Does anyone have the technical reference manual for signals needed to interface with the DBA hard drive connector on the model 70? (would also apply to 50z and 55sx I believe). I'm running running a 70 with 2 memory expanders and a XGA card. Ideally would rather just shim in a ARM/FPGA to SD card rather than waste a slot on a scsi adapter. Currently running a Jaz drive off the parallel port, but I don't think OS2 would play well with that setup.