If you have not already read UG383, you should give this a read. It is only 34 pages long, and explains the conditions in which a single native Spartan-6 18Kbit BRAM can be used as two independent 9Kbit BRAMs.
If you have not already read the New Users Forum README thread, you might find some useful information there -- including the following:
1. Read the manual or user guide. Have you read the manual? Do you know where to find the manual?
Many of the questions are answered with a simple and quick search of the FPGA family datasheet, or a related document. Of course, the first problem is locating the correct document -- there are 100s of them. For most current software and device families, Xilinx provides a software tool for finding and accessing useful documents. This tool is called DocNav, it installs on your PC, and you can download it with this .ZIP file link.
-- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369
Summary:
1. Read the manual or user guide. Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts. If I write a good post, then I have been good for nothing.
