If you can find a defunct VT240 or 241 box the CPU in there is T-11 (40 pin basic PDP11) which was used on the Falcon card. I'd bet a DC310 can be had cheap if you can find a source. For PDP11s there are three catagories. Unibus machines, large and more complex. Qbus machines (11/03, 11/23 series) smaller more common and easier to work with. Packaged system PDT11/150 (11/03 with 2 8" floppies) or Pro3xx (11/23 or J11 chips with floppy and hard disks). The PDT11/150 if could is a compact system and removes hardware from the picture as its a bounded system. The PROs are bounded but do have option boards. The Qbus systems are most often seen un bounded PDP-11s and are easily configured. The last 3 PDP-11/23s I got were free as in "Here, take it". However if you want a SCSI card or maybe any disk controller those can be harder as those are most often first things stripped. For example I found a microPDP11 with the disks removed as they were MFM and fit PCs of the day. The RQDX controllers are often stripped for Qbus VAXen (microvaxII). Larger disks are like RL02 or RX02 get seperated and "lost" or rescued in preference to the whole system. But a basic box, cpu, memory and serial cards are common and cheap to free. A PC with the right code can simulate TU58 tape and provide a working system that runs RT-11. With a bit of creativity and a Qbus parallel IO card and the PCs infamous and useful printer port a faster parallel disk simulation is doable. Most small PDP11s (11/03, 11/23, 11/23b) have ODT (Octal Debugging Tool) in microcode or local rom so a terminal can be your front pannel making it easy to load a small boot program. If that weren't enough there are a pot load of PDP11 sims that you could develop on till hardware lands on you. Now Minux on PDP11. Minix is not unix, the look to the user the same but internally there is almost no commonality. Unix on PDP11 requires a disk and later versions require the bigger/later 11s that have I&D. Minix once loaded is entirely memory resident and uses relatively small space for itself. For PDP11 I'd expect a 8kW version that runs useful stuff in 24kW (pdp11s without MMU (LSI-11 [11/2 and 11/03]) would not be out of the question due to code efficientcy of the -11. If later CPUs (11/23, 23b, 73 for Qbus) are used then 256kb or 4mb are possible with MMU. An -11 with 256k is a very repectable machine running any OS. Allison