Onchip Memory size problem in SOPC Builder

Look at the blocks available in the 90, i.e.:

4 M-RAMs, 408 M4Ks, and 488 M512s.

Break your requirements down to depthxwidth and see how they fit. For example, if you'r 32Kbyte is 16kx16, then that would fit into a single M-RAM. If you're 80Kbyte is 40Kx16, that won't fit into a signle M-RAM and would require 2. With two of those blocks, that would push you into 5 M-RAMs and a no-fit. So in that case, you could break your 80KByte into a 32Kx16 that uses one M-RAM, and then build an 8Kx16 out of M4Ks. (The megawiazrd will generally not use different RAM types to build a RAM, i.e. it won't automatically stitch M-RAMs and M4Ks together, which is why you would build it out of two individual RAMs and use the MSB to select which RAM is being read to or written from).

To put this into an SOPC system, you'll probably have to wrap it in a single file and replace the file that SOPC builder creates. I'm not sure on that one, so maybe someone else has input...