Two related writeups on adding IBM PC/XT 5160 Slot 8 Support to the XT-IDE cards: Building + rev 3 install: http://www.glitchwrks.com/2017/02/03/slot-8-support Rev 2 install + K3 hack: http://www.glitchwrks.com/2017/02/05/slot-8-xt-ide-rev2 This works on all XT-IDEs with ISA pin B8 present, which is all Rev 3 boards, I think all of the Rev 2 boards (with serial port), and some of the early rev 1 boards. Most of the production Rev 1 boards have ISA pin B8 removed to save on plating costs, so it's not applicable there. I still have one or two of the prototype boards left, if anyone wants a kit or assembled mod board. I'll be ordering more in the near future, so they're available for the VCF East XT-IDE workshop. Files haven't been uploaded to GitHub just yet, I need to go through them, should be up within an hour or so. Thanks, Jonathan