<I've got a Q-bus board I can't identify, its labelled: < Data Systems Design < 44432-4 < <Its a dual height card with a 26 pin idc connector on the top and two <82S100 chips. I'm guessing it is some sort of parallel interface... Sounds like the interface card for the DSD-880 disks systems. They were RX01/2 floppy and RL02 workalikes though they were fixed disks not carts. Allison