From: Ullrich von Bassewitz (uz_at_musoftware.de)
Date: 2002-05-28 19:38:47
Hi!
On Tue, May 28, 2002 at 07:31:41PM +0200, groepaz wrote:
> 1) when you place both bitmaps in one bank, where do you put the
> videoram ? :o)
One hires screen = 8K, color RAM = 1k. Both together fit nicely into one bank.
> 2) working with the ram under i/o (specifically the VIC i/o) is troublesome....
> you cant really use it together with interupts for example. (try it
> :=)) eg when an irq occurs while the ram under the vic is banked in =>
> crash (regardless of correct vectors at both $ffff/fe and $0314/15 and
> regardless where the interupt-service-routine lies in memory)
I don't think this would be a problem. While setting the color RAM, interrupts
can be disabled.
What I'm planing are not graphics capabilities that allow writing demos in C.
My assumption is that most people have a need for something like the old
Borland graphics interface: A simple, reasonable fast interface. No fancy
stuff, but a solid API that allow business applications, simple games (text
adventures like "Hobbit") and the like. Demo authors will have to search
elsewhere:-)
> there were certain other little obscure things i think.... thats why
> most ppl dont use the ram under vic for any gfx stuff
So in principle it should be doable, right?
Regards
Uz
--
Ullrich von Bassewitz uz_at_musoftware.de
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