UNIBUS <-> PCI bridge

Hi Dave :-) Full Ack! I only don't have a RK07 yet :-) Perhaps I could wind a DECTape around my PC to get it into one of the simulators? Your're serious? That could make the thing at least affordable to build. The most important (and difficult for me) part is to design a PCB with an FPGA that plugs into the PCI bus. The other ugly part is the cabling from there to the Unibus/Qbus. The rest is programmable. Those are the features to expect in an early version: * Unibus mapping to PC's memory * Interrupt forwarding to PCI INTA-INTD * Interrupt vector interrogation mechanism Later then: * Unibus arbitration * Unibus memory * QBus Software would initially consist of a "do nothing"-driver for Linux. It would simply find the card and then export the base address into the kernel name space. Other drivers then could use that. Probably also some code for interrupt handling. I am a bit reluctant to register the bridge as a /proc/bus/unibus thing. That would probably only work without much use, as there are no PnP things on the Unibus. Best wishes, Philipp -- http://www.hachti.de