#Blitter/CIA's
3 messages in this thread
Hardware types: Can the Blitter transfer from a parallel register
in one of the CIA's to an ascending or descending ram area? if so,
how big an area? as big an area as can be allocated in CHIP ram?
if not, why? I see ascending and descending modes in the hardware
manual, but I DON'T see a no-inc, no-dec mode… is there one?
if you can blit from a parallel port, then how FAST can you do it?
7 meg? 14 meg? 3.5 meg? (I realize those aren't precise, you get
the idea — obviously it'll be a factor of the bus rate) Why?
I have a hardware project in mind that will benefit all of us, IF
one can blit from the parallel port to ram at a very high rate.
So; Can you? I need a yes/no on that, and I need a "how fast", in
very specific times. And if there are conditions (like shutting off
the video DMA or etc, let me know that, too, eh? Thanks in
advance, –Ben–
Ben,
I don't have my books with me, but I would think that it should be possible.
After all, the serial port, the disk port, and the sound port are all done with
DMA and/or the blitter.
There is a PD LIFE game floating around (may even be here in the DLs) that
uses the blitter as an array processor to generate the generations. It might be
interesting to have a look at the blitter code there.
Regards, Larry.