Re: ][+ Video card question(s)

[gberigan@cse.unl.edu (Greg Berigan)]

dempson@actrix.gen.nz (David Empson) writes:
>Peter Maloney <peterm@tlp.apana.org.au> wrote:
>>dempson@actriz.gen.nz (David Empson) sez...

>>>Double hi-res graphics needs an additional 8k of RAM in the auxiliary
>>>bank.  The II+ has no hardware support for auxiliary memory.  Its
>>>video circuitry probably doesn't support double hi-res either.

>>There's a hardware hack in there that, from memory, does strange and
>>impossible things to a II+ display. Maybe this is what the person had
>>in mind?  It was all done with bits of wire, I think...

>I still find this hard to believe.  I can see that the potential is
>there - the II+ does have a 14 MHz clock, for example.  It already
>uses double the horizontal clock speed when drawing low resolution
>graphics.

Well, I do have sitting on some disk a program which achieves 80 column
text on a ][ without the need of a card.  It achieved this through
attaining DHR graphics, but had much flicker and was only readable when
the screen was steady (not scrolling).  It would work on any Apple II.
The program was of German origin.

I'll see if I can dig up the disk.  It may have been wiped by now.

-- 
gberigan@cse.unl.edu (Greg Berigan)

If your use of lose and loose is loose you lose.