AM
Subject: Re: [stella] Experimental Text Screen
> I can extend the sytstem/resolution to 18 x 12, actually, with the same
> flicker
> Cheers
> A
>
> ----- Original Message -----
> From: "Adam Thornton" <adam@xxxxxxx>
> To: <stella@xxxxxxxxxxx>
> Sent: Saturday, January 25, 2003 2:34 AM
> Subject: Re: [stella] Experimental Text Screen
>
>
> > On Sat, Jan 25, 2003 at 01:35:59AM +1100, Andrew Davie wrote:
> > > Attached is a brief experiment I did with multiple lines of text, to
> give a
> > > text-screen. This is really just displaying 3 time-separated
frames...
> so
> > > its nothing too difficult. Flickers, but how does it look on
hardware,
> > > guys? If you really wanted a text-adventure or something.... maybe
this
> > > would be workable. Anyway, just thought I'd have a play with the
idea.
> >
> > Gosh, who might want to do a text adventure?
> >
> > Yeah, this gives you about half the screen resulution of a VIC-20 (18x6,
> > rather than 22x12), which is pretty cool.
> >
> > Adam
>
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