Hi Matt,
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Right now I have two RAMs, one with a waveform for the DAC, another connected to the ADC. I can load a waveform into the DAC RAM and see it get filled into the ADC RAM. Im now about to write up some TCL scripts that use the 'in-system' memory content editor. Is this a bad way of doing things? I know it is quick and dirty, but it seems to be working.
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If there are Tcl commands for the in-system memory editor, then by all means, go for it. I haven't used that particular tool, so can't comment on how efficient it is.
If you want to have a design that you can also simulate in Modelsim, then take a look at the JTAG components, or ask, and I'll show you how to use them.
Cheers,
Dave