On 10/31/2012 02:16 AM, Gregg Levine wrote: SBC 11/21 (boardname KXT11) Falcon and Falcon Plus single board computer on a Qbus card implementing the basic PDP-11 instruction set, based on T11 chipset containing 32 KB static RAM, two ROM sockets, three serial lines, 20 bit parallel I/O, three interval timers and a two-channel DMA controller. Up to 14 Falcons could be placed into one Qbus system. KXJ11 QBUS card (M7616) with PDP-11 based peripheral processor and DMA controller. Based on a J11 CPU equipped with 512 kB RAM, 64 kB ROM and parallel and serial interfaces. KXT11s are very fun boards. I have one, I like it a lot. I don't have any KXJ11 though. They are as rare as hens' teeth, though I do see one on eBay right now for a not-too-terrible price. I just looked at the auction; it says "10+ available"!!! I'll bet he'd accept a lower-than-normal offer if it were for a quantity of them. Bulk purchase? -Dave -- Dave McGuire, AK4HZ New Kensington, PA