--- Jeffrey Sharp <lists(a)subatomix.com> wrote: Typical of non-DEC boards. If you bought handles from DEC at all, you bought the generic (unstamped) ones. Some people engineered their own fastener (EMC? Emulex?) for later designs to reduce the amount of money per board that ended up in DEC's pockets (reducing manufacturing costs). We always used DEC handles; our volumes were low enough that even at, ISTR, $20 per handle, it wasn't worth us designing our own. Hmm... "AD"... Analog Devices? Anybody else use "AD" in their part numbers? Not necessarily - most DEC and 3rd-party peripherals used 40-pina and 50-pin BERG connectors (40-pin: DMF-32, DL-11 and other serial interfaces, RL11, COMBOARD serial _and_ parallel ports, etc. 50-pin: Emulex serial cards (dual DZ-11 or DH-11 emulators), TU-80 (Pertec interface), a real DZ11, RQDX[123], SCSI, etc.). I'm not saying it _can't_ be a tape interface, but I am saying that 2 x 50-pin-BERG does not a Pertec interface make. No idea what that is. I studied the pictures. A scan of the board near the BERG connectors showing the part numbers of the interface chips for the external device might be illuminating. I do not know what was commonly used for tape devices, but it might help to establish if this is some kind of lab I/O module or tape controller or what. Since there are no 40-pin (6402s) or other ICs larger than about 20 pins (like a 24? pin Motorola UART), I doubt it's a serial card. You do, indeed, have an enigma (not an Enigma ;-) -ethan __________________________________________________ Do You Yahoo!? Yahoo! Movies - coverage of the 74th Academy Awards® http://movies.yahoo.com/