= Good Resources: = * \\EDK\doc\psf_rm.pdf : This file contains the formatting definitions for the MHS, MSS, MPD, PAO, BBD, MLD, MDD, and XBD file-types * [http://www.xilinx.com/xlnx/xweb/xil_tx_display.jsp?sGlobalNavPick=SUPPORT&sSecondaryNavPick=&category=-1211679&iLanguageID=1&multPartNum=1&sTechX_ID=rg_cust_periph&languageID=1 Designing a Custom Processor Peripheral Using Xilinx EDK] :a great lengthy article on doing just as the title suggests, written by a Xilinx Engineer. Otherwise just search for “peripherals TechXclusives” on the Xilinx website.