... > Well, an obvious question would be: do you really need that much IO > space? PCs have got away with 64K of IO space without having a problem > for years, so 64K per bus should be fine. If you have 3 buses, that > should be 3 * 64K or 192K. Not only that, but most modern PCI (even) cards don't require IO space. Or does this include memory space - which can be much bigger. I have cut one of our FPGA PCIe slaves down from two 8MB BARs to two 1MB ones, with the extra small BARs (eg for MSI-X) the bridge would have allocated 32MB, now 4MB. Fortunately that card only needs to work on x86-64. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
