FIFO issues
benjcarson at digitaljunkies.ca
benjcarson at digitaljunkies.ca
Thu Jun 6 00:22:26 EDT 2002
Another thought: we should probably look into seeing if we can get a sample
of a RAMDAC and move some of our FIFOs off the FPGA. That might solve some
issues and free us from using Altera-specific stuff. All at the cost of
more interfacing though. Whoopee!
Next time I've got a spare minute or two at work I'll have a look at Digikey
and see what I can dig up...
Benj
Jeff Mrochuk writes:
> Here's one for ya.
>
> I tried to compile my fifo, and even with only 32x8 its gigantic (14% of our
> chip)
> So I took a look at their design and it turns out the reason its so small is
> because it uses ESB bits. If you disable ESB bits on the altera fifo, our
> 640x8 fifo is 103% of the chip.
>
> Looks like we may have to be a bit more creative in our display, maybe empty
> it as it fills. I'd like to know how commercial hardware does it, maybe it
> just has giant fifo hardware.
>
> In the mean time, do you know if you can tell quartus to use ESB bits on your
> own designs?
>
> Jeff
>
>
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