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Re: Mix LGR and Text?
Jorge Chamorro Bieling wrote:
<heuser.marcus@freenet.de> wrote:
Further reading:
"Have an Apple Split" (1982)
http://rich12345.tripod.com/aiivideo/softalk.html
Then answer to Who managed to discover this ?
is then...
Bob Bishop and D. Kottke, R. Nicholson, and B. Smith of
Apple Computer for their helpfull discussions on Apple II video
hardware)
Don't forget Don Lancaster, who did it on his own. ;-)
BTW, about what he says in this article about getting
double-high-resolution by swapping hgr softswitches at every vsync:
He takes care to shift the pixels via the eighth bit setting, but, in
addition, wouldn't the pixel timing need to be half what it is ? I mean,
won't the pixels in fact overlap (instead of interleave) as they last
too long (twice as much) for double hi-res ?
It is true that the pixels overlap, but the effect is still quite
good. Many (limited bandwidth) monitors display an isolated pixel
not as a flat-topped pulse in intensity, but as a gaussian-like pulse,
with a narrower high-intensity top, so results are better than you
might expect.
Also, "the incompatible peripherals" surely must be those whose data-bus
load drains the "floating-now-standing-on-his-own-capacitance" data bus
charge in less than 500nSec.. ?
Yes, a card that loads the data bus would shorten the time constant.
But such loading would also be a no-no. ;-)
-michael
Music synthesis for 8-bit Apple II's!
Home page: http://members.aol.com/MJMahon/
"The wastebasket is our most important design
tool--and it is seriously underused."