Re: Apple II vs Atari 800

["Russg" <russgilb@MUNGEsbcglobal.net>]

"nem" <> wrote in message news:
> Thomas Richter <> wrote in news:
>
> > I afraid so. The c64 had no graphic support in its rather limited basic.
>
> That's because it used a BASIC originally written for the PET, a machine
> with no sound or actual graphics. To draw an orange line (like in your
> example) on the C64, you'd have to do this:
>
> 5 ba=8192:poke53272,peek(53272)or8
> 10 poke53265,peek(53265)or32
> 20 fori=batoba+7999:pokei,0:next
> 30 fori=1024to2023:pokei,128:next
> 40 pokeba,128:pokeba+1,64
> 50 pokeba+2,32:pokeba+3,16
> 60 end
>
> This just draws a few pixels in the upper left corner of the screen, but
> should give you an idea of what's involved.
Seems like the C=64 has a fixed screen memory,
and you're poking into that memory.
That can be done on the Atari.  The Atari screen
memory can be moved, as can the display list,
which is a small program for the graphics chip
to execute.