To address James' concern for knowing how to program the NCR 53C80: Halfway down this page, the first datasheet PDF, is a scan of the NCR5380 family data sheet with register definitions, etc: http://www.datasheetarchive.com/53C80-40-datasheet.html The only cards I've ever seen with this chip were ISA bus cards wired to respond to I/O space accesses. These chips can be wired for MMIO as it's just really a difference in the address decode logic. (In fact Appendix B of the datasheet shows the chip wired up to a 65C02 - an ancient processor design that has no notion of I/O address space so its I/O must be memory mapped.) I can't seem to find a datasheet for the NCR53C400 or NCR53C400A. The NCR53C80 datasheet introduction implies the 5380 is used as a core in the 53C400 though. Since LSI Logic owns all of Symbios Logic's IP (NCR sold off Symbios long ago), you may just need to ask LSI Logic if they have a 53c400 datasheet available. Regards, Andy -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
