MIT provides MULTICS source and documentation (DPS-8 simulation)

Yes. However, a lot of host adapters do not support target mode, and some don't even support using an ID other than 7. The former is somewhere between ignorable and fatally crippling, depending on what you want to do; the latter is fatal. (Well, almost; I have toyed with the idea of wiring up the data lines in a different order, and permuting the bits in software to make up for it, so that each bit of SCSI hardware thinks it is ID 7. But I've never tried doing it; it's possible there's some reason it couldn't work....) After all, the only special thing about a host adapter is that it usually is an initiator rather than a target (in most systems, it is the only device that is ever an initiator, and is never a target). /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse at rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B