Big Blue Apples
12-Jul-91 05:25:29
Sb: #28161-Big Blue Apples
Fm: Kelly Jordan 76475,1146
To: Harold W. Grigdesby 76304,3030
Yes and No!
First, you can't feed the SuperVGA card DIG info for two reasons – a) it
wouldn't know what to do with DIG info. b) DIG doesn't exist on the Amiga
to begin with.
If DIG did exist, then what you propose would work if you had a very smart
graphics card, like one of those based on the TI 34020 (I think that is the
device number). But having this wiz-bang superVGA card would not be
enough. The card most likely would not speak Amiga DIG (if it existed), and
even with all the power the 34020 offered, more processor help would be
required. This could be done via a patch or interface program running on
the Amiga that understood the DIG info, translate what could be directly
translated to 34020 code, and have to do everything else that couldn't be
directly translated (such as dealing with fonts). This would work, but
would add a lot of overhead to the Amiga's CPU. So, to get any kind of
performance, a processor would have to be added between the Amiga DIG
commands and the SuperVGA board. This could probably be done by using
something like the AT-BB (since it could also provide the interface path
between the ZoroII bus and the AT bus. Either that, or your "special BB"
would have to provide the processing power required for the interfacing. I
doubt the AT-BB would have enough horsepower to begin with!
Anyway, you are probably seeing that t do what you propose, would start to
get expensive, and also would require the AT bus to be dedicated to the
video application. A DIG display is something, in my opinion, would be
left to a ZorroII card designed for the task.
73, Kelly