Re: Double lowres graphics?

[Dennis Jenkins <dennis@usb.com>]

Mike Pfaiffer wrote:
> Dennis Jenkins wrote:
>         Oddly enough, for the machines you mentioned, double lores is
> implemented in Applesoft. The only catch is you have to switch to the
> mode to access it. I think there are only three settings which need to
> be changed. This can be done through Applesoft as well. I think they are
> the same settings needed for double hires except the lores setting is
> selected instead of hires.
> 

Do I need to "poke" any values into zero page, such as the screen width
of $50h?

I will research my softswitches soon and try some stuff.  I wonder if
the emulators, like applewin and xgs32 honor double low res.  Scratch
that.  I just verified that Applewin does not do 80x40+80x4.  It does
40x40+80x4 (mixed mode, 80 column text, lowres graphics).  Bummer.  XGS
doesn't appear to support lowres graphics.  My version does highres but
not lowres...  (I have XGS v 1.6).

Do any of the older machines NOT support double low res?  Is it safe to
assume that ALL Apple II's with 128K ram have double low res capability?

obComplaint:
  Why does prodos have to load $SYS programs into the highres memory
area?  That sucks.  I want to write a program as a prodos-8 native .SYS
program AND use highres graphics.  Writing a relocated is not easy right
now, esp. since I use the CC65 cross compiler...  For now, I'll just
stick to .BIN files that load at either 800h or 4000h.  Argh!


-- 
dennis@usb.com                           Universal Savings Bank.

The three most dangerous things are a programmer with a soldering
iron, a manager who codes, and a user who gets ideas.