booting from RQDX3

How does a PDP-11 boot from an RQDX3 controller? I have several 11/23's based on the KDF11-AA CPU, which has no on-board boot ROM. The Andromeda UDC11 disk controller that most of these use contains the boot ROM. These machines are in a 4-slot dual-wide card cage which is full. There is the CPU, a memory card, the disk controller, and a serial card. A couple of these machines are missing the disk controller. RQDX3's seem to be readily available, and there is adequate documentation of the card on the web (jumpers, cable pinouts, etc). Will the KDF11-AA be able to boot from an RQDX3? If not, can anyone suggest an good alternative? -- Jonathan Engdahl Rockwell Automation Principal Research Engineer 24800 Tungsten Road Advanced Technology Euclid, OH 44117 USA Euclid Labs http://users.safeaccess.com/engdahl