Hi all, I'm trying to ask here, since searching the russian internet and asking russians not helped me at all. I do have an craddle with something of an 11/03 clone and a RX01/02 double disk drive. The computer is an Elektronika E60 and looks like this: http://commons.wikimedia.org/wiki/File:E60M.JPG?uselang=ru This is the CPU card (my own picture): http://www.tiffe.de/Robotron/E60/E60-01.jpg the pink chips at to are dynamix 4kx1 RAM like the Intel 2107 the CPU itself is on the right side, a RALU, the Control Unit and 3 Microcode ROMS. That all on a Quad size board, but altough it is a QBUS nothing fits to a real DEC Machine since all Dimensions are metric, including the connectors. I have this beast running, with FODOS which is in fact RT11 and some RT11v4.x andRT11V5. Variants. Now comes my Problem: http://www.tiffe.de/Robotron/E60/I17.jpg This is a tape controller for drives like this: http://www.tis.kz/cm53001.php (russian site) at this site there is an other controller connected, a more modern one with an 8080 CPU and two 8255s on it. As you can see the cable to the drive is directly soldered to the board. All kind of russian Sources are listing my Controller Board MC2702 or I17 (with a cyrillic letter 'i') as one of two possibilities to connect the CM5300.01 drive to this computer, the other possibility is is an entire craddle full of simple TTL chips that must be connected to the E60. My I17 or MC2707 controller has four AM2901 compatible chips (K1804VS1) and a AM2910 (K1804VU4), some microcode ROMS etc. The two 40 pole connectors are electrically connected in parallel, maybe to connect two drives. There is a similar controller to mine: http://andy.sumy.ua/old_computers/world_museum/dvk/DVK_Type.jpg with a single 50 pin connector for the drives and the same AM29x series chips on it. For this controller the schematics are exiting..what doesn't help me that much, since because that is a microprogrammed CPU all functions of the interface, what is using different ICs, are depending on the microprogramm. Ther are single 7474 Flipflops where D is connected to the drive connector for example, I'll never find out what kind of input this may be w/o some dokumentation. At least the ROMs are socketed but to find out what happens I had to find out the complete schematic and then dissassembling Microcode... :-| The russians are listing that controller as standard, but no one knew something about it, there is no documentation available anid no one in russia seems to have such a beast. (two german friends of mine have two other boards but waiting if I can come up knowing how to use them..) The controller is listening on standard addresses on the bus (don't ask me for now, it's a while since I've checked this) and it seems to react to a reset command, seems to be alive... Please guys, I' looking fo any documentation about this thing or at least for the pinout of the cable to connect it to an CM5300.01 (bulgarian) 9 Track drive. (Should have 3 connectors at the other end so far as I know). I've searching for over a year now, hope someone from one of the other countries behind the iron curtain before is listening here and can help.. Please help! Kind Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741